Respuesta :
Answer:
[tex] \huge \colorbox{red}{ \boxed{ \blue{ \sf}{c.16}}}[/tex]
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