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Answer:
A) 16
Step-by-step explanation:
The question is:
Evaluate the expression using the given value of the variable.
when 
A) 16
B) -24
C) -18
D) 28
Solution:
Given expression:

Plugging in
in the expression
⇒ 
⇒ 
⇒ 
So the expression evaluates to 16 when we put 
Answer: the second one
Step-by-step explanation:
Answer:
1 / 5
Step-by-step explanation:
5 / 7 of x is 1 / 7
( 5 / 7 ) * x = 1 / 7
x = ( 1 / 7 ) * ( 7 / 5 )
= ( 1 * 7 ) / ( 7 * 5 )
x = 1 / 5