Answer:
76 seconds
Step-by-step explanation:
You need to find the first common multiple of both 7 and 8. the LCM is actually the numbers multiplies by each other, or 56.
10) C
11) A
a= -3, b= 4 and c= -5
ab + c = (-3)4+(-5) = -12 -5 = -17
10.9