Find the value of the expression (2x − 12) + (xy-10) for x = 8 and y = 2.
-
O-8
O 6
O-10
02o
Answers
The required value of the expression (2x − 12) + (1/2 xy - 10) for x = 8 and y = 2 is 2. Option D is correct.
First, let us understand the algebraic expression and how is it formed:
A multitude of strategies is used to build algebraic expressions utilizing variables and constants. It is a term-based mathematical expression that comprises variables, constants, and algebraic operations such as addition, subtraction, and so on.
We are given:
(2x − 12) + (1/2 xy - 10)
We need to find the value of the given expression for x = 8 and y = 2.
Substitute the values of x and y in the given expression, we will get;
(2 * 8 − 12) + (1/2 * 8 * 2 - 10)
= (16 − 12) + (8 - 10)
= 4 + (-2)
= 4 - 2
= 2
So, the obtained value is 2.
Thus, the required value of the expression (2x − 12) + (1/2 xy - 10) for x = 8 and y = 2 is 2. Option D is correct.
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Related Questions
Which of the following expressions will have a product greater than 4? pls answer with the questions in the pic
Answers
Answer:
Answer D
Step-by-step explanation:
Multiply them all out. D is 4.04
Answer: D is correct I took the test without having to see the answer just wanted to help u out:)
Step-by-step explanation:
For each equation, find y when x = -6. Then find x when y = 20.
y = 6x +8 solve for y and x
y = 2/3x solve for y and x
y = -x + 5 solve for y and x
y = 6.5x + 7 solve for y and x
Answers
x=14/3 and y=-28 when x = -6. and y = 20 for equation y = 6x +8
x=30 and y=-4 for when x = -6. and y = 20 for equation y = 2/3x
x=-15 and y=11, when x = -6. and y = 20 for equation y = -x + 5
x=2 and y=-2 , when x = -6. and y = 20 for equation y = 6.5x + 7
What is Equation?Two or more expressions with an Equal sign is called as Equation.
For equation y = 6x +8
When x=-6
y=6(-6)+8=-36+8=-28
when y =20
20=6x+8
28=6x
x=28/6=14/3
x=14/3 and y=-28 when x = -6. and y = 20 for equation y = 6x +8
For equation y = 2/3x
When x=-6, y=2/3(-6)=-4
y=20, 20=2/3x
60=2x
x=30
x=30 and y=-4 for when x = -6. and y = 20 for equation y = 2/3x
For equation y = -x + 5
When x=-6, y=6+5=11
When y=20,
20=-x+5
15=-x
x=-15
x=-15 and y=11, when x = -6. and y = 20 for equation y = -x + 5
For equation y = 6.5x + 7
When x=-6
y=6.5(-6)+7
y=-39+7=-2
When y=20
20=6.5x+7
13=6.5x
2=x
x=2 and y=-2 , when x = -6. and y = 20 for equation y = 6.5x + 7
Hence,
x=14/3 and y=-28 when x = -6. and y = 20 for equation y = 6x +8
x=30 and y=-4 for when x = -6. and y = 20 for equation y = 2/3x
x=-15 and y=11, when x = -6. and y = 20 for equation y = -x + 5
x=2 and y=-2 , when x = -6. and y = 20 for equation y = 6.5x + 7
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PLEASE HELP! QUICK!
It costs $15 to become a member at Workout World Gym and then $30 per month for a membership.
A. What is the total cost (start-up fee and monthly charger) to be a member of Workout World Gym for 2 months? Show your work.
B. What is the total cost for x months? (Please show how you got it)
C. Graph the cost of the membership over a period of 2 years, using months as the units of time. Be suet to label your axes and scale them by labeling each grid line with a number.
D. Is there a proportional relationship between time and costs of the gym membership plan? Explain how you know.
Answers
Answer:
A) $75
B) y = 30x + 15
C) (24, 735) **graph below
D) Yes, there is a proportional relationship
Step-by-step explanation:
We can represent this relationship with an equation.
y = 30x + 15
where x would represent the months and y would be the total cost. The 15 would be the initial fee, which only occurs once.
A) Using the relationship [tex]y = 30x + 15[/tex], we can substitute 2 for x, since that would represent the months.
[tex]y = 30x + 15\\y = 30(2) + 15\\y = 75[/tex]
It would be 75 dollars.
B) The total cost for x months would just be the relationship
[tex]y = 30x + 15[/tex]
C) 2 years would represent 24 months. The screen shot below would represent the relationship. The y axis would be the total cost in dollars and the x axis would be the months. (24, 735)
D) Yes, there is a proportional relationship because as the time (months) progress or increases so does the price (dollars). The graph is linear too, which means it increases.
The distance of a golf ball from the hole can be represented by the right side of a parabola with vertex (−1, 8). The ball reaches the hole 1 second after it is hit. What is the equation of the parabola, in vertex form, that represents the ball's distance, y, from the hole, x seconds after the ball is hit?.
Answers
The equation of the parabola, in vertex form, that represents the ball's distance, y, from the hole, x seconds after the ball is hit is
y = (-2m/s^2)t^2 + (-2m/s)t + 6m
Define quadratic equation.ax² + bx + c = 0 is a quadratic equation, which is a second-order polynomial equation in a single variable. a 0. It has at least one solution because it is a second-order polynomial equation, which is guaranteed by the algebraic fundamental theorem. The answer could be simple or complicated.
Given,
Assume for the moment that the hole is located at y = 0m, where x represents the time variable.
We are aware of:
The vertices are (-1s, 8m).
x in seconds and y in meters, I presume
The ball enters the hole at time x = 1s, hence we also have the following point:
(1s, 0m).
The vertex of the quadratic equation y = ax2 + bx + c is located at:
x = -b/2a,
Next, we have:
-1 = -b/2a.
Next, we have equations for trees:
8m = a(-1s)2, b(-1s), and c
0m = (a(1s)2) + (b(1s)2) + (c)
-1s = -b/2a.
The third equation should have one variable isolated first, and then it should be substituted in one of the other two:
1s2a = b.
Therefore, we can change b to bi 1s2a in the first two equations.
8m = 1s×2a×1s - a×1s2a1s + c
0m = 1s×2a×1s + a×1s×2a + c
We can combine the two equations to get:
8m is equal to a(1s2 - 2s2) + c, or a×1s2 - c.
0m is equal to a(1s2 + 2s2) + c, or a×3s2 + c.
We may quickly remove c from the second equation and then substitute it in the first equation:
c = -a3s^2
The initial equation is now:
8m is equal to -a×1s2 - a×3s2 - a×4s2.
a = 8m/-4s^2 = -2m/s^2.
We can now determine the values of c and b using a.
c = -(-(-2m/s2)*3s2)*3s2 = 6m.
B is equal to 1s*2a = 1s*(-2m/s2) = -2m/s.
The equation is then:
y = (-2m/s^2)t^2 + (-2m/s)t + 6m
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The equation of a line is y = -3x – 2. What are the slope and the y-intercept of the line?
A.
slope = -3 and y-intercept = 2
B.
slope = 3 and y-intercept = -2
C.
slope = 3 and y-intercept = 2
D.
slope = -3 and y-intercept = -2
Answers
Answer:
D
Step-by-step explanation:
The slope if before the x so in this case it's -3.
The y-intercept is at the end so it's -2.
Answer:
D. slope = -3 and y-intercept = -2
Step-by-step explanation:
Slope Intercept Form:
y - y₁ = m(x - x₁) (original version)y = mx + b (simplified version)The variables:
m ⇒ represents slopeb ⇒ represents the y-intercepty = -3x -2
m = -3b = -2You invet $892 at the end of each year in an invetment with annual rate of return 6%. How much will the invetment be worth after 15 year?
Answers
You invest $892 at the end of each year in an investment with annual rate of return 6%. Then the investment worth after 15 year will be 14182.8 dollar
we know that
SI = prt
where
SI= simple interest
A= amount
P= principal
r= rate
t= number of year
according to the question
SI= 892* 0.06*1
= 53.52
A = 892+53.52
= 945.52
after 15 years amount will be
A= 945.52*15
= 14182.8
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Membership in the Volunteers Club increased by 15% from last year. If the number of members last year was m, complete a simplified expression to represent the number of members this year. Enter your answer in the box.
m
Answers
The simplified expression to represent the number of members this year is 1.15m
What is an expression?An expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both.
From the information, the membership in the volunteers Club increased by 15% from last year. If the number of members last year was m.
The number of members will be:
= Old members+ Increase in members
= m + (15% × m)
= m + 0.15m
= 1.15m
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Identify the graph of the rational function with an x-intercept at (–4, 0) and (4, 0), a vertical asymptote at x = 2, and an oblique asymptote at y = x + 2.
Answers
The equation for the rational function will be f(x) = (x² - 16)/(x - 2) and the denominator cannot be zero.
What is a function?It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
It is given that:
The rational function with an x-intercept at (–4, 0) and (4, 0), a vertical asymptote at x = 2, and an oblique asymptote at y = x + 2.
The rational function has x-2 in the denominator.
The denominator cannot be zero.
The rational function will be:
[tex]y=\dfrac{\left(x^{2}-16\right)}{x-2}[/tex]
Thus, the equation for the rational function will be f(x) = (x² - 16)/(x - 2) and the denominator cannot be zero.
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Answer:
its a
Step-by-step explanation:
Which graph shows y= 1/2 [x]?
Answers
The third graphical representation is that of the function y = 1/2[x] .
The given function is y = 1/2[x] .
This is called the box function or the greatest integer function.
So for the equation of the line y = 1/2 x the graph passes through origin and through the points (2,1) , (4,2) and many more.
Now for the greatest integer function will take all the values of x greater than 1 up to 2 and round it off to 2.
so the points on the graph will be.
(2,1) , (3,1.5) , (4,2)....
This is clearly seen in the third option.
The integer function that returns an integer closest to the given real number is the largest integer function. also referred to as the step function. The greatest integer function rounds the input to the nearest integer. As a result, the equation to get the greatest integer is rather simple. It has the sign x, where x can represent any value.
The letter "x" denotes the biggest integer function for each real function. Real values are rounded to the nearest integer that is smaller than the input value by the function. Another term for this function is the floor function.
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A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were determined to be 1234 and 120 respectively. The standard error of the mean is.
Answers
The standard error of the mean is 11.99
Given,
In the question :
No. of observation is 100
The sample mean is = 1234
Standard Deviation is = 120
To find the standard error of the mean.
Noe, According to the question:
No. of observation:
N = [tex](C_{v}[/tex] / ∈[tex])[/tex] ^2
Where,
∈ = allowance % error of mean
[tex]C_{v}[/tex] = coefficient of variation
[tex]C_{v} =[/tex] σ / x bar × 100
σ = standard deviation and x bar = mean
x bar = 1234 , σ = 120 and N = 100
[tex]C_{v} = \frac{120}{1234}[/tex] × 100
[tex]C_{v}[/tex] = 9.72%
N = [tex](C_{v}[/tex] / ∈[tex])[/tex] ^2
100 = (9.72/∈)^2
100∈^2 = (9.72)^2
∈^2 = 0.944784
∈ = 0.972%
The standard error of mean = mean x percentage of absolute mean error
= 1234 x 0.972/100
= 11.99
Hence, The standard error of the mean is 11.99
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Graph JKL with vertices J(1, 3), K(5, 0), and L(7, 4) and its image after the glide reflection with a translation along <0,-3> and areflection in the y-axis.
Answers
JKL with vertices J(1, 3), K(5, 0), and L(7, 4) and its image after the glide reflection with a translation along <0,-3> and areflection in the y-axis is J'(-1, 0), K'(-5, -3), L'(-7, 1).
In the given question we have to graph JKL with vertices J(1, 3), K(5, 0), and L(7, 4) and its image after the glide reflection with a translation along <0,-3> and areflection in the y-axis.
The given vertices are J(1, 3), K(5, 0), and L(7, 4).
Firstly translation along (0,-3).
So translation is (x,y)→(x,y-3)
J'=(1, 3-3)=(1, 0)
K'=(5, 0-3)=(5, -3)
L'=(7, 4-3)=(7, 1)
We have to find the reflection in the y-axis so (x,y)→(-x,y).
Now the points are J'(-1, 0), K'(-5, -3), L'(-7, 1).
The graph of the glide reflection with a translation along <0,-3> and a reflection in the y-axis is given below.
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Suppose that you draw two cards from a well-shuffled deck of 52 playing cards without replacement. What is the probability that the second card is an ace, given that the first card is an ace?.
Answers
Probability that the second card is an ace, given that the first card is an ace is 1/ 221
Without replacement means drawing the card first but not putting back to the deck and then drawing again.
Total number of cards in a deck = 52
Number of an ace in whole deck = 4
let event of getting an ace in first draw be A
and event of getting an ace in second draw be B
P(A) = 4 / 52 = 1 /13
drawing without replacement
P(B) = 3 / 51 = 1 / 17
Probability that second card is an ace given that first card is an ace is
P(A).P(B) =
1/13 × 1/ 17 = 1 / 221
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An article costs Rs 750. all prices are reduced by 40 % in a sale.
find its sale price.
Answers
Answer:
Rs. 450
Step-by-step explanation:
Selling Price ----- 750
Reduced by 40% therefore 40/100 x 750
=300
750-300= 450
Answer:
$450
Step-by-step explanation:
40 percent *750 =
(40:100)*750 =
(40*750):100 =
30000:100 = 300
750-300=$450
g a coin is tossed 10 times, recording whether it comes up heads or tails each time it is tossed. how many outcomes involve at least 8 heads?
Answers
Using combination formula , total 987 ways or outcomes are possible /involve atleast 8 heads.
We have given that, a coin is tossed 10 times .
total possble outcomes = 2¹⁰ = 1024
here, the chances of occurrence of tail and heads and equal so, this is independent event .
we want to calculate total numbers of possble wats atleast 8 heads occurs .
At least 8 heads means exactly two toss gives Tail as a result.
here we count sequences with exactly 8 heads, and also count sequences with more than three heads. We could compute this by equivalent, by subtracting from 1025 the number of sequences with no head, only one head, and only 2 heads
= 1024 - ⁸C₀ ( + ⁸C₁ + ⁸C₂ )
= 1024 - ( 1+8+28) = 1024 - 37
= 987
Hence , 987 outcomes involve atleast 8 heads.
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12. Jill has 20 coins, consisting of nickels and dimes
totalling $1.40. How many nickels does Jill have?
Hint: Let the number of nickels be n, and the
number of dimes be 20 - n.
Answers
The number nickel is 12, and the number dimes are 8 if Jill has 20 coins, consisting of nickels and dimes totaling $1.40.
What is a linear equation?It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.
It is given that:
Jill has 20 coins, consisting of nickels and dimes totaling $1.40.
Let the number of nickels be n, and the number of dimes is 20 - n.
$1 = 10 dimes
$1 = 20 nickels
(1/20)n + (1/10)(20 - n) = 1.40
After solving:
n = 12
The number nickel = 12
The number dimes = 20 - 12 = 8
Thus, the number nickel is 12, and the number dimes are 8 if Jill has 20 coins, consisting of nickels and dimes totalling $1.40.
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What is the answer
The question is what is the equation of line a and then b
Answers
B) line B: Y=4
an airplane is travelling down a runway at a speed of 66 feet per second, when it begins to slow down. the airplane decelerates at a constant rate of 6 feet per square second. how many feet does the airplane travel before it stops? (do not include units in your answer.
Answers
With deceleration of 6 ft/s² and initial speed of 66 ft/s, the airplane will stop after travelling 363 ft.
Use the equation of motion:
v² = u² + 2 · a · s
Where:
v = final velocity
a = acceleration
u = initial velocity
s = distance
Deceleration is a negative acceleration.
Parameters given from the problem:
u = 66 ft/s
a = - 6 ft/s²
v = 0 since the airplane stops.
Plug these parameters into the formula:
v² = u² + 2 · a · s
0 = 66² + 2 · (-6)· s
s = 66² / 12
s = 363 ft.
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Can I get some help please?
Answers
Answer:
66
Step-by-step explanation:
The angle 108 is equal to the angle 42 plus the vertical angle to x
108-42 = 66 this is the measurement for the vertical angle to x. Vertical angles are congruent so angle x is 66
Finding Angle Measures When Parallel Lines Are Cut By a Transversal
Answers
Answer and Explanation:
m∠1 = 43° because opposite angles are congruent
m∠2 = 137° because ∠2 and 43° are supplementary, so m∠2 + 43° = 180°
m∠3 = 137° because opposite angles are congruent, so m∠3 = m∠2
m∠5 = 43° because alternate angles are congruent
m∠6 = 137° because ∠5 and ∠6 are supplementary, so 43° + m∠6 = 180°
m∠7 = 137° because alternate exterior angles are congruent, so m∠7 = m∠2
m∠8 = 43° because alternate exterior angles are congruent, so m∠8 = m∠1
Answer:
angle 1: 43
angle 2: 137
Step-by-step explanation:
Lets find angle 1 first :)
Since oposite diagonal angles are the same, this will make angle 1 43 degrees :)
Now lets find angle 2!
Since 1 was 43 degrees, and a flat line is 180 degrees we must subtract!
Lets do that now!
180 - 43 = 137
Angle 2 will be 137 degrees!
Have an amazing day!!
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5 Each unit on the grid represents 1 mile. For Tia
to travel from the park to the library, she must
go 3 miles south and 5 miles west. Which
represents the coordinates of the library?
A (0, -8)
B (10,-8)
C (-8, 0)
D (-8, 10)
Answers
The coordinates that represents the position of the library is (0, -8)
Each unit on the grid represents 1 mile
Tia is going from park to library
The coordinates of the park = (5, -5)
First she must go 3 miles to the south, Therefore there will be change in the y coordinates and the x coordinates will be same
New coordinate of the Tia's position = (5, -8)
Then she must go 5 miles west, there will be change in the x coordinates and the y coordinates will be same
New coordinates of the Tia's position = (0, -8)
Hence, the coordinates that represents the position of the library is (0, -8)
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A certain species of bird was introduced in a certain county 25 years ago. Biologists observe that the population doubles every 10 years, and now the population is 21,000. What was the initial size of the bird population?
Answers
The initial bird population density is 3713.
Given info;
A certain county received a new species of bird 25 years ago. According to biologists, the population doubles every ten years and is currently 21,000 people.
To get the initial size of the bird population;
We use the formula,
[tex]P(t)=Po* 2^\frac{t}{10}[/tex]
Where Po is the initial population and t is the time in years.
[tex]21000= P(25)=Po*2^\frac{25}{10}[/tex]
[tex]21000= Po*2^\frac{5}{2}[/tex]
[tex]21000= 4\sqrt{2}*Po[/tex]
[tex]Po = 21000/4\sqrt{2}[/tex]
[tex]Po = 3712.31\\Po = 3713[/tex]
Hence, the initial size of the bird population is 3713.
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Fill in the table using this function rule.
y=-5x+1
X
-2
0
2
4
y
0
0
0
0
Start over
S
Answers
Answer:
x y
-2 -9
0 1
2 -9
4 -19
explanation:
you simply replace the x with the figure given in the x table or columns or rows
Answer:
so -2024y0000 division is s
Which is in between 120º F and 130º F?
Answers
Answer:
121-129 F is in between
Step-by-step explanation:
(−100) ÷ {200 − (14 − (−16) ) × 5} + 10 =
Answers
Answer: 8
Step-by-step explanation:
= (-100) ÷ (200 - (14 + 16) x 5) + 10
= (-100) ÷ (200 - 30 x 5) + 10
= (-100) ÷ (200 - 150) +10
= (-100) ÷ 50 + 10
= -2 + 10
=8
Answer: 8
Step-by-step explanation: Remember BIDMAS, order of operations (brackets, indices, division, multiplication, addition, subtraction), since we have multiple brackets inside one another we'll start with the most inner brackets and then work from there.
14-(-16) = 30
30 x 5 = 150
200 - 150 = 50
(-100) ÷ 50 = -2
-2 + 10 = 8
The volume of a cone with height h and radius r can be found using the formula V
Find the volume of a cone with radius 9 feet and height 6 feet.
ft3
1
Tr²h
Answers
Answer:
508.94
Step-by-step explanation:
V = 1/3pi(r^2)(h)
plug in the values of r and h
V = 1/3(pi)(9^2)(6)
simplify
V = 508. 9380099
Round to nearest hundredth
V = 508.94
The car makes one complete rotation about its circuit
every 36 minutes, at a fairly constant rate. Through how
many degrees would the car, which starts from its original
position, drives by the circuit from 8:00 AM to 3:00 PM,
on the same day.
Answers
8 AM to 3 PM is 7 hours = 420 mins
Find how many rotations:
420 / 36 = 11.66666 rotations
Using ratio
1 rotation : 360 degrees
11.66666 : x degrees
x = 11.66666 / 1 * 360 = 4200 degrees
help please and thankyou
Answers
The ratio that can be used to find x is sin 21 = x/22.
What are the trigonometric ratios?The trigonometric ratios are the ratios that we can use to obtain the sides and the angles that are in a right angled triangle. The term right angled triangle has to do with a triangle that has one of its angles as 90 degrees.
Now;
Given that;
Sin θ = opposite/hypotenuse
opposite = x
hypotenuse = 22
θ = 21 degrees
It now follows that to obtain the side x we have to use;
sin 21 = x/22
Hence, in looking for the side x, we have to use sin 21 = x/22
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Can anyone please help meee!!
Answers
Answer:
equilateral acute
Step-by-step explanation:
equilateral-- all the sides have the same length
acute-- all the angles are below 90 degree
Answer:
Step-by-step explanation:
You'r answer should be an equilateral acute.
Your rate of pay is 9.45 per hour if you workers 5 hours for 3 days and 7 hours for 2 days what is your gross pay before deductions
Answers
Answer: 274.05 dollars
Step-by-step explanation:
9.45 x 5 x 3 = 141.75
9.45 x 7 x 2 = 132.3
141.75 + 132.3 = 274.05
Brainliest by any chance?
Which of the following is true about these similar triangles dilated by scale factor r?
A) AB = rDF
B) AB = rAB
C) AB = rDE
D) AB = rEF
Answers
AB = r AB
This is a dilation of similar triangles dilated by scale factor r.
Option B is the correct answer.
What is a triangle?It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.
We have,
Dilation means the original triangle is resized by the given dilation scale factor.
We multiply the scale factor with the original value.
Here,
AB, DE, and DF are the sides of the triangle.
If a side of the triangle is dilated we must have the same side along with the dilation scale factor r.
Now,
A) AB = r DF
This is not correct.
B) AB = r AB
This is correct.
C) AB = r DE
This is not correct.
D) AB = r EF
This is not correct.
Thus,
AB = r AB
This is a dilation of similar triangles dilated by scale factor r.
Option B is the correct answer.
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