9th grade MATH
posted by Keila on .
The sum of 14 and twice a number y is equal to 78 ?

14 + 2y = 78
78  14 = 64
2y = 64
64 / 2 = 32
y = 32 
Thanks

14+2y=78
14 14
__________
2y=64
_ _
2 2
y=32 
a sales person drove 215 miles frpm new york to washington DC in 4.5 hours what is her average speed?

Dfrom point a to point b=215miles
VELOCITYaverage=change in distance/change in time
=215miles/4.5hrs
Approx.=47.8 or 48mph