Answer:
-12
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
3 - 7x + 2x
x = 3
Step 2: Evaluate
Substitute in x: 3 - 7(3) + 2(3)Multiply: 3 - 21 + 6Subtract: -18 + 6Add: -12Answer:
if x is 3 then
3-7(3)+2(3)
-18+6
-12 done
Write the slope-intercept form of the equation of the line described.
5. through (-2,-3), perp. to y=2x+2
Answer:
its not showing up on mine
Solve problem in photo 8th math
i dont under stand this
Answer:
13
Step-by-step explanation:
a^2 + b^2 = c^2
Plug 5 and 12 for a and b respectively. then solve
Also its a special 5 12 13 triangle.
please show work
A car travels 360 miles in 8 hours (with a constant speed). How much time will it take traveling 168 miles?
Answer:
3.7hours
Step-by-step explanation:
Step one:
A car travels 360 miles in 8 hours
the speed is calculated as
speed= distance/time
speed= 360/8
speed= 45mph
Step two:
How much time will it take traveling 168 miles?
having found the speed, which is the rate at which the car is tavelling
time= distance/speed
time= 168/45
time= 3.7hours
Helppppppppppppppppppp me Write this rate as a unit rate. 7/5 miles 2/3 hour
Julie is planning to make cupcakes for her school bake sale. There are 285 students, 17 teachers, and 324 parents attending the bake sale. If she decides to make a cupcake for each person, how many cupcakes does she need to make?
Answer:
Step-by-step explanation:
Julie is planning to make cupcakes for her school bake sale. There are 285 students, 17 teachers, and 324 parents attending the bake sale. If she decides to make a cupcake for each person, how many cupcakes does she need to make?
1 cup cake per person
Hence: total number of cupcakes
= 285 + 17 + 324
626 cup cakes
What is the y-intercept of the equation?
Answer:
5
Step-by-step explanation:
Y=-3x+5
. The units sold follows the equation U = 10000 – 2000P. The money from sales is equal to the units sold times the price P of the unit. Write an equation for sales as a function of price.
Given:
The units sold follows the equation
[tex]U = 10000-2000P[/tex]
To find:
An equation for sales as a function of price.
Solution:
Let S represents the sales function.
We know that, the money from sales is equal to the units sold times the price P of the unit.
[tex]S=U\times P[/tex]
[tex]S=(10000-2000P)\times P[/tex]
Using distributive property, we get
[tex]S=10000P-2000P^2[/tex]
Therefore, the equation for sales as a function of price is [tex]S=10000P-2000P^2[/tex].
The local furniture store pays $110 for a chest
of drawers and sells it with a 40% markup.
What is the selling price of the chest of
drawers?
Answer:
$154
Step-by-step explanation:
Find the selling price by finding the cost with the 40% markup:
Multiply 110 by 1.4:
110(1.4)
= 154
So, the selling price is $154
Answer:lol
Step-by-step explanation:I still don’t know
A farm has chickens and horses. All the horses have 4 legs and all the chickens have 2 legs. All together, there are 94 horses and chicken legs on the farm. Complete the table to show some possible combinations of chickens and horses to get 94 total legs.
number of chickens (x) number of horses (y)
35
7
10
19
5
Answer:
bears beets battlestar galactica
Step-by-step explanation:
Answer:
37x 5y
Step-by-step explanation:
37×2= 74 and 5×4 is 20 (74 +20)= 94
Hi whats
u = x - k solve for x
Answer:
x=u+k
Step-by-step explanation:
Answer:
x = k+u
Step-by-step explanation:
u = x - k
+k +k
u + k = x
Hope this helps!
can someone plz help me
Answer:
I think B
Step-by-step explanation:
I think
Answer:
The equation has no solution.
Step-by-step explanation:
[tex]2(3x - 8) = 8x - 2x - 8 \\ \\ 2 \times 3x - 2 \times 8 = 6x - 8 \\ \\ 6x - 16 = 6x - 8 \\ \\ 6x - 6x = 16 - 8 \\ \\ 0 = 8 \: (which \: is \: absurd) \\ \\ the \: equation \: has \: no \: solution \\ [/tex]
On a test that has a normal distribution, a score of 41 falls three standard deviations below the mean, and a score of 73 falls one standard deviation above the mean. Determine the mean of this test.
Answer:
The mean of the test is 65
Step-by-step explanation:
Let the mean be x and SD be y
3 SD BELOW the mean means that we are taking away 3 SD FROM the mean
Mathematically, we have that as;
x - 3y = 41 •••••(i)
73 is 1 SD above mean
Mathematically;
x + y = 73 ••••••••(ii)
So let us solve both equations simultaneously
Simply multiply equation ii by 3 then add to i
x - 3y = 41
3x + 3y =219
4x = 41 + 219
4x = 260
x = 260/4
x = 65
Answer:
its actually 35
Step-by-step explanation:
Find the equation in slope-intercept form that passes through the points (9, 3) and (19, -17).
Answer:
y=-2x+21
Step-by-step explanation:
use y2-y1/x2-x1 to find the slope so= -17-3/19-9=-20/10=-2
so once you find the slope take one of the points and plug it into the slope-int equation so... if you take (9,3) and take your slope (-2) so it would be: 3=-2(9)+b solve for b to get 21=b as your int. so.. y=-2x+21
Describe the transformation.
* Dilation with a scale factor of 1⁄2
* Dilation with a scale factor of 2
* Dilation with a scale factor of 3
* Dilation with a scale factor of 4
* none of the above
Answer:
Dilation with a scale factor of 2
Answer:
* Dilation with a scale factor of 2
Step-by-step explanation:
B is my answer
I need help please #22
Answer:
8 because u need to divide 40 by 5
pls help again lolll srry :((
Answer: 9
Step-by-step explanation:
In Ms. Miller's class there are 18 girls and 10 boys. Find the ratio of boys to girls. ASAPP plssss
Answer:
10:18
Step-by-step explanation:
PLEASEE I REALLY NEED HELp Plus 30 coins
Brainlist too
For each question, solve for the length of the unknown side, as
denoted by the variable. You may round your answers to the nearest
tenth, if necessary. Make sure you show all steps needed to solve the
problem.
Answers (in order):
I used the Pythagorean Theorem to solve each one:
[tex]h=13[/tex]
[tex]l=9[/tex]
d ≈ 8.0622
l ≈ 6.7082
Hope this helps! :)
Complete the latter: 1, 5, 9, 13.
Answer:
17
Step-by-step explanation:
Answer:
17
Step-by-step explanation:
The answer is 17 because We noticed that 5 is 4 more than 1, 9 is 4 more than 5, and 13 is 4 more than 9. They are all a +4 pattern so you just simply add 4 to 13 which is 13 + 4 + 17 So our answer is 17
Can someone help on doing these plz if you know them ?
Answer:
8. 3
9. 1.6
10. -5
hope that helps
Answer:
Step-by-step explanation:
8. x = 3
9. g = 1.6
10. d = -5
Which is larger the fraction 8/10 or 0.25
0.25
They are equal
8/10
Answer:
8/10
Explanation:
math
what changes in a wave to make a sound high pitch or low pitch?
Answer:
Volume is dependent on how hard the air is pushed through. Sound travels more slowly than light. Sound waves travel at the same speed, but vibrate in different ways. Some vibrate quickly and have a high frequency or pitch, while others vibrate slowly and give a lower pitch.
Step-by-step explanation:
I hope this helps :)
Select the ordered pair that is a solution of the system of linear equations.
y = 4x - 7
y = -x +3
o (1,2)
o (2,1)
o (1,1)
o (2,2)
Answer:
the ordered pair will be (1, 2)
Step-by-step explanation:
first of all substitute the x and y values into the equation in other to make the equation true.
Therefore y=4x-7
1 = 4(2) -7
1 = 8 -7
1 = 1
Making the first equation true. then move to the second equation which is y = - x + 3
1 = -(2) + 3
1 = 1
I hope this helps though
Please answer correctly !!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!
Answer:The ratio is 1:5
Step-by-step explanation:
Answer:
it is 1:5 because if you divide both sides by 4, you get 1:5
Step-by-step explanation:
Which of the ratios below is equivalent to 2:1? Select all that apply.
A) 6:4
B) 8:4
C) 10:5
D) 6:12
E) 6:3
What is the value of x in the equation 3x - 1/9y = 18, when y = 27?
Answer:
x=7
Step-by-step explanation:
PLEASE HELP ....ITS DUE TODAY!!
Answer:
B- (-5, -6)
Step-by-step explanation:
By looking on the graph, if you were to reflect this point across the x-axis if will fall under point (-5, -6)
I hope this helps! If not I'm so sorry! Have a lovely day.
Which algebraic expression represents a number divided by 2?
Answer: x/2
Step-by-step explanation:
A unknown number can be represented by a variable (‘x’ in this case) and the unknown number (x) is being divided by 2, therefore its x/2
for an acute angle 0, the equation sin(0) the equation sin(0) = cos(6) is true. What is the value of 0?