Answer: 5040
Step-by-step explanation: There are 4 sides which is equal to 1260, 1260 x 4 = 5040
2(w-8) = 9. Hope it helps!
The third choice is very useful. It's valid because two things that are both equal to 'y' are equal to each other, and it can be easily solved to find 'x'.
-2x + 7y = 10 ⇒ -2x + 7y = 10
x - 3y = -3 ⇒ <u>-2x + 6y = 6 </u>
y = 4
-2x + 7(4) = 10
-2x + 28 = 10
<u> -28 -28</u>
<u>-2x</u> = <u>-18</u>
-2 -2
x = 9
(x, y) = (9, 4)
A volleyball uniform costs $13 for the shirt, $11 for pants, and $8 for socks. Write two equivalent expressions for the total cost of 12 uniforms. Then find the cost.
Write an expression for the cost of 1 uniform, add $13, $11 and $8 .
$13+$11+$8
Write an expression for the cost of 12 uniforms, multiply 12 by the cost of 1 uniform.
12($13+$11+$8)
Simplify using the distributive property.
=12⋅13+12⋅11+12⋅8=156+132+96
Now Add.
=384
So, the total cost of 12 uniforms is $384 .
