Answer:
9
Step-by-step explanation:
You choose the middle one because 3<(4)<10 makes sense where as the other ones don't when you plug in 4. Then you solve the equation which is x^2-7 and then you get 16-7 which is 9.
a=2
3(3a+2)+6=30
9a+6+6=30
9a+12=30
9a=18
450
Step 1:
18 × 25 = 450
Hope This Helps :)
