Answer:
A. Vasily is not correct. He should have rewritten the original expression as −6(−5g−7h+9) and then as 30g+42h−54.
Step-by-step explanation:
Given the expression;

<em>Rearranging the above, we have;</em>

<em>Simplifying, we have;</em>

<em>Multiply, to open the bracket;</em>

<em>Therefore, Vasily should have rewritten the original expression as −6(−5g−7h+9) and then as 30g+42h−54. </em>
Answer:
8 hours
$480
Step-by-step explanation:
Let us assume the hours be x
There should be two equations
For Plumber A = 60x
For Plumber B = 40 + 55x
Now in order to considered the cost to be the same we equate these two equations
60x = 40 + 55x
5x = 40
x = 8 hours
Now the total cost for plumber A is
= 480
And, the total cost for plumber B is
= 40 + 55(8)
= 480
hence, the total cost is $480
usually you can just have the area of the cross section multiply by the perpendicular height, but it depends on the shape. what shape are you looking to find the volume for?
Answer:
LLLLLLLLLLLLLLL
Step-by-step explanation: