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Solnce55 [7]
3 years ago
9

A painter charges $15.36 per hour, plus an additional amount for the supplies. If he made $187.93 on a job where he worked 7 hou

rs, how much did the supplies cost
Mathematics
1 answer:
mario62 [17]3 years ago
3 0

Answer:

15.36×7=107.52

187.93-107.52=80.41

supplies cost $80.41

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A unit rate is a ratio that compares an amount of one quantity to _______________ unit of another quantity.
masya89 [10]

Answer:

one

Step-by-step explanation:

A unit rate compares a quantity to one unit of measure.

6 0
2 years ago
Solve for x:<br><br> 2.5x - 10.5 = 64 (0.5) ^x
Andreyy89
The answer is x=5. This is because you need to simplify both sides and then isolate the variable.
6 0
2 years ago
Help me pls !!!<br><br> answer all pls
polet [3.4K]
1. We assume, that the number 128 is 100% - because it's the output value of the task. 
<span>2. We assume, that x is the value we are looking for. </span>
<span>3. If 128 is 100%, so we can write it down as 128=100%. </span>
<span>4. We know, that x is 51% of the output value, so we can write it down as x=51%. </span>
5. Now we have two simple equations:
1) 128=100%
2) x=51%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
128/x=100%/51%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 51% of 128

128/x=100/51
<span>(128/x)*x=(100/51)*x       - </span>we multiply both sides of the equation by x
<span>128=1.96078431373*x       - </span>we divide both sides of the equation by (1.96078431373) to get x
<span>128/1.96078431373=x </span>
<span>65.28=x </span>
x=65.28

<span>now we have: </span>
<span>51% of 128=65.28</span>
8 0
3 years ago
A line passes through (-1,7)and(2, 10)
kumpel [21]
Slope
m = (y2-y1)/(x2-x1)
m = (10 - 7)/(2 --1)
m = 3/3
m = 1

To find the equation
y = mx + b
m is slope
y = 1x + b
plug in one of the equations to solve for b
10 = 1(2) + b
10 = 2 + b
subtract 2 from both sides
8 = b

The equation is 
y = 1x + 8
or you can write it as
y = x + 8

Hope this helps
3 0
2 years ago
Prove that<br> cos^4∆ - sin^4∆ = 2cos^2∆ - 1
GarryVolchara [31]

\cos^{4} x-\sin^{4} x\\\\=(\cos^{2} x+\sin^{2} x)(\cos^{2} x-\sin^{2} x)\\\\=\cos^{2} x-\sin^{2} x\\\\=\cos^{2} x-(1-\cos^{2} x)\\\\=2\cos^{2} x-1

3 0
1 year ago
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