We need to know the schedules . . . How often does each shuttle run ?
Answer:
X=132-13A/A, A cannot equal 0
A=132/X+13, X cannot equal -13
Answer: 2
-7 - (-9) could be visualized as -7 + 9
-7 + 9 is 2
Answer:
49/4
Step-by-step explanation:
x^2 + 7x = 4
Take the coefficient of x
7
Divide by 2
7/2
Square it
(7/2) ^2 = 49/4
Add this to each side
x^2 + 7x +49/4= 4+49/4
