SOLUTION: Evaluate the expressions if x = -2, y = 5, and z = -2: -5(-3y

SOLUTION: Evaluate the expressions if x = -2, y = 5, and z = -2: -5(-3y - 2z)

Question 73895: Evaluate the expressions if x = -2, y = 5, and z = -2: -5(-3y - 2z)
Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
Evaluate the function:
.
-5(-3y - 2z)
.
Given that x = -2 y = 5 z= -2
.
For each of the letters in the function, plug in its corresponding value. When you do,
the function becomes:
.
-5(-3(5) - 2(-2))
.
Notice that there is no x term in the function so you don't do anything with the fact that
x = -2.
.
Do the multiplications inside the parentheses first. -3(5) = -15 and -2(-2) = +2.
Substitute those values to get:
.
-5(-15 + 4)
.
Add the -15 and +4 to get -11. Substitute this:
.
-5(-11)
.
Now multiply to get the answer of +55
.
That's the answer to the problem. Hope that you follow this all the way through so that
you get the idea of how to evaluate an expression when you are given the values for the
variables in that expression.
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