Answer:
x2 + 7y = -64 (if x = -5 and y = -8)
Step-by-step explanation:
x2 + 7y
(-5 × 2) + (7 × -8)
-10 + -54 which is the same as -10 - 54
-64
The value of expression x² + 7y at x = - 5 and y = - 8 is, - 31.
What is an expression?Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
We have to given that;
The expression is,
⇒ x² + 7y
And, x = - 5 and y = - 8
Now, Substitute the value of x and y in the expression, we get;
⇒ x² + 7y
⇒ (-5)² + 7×- 8
⇒ 25 - 56
⇒ - 31
Thus, The value of expression is, - 31.
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johns dinner costs $52.30. Sales tax is 6.5% and he wants to leave a 20% tip for the waitress. what is the total cost for johns meal ???????
Answer:
The total cost for john's meal would be $66.84
Step-by-step explanation:
6.5% of 52.30 = 3.3995
52.30 plus 3.3995 = 55.6995
20% of 55.6995 = 11.14$
55.6995 + 11.14 = $66.84
Help please. Will give brainlist
Evaluate the expression when a = -9 and b = - 4.
a? - 2(b + 12)
Answer:
-25
Step-by-step explanation:
-9 - 2(-4 + 12) = -25
Eleanor must earn at least 70 points for her book report project. So far on the rubric she has 54 points. Write and solve an inequality to show how many points Madeline needs.
Answer:
[tex]x + 54\ge 70[/tex]
[tex]x \ge 16[/tex]
Step-by-step explanation:
Given
[tex]Total = 70[/tex] (at least)
[tex]Accumulated = 54[/tex]
Required
Express as an inequality
In inequalities, at least means [tex]\ge[/tex]
So, the expression is:
[tex]x + Accumulated \ge Total[/tex]
Where x represents the additional points
[tex]x + 54\ge 70[/tex]
Solve for x
[tex]x \ge 70 - 54[/tex]
[tex]x \ge 16[/tex]
Hence, she needs at least 16 points
You earn $102 for doing 12 hours of yard work. Your friend earns $120 working at a store for 15 hours.
a. Who earns more per hour?
b. What would you earn in if you did 15 hours of yard work, paid at the same hourly rate?
Answer:
You earn more per hour and you would get $127.50
Step-by-step explanation:
You can find how much money you get per hour by dividing! 102 divided by 12 is 8.5 and 120 divided by 15 is 8 so you get more!
PLEASE HELP I WILL GIVE BRAINIEST. How many students received less than 6 gifts?
3+6+3
3+6=9+3=12
12 students received less than 6 gifts.
Hope this helps
Which function or functions have a slope equal to the slope of Function 1?
Answer:
function 2 only
Step-by-step explanation:
The Function that have a slope have 1 is Function 1.
What is Slope?A line's slope is determined by how its y coordinate changes in relation to how its x coordinate changes. y and x are the net changes in the y and x coordinates, respectively. Therefore, it is possible to write the
change in y coordinate with respect to the change in x coordinate as,
m = Δy/Δx where, m is the slope
From function 1, the slope is
Slope = (0-2)/ (1- 3)
Slope = (-2)/ (-2)
Slope = 1
Now, for function 2 the slope is
Slope = 2
and, for Function 3 the slope is
Slope = 0
and, For function 4 the slope is
Slope = 3/2
Thus, Slope of function 1 have slope 1.
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Find the value of a when x=10 a=5x(squared)/2
Answer:
a = 5(10²)/2
a = 5(100)/2
a = 250
Hello (^v^) can someone help me with this question?
Answer:sorry
Step-by-step explanation: i need points
Patricia tiene $80.000 sólo en billetes de $5.000, Camila tiene $60.000 sólo en billetes de $2.000 y Andrea tiene $120.000 sólo en billetes de $10.000. Cada una aportará la misma cantidad de dinero a un fondo para comprar un regalo a su madre, que tiene un valor de $90.000. ¿Con cuántos billetes se quedará Camila después de pagar su parte de la cuota?
Answer:
mmmm
Step-by-step explanation:
How long is the wire that supports the tree?
5.6 ft
3.3 ft
Answer:
6.5 ft
Step-by-step explanation:
You must use Pythagoras theorem, which is a² + b² = c², then square root c to get answer
if 5.6 = a and 3.3 = b
5.6²+3.3²=42.25(=c²)
42.25 = c²
square root both sides
6.5 = c
Answer:
6.5 ft.
Step-by-step explanation:
To find this you can use the Pythagorean Theorem. [tex]a^2+b^2=c^2[/tex]
[tex]5.6^2 + 3.3^2=C^2[/tex]
31.36+10.89=[tex]C^2[/tex]
42.25=[tex]C^2[/tex]
NOW you have to square root both sides of the equation
[tex]\sqrt{42.25} = \sqrt{C^2}[/tex]
You square root both sides so you can get ride of the exponent on C
So, your answer is 6.5=C
hope this helps :)
p.s. for further questions, [tex]c^2[/tex], is always the opposite side of the right angle. :)
Tyler will dog sit for a fee of $16 then $4 for each hour, Katie will dog sit for a fee of $12 then $6 per hour. After how many hours (x) will Tyler and Katie charge the same amount (y)?
can you tell me the steps to follow in order to solve this plz.
Answer:
4 hours
Step-by-step explanation:
Because 12 by 8 =96$ and 16 by 6 is equal to 96 too
Please help!!!!!!!!!
Answer:
2
Step-by-step explanation:
The radical rule : [tex]\sqrt[3]{2^{3} }[/tex] = 2 when the number inside is greater than or equal to 0
CAN SOMEONE HELP ME, ILL GIVE BRAINIES AND PLEASE NO LINKS
A business owner receives a $5,000 loan with 13%
interest,charged at
the end of each year.
Write an expression to represent the amount owed, in dollars, after the
given number of years of making no payments.
1. after 1 year
2. after 2 years
3. after tyears
Answer:
Step-by-step explanation:
Given;
Loan = $5,000
Interest rate = 13% charged at the end of each year
Question 1. Expression to represent the amount owed, in dollars, after;
a. After 1 year.
Owed amount = Loan + accrued interest= $5000 + ( 13% * $5000 * 1 year )
= 5650
b. After 2 years.
Owed amount = Loan + accrued interest
= $5000 + ( 13% * $5000 * 2 years )
= $6300
c. After t years
Owed amount = Loan + accrued interest= $5000 + ( 13% * $5000 * t years )= $5000 + $650t
Question 2. Explain how to convince someone that your expression for t years is correct.
Amount owned= borrowed amount + accrued interest
Accrued interest = Interest rate per year * Loan amount * time in years ( for simple interest case )
Loan amount = $5000
Time = t years
Interest rate = 13% per year
Accrued interest = 13% * $5000 *t years= $650t
Amount owned will therefore be; = Loan amount + Accrued interest
= $5000 + $650t
pls help with this immediately!!! i’ll be marking brainiest to those with the correct answer. if u leave a link, have fun getting reported.
Answer: A C E RECTANGLE QUADRILATERAL PARELLELOGRAM
Step-by-step explanation:
Can someone help me please
I’ll give brainiest
Answer:
$40
Step-by-step explanation:
5(*4)/12(*4)=20/48
If 20/48 of them had 2.00 tips then multiply 20*2= $40
How many??
Please help!!
Answer:
Step-by-step explanation:
HELP ME PLEASE DUE NOW 4. From last night to this
morning, the temperature
rose 18°F. The temperature
this morning was 54°F.
Let
tequal the temperature last
night. Write and solve an
equation for the
temperature last night.
Answer:
36 degrees
Step-by-step explanation:
Ok so wouldnt you have to subtract 54 minus 18? and if so then
2. If all the letters in the word ENVELOPE are randomly rearranged, what is the probability the letters will
spell the word ENVELOPE?
A.
3/28
B.
1/720
c.
1/1120
D.
1/6720
The probability the letters will spell the word ENVELOPE is 1/6720 option (D) 1/6720 is correct.
What is probability?It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.
We have:
If all the letters in the word ENVELOPE are randomly rearranged,
As we know, a permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.
From the definition of the permutation and combination we can calculate the total number of arrangements:
E :: 3
N :: 1
V :: 1
L :: 1
O :: 1
P :: 1
The arrangement Letters:
E,L,N,O,P,V
Total Number of Letters:
8
Total Number of Unique Letters:
6
Total arrangements = 8!/3!
Total arrangements = 8×7×6×5×4
Arrangements = 6720
Total number of outcomes = 6720
Number of favorable outcomes = 1
Probability = 1/6720
Thus, the probability the letters will spell the word ENVELOPE is 1/6720 option (D) 1/6720 is correct.
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HELPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEE
Answer:
angle KJG = angle FGJ (by alternateinteriorangle)
If the diameter of a circle is 16 cm, find it’s radius
Answer:
radius is 8cm
Step-by-step explanation: radius is half of diameter so 16/2= 8
Question
If the diameter of a circle is 16 cm, find it’s radius
soln'
diameter of circle=16cm
radius=?
now
radius formula=2 pie r where pie = 22/7
2*22/7*16
=96
Using the information in the Box-and-Whisker plot below, what is the 1st
Quartile?
A) 5
B) 12.5
OC) 20
OD) 27.5
Answer:
B. 12.5
Step-by-step explanation:
where the box ends on the left side is the 1st quartile.
Find the value of w in the triangle.
x
1359
770
Answer:
Multiply each le and divde from the one on the left
Step-by-step explanation:
Answer:
58
Step-by-step explanation:
180-135= 45
45 + 77 = 122
180 -122 = 58
By how much would the quantity of labor demanded decrease if a minimum wage hike raised prevailing wages from $8 to $10 an hour and if the elasticity of labor demand were 0.40?
Answer:
it would decrease by 10%
Step-by-step explanation:
Price elasticity of demand measures the responsiveness of quantity demanded to changes in price of the good.
Price elasticity of demand = percentage change in quantity demanded / percentage change in price
percentage change in price = ($10 - $8) / $8 = 0.25 x 100 = 25%
0.4 = percentage change in quantity demanded / 25%
percentage change in quantity demanded = 25% x 0.4 = 10%
Which value of x satisfies the inequality below?
13< x
Answer:
20
Step-by-step explanation:
since the sign is pointing to the "greater number"
any number over 13 is fine
The value of x can be 14, 15, .... and so on.
What is Inequality?Mathematical expressions with inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.
For example, In the 12U Softball division, Olivia gets chosen. What is Olivia's age? Olivia's age is unknown to you because the word "equals" is missing. However, since you are aware that she should be under or equal to 12, you can write Olivia's Age ≤ 12. This is a real-world example of an inequality.
Given:
13< x
So, we have to choose the value which are greater than 13.
The value of x cannot be 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13.
Thus, the value of x can be satisfies by 14, 15, .... and so on.
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What is the area of the top desk?
Answer:
i think its 832 im not for sure
Step-by-step explanation:
please answer this one if you could
What is the range for the graph shown? A) -3 ≤ y ≤ 2 B) -3 and 2 C) -3 ≤ y ≤ 3 D) -2 ≤ y ≤ 3
Helppppppppppplszzzz
Answer:
3x=15
Step-by-step explanation:
3(5)=15 it's the only one where x can be 5
PLEASE HELP. NO LINKS. (LINKS WILL BE REPORTED.) NEED REAL EXPLANATION ALONG WITH THE CORRECT ANSWER CHOICE OR CHOICES.
Answer:
False true true true
Step-by-step explanation:
So sorry for the rough sketch but that is how it will reflect
PLEASE HELP ! me last question
Answer:
So sorry but I have no idea, also have a great weekend!