Answer:
348
Step-by-step explanation:
x + x + 4 = 20
x + x = 16
16 / 2 = 8
Mike is 8, and Mark is 12.
14th square number = 196
6th square number = 36
Answer:
3x-1
Step-by-step explanation:
3(x-2)+5
3 multiplied by x is 3x
3 multiplied by -2 is -6
So you get 3x-6+5, add -6 and 5 to get -1
and you'll have 3x-1