Question

If a + b = 7 and b=3, what is 4a
A. 20b
B. 17a
C. 16
D.20

Answer 1

c 16 because a is 4 and 4 times 4 is equal to 16

Answer 2

Answer:

$\huge \colorbox{red}{ \boxed{ \blue{ \sf}{c.16}}}$

Step-by-step explanation:

in this Question, you have to plug the value for b into a+b=7 in order to find a:

• a+b=7
• a+3=7
• a=4

once you know that a=4, just substitute into 4a:

• 4×4=16