Answer:
a(n-1)+d
d=5
The anser is A
2x+78=5x+15
78-15=5x-2x
3x=63
x=21
For the 1st one its...
y = 7x + 5.
For the 2nd one its...
Choice C: 32
For the 3rd its...
Choice A: 3/4
AB=24.5
Step-by-step explanation:
5x+7=7x
7=2x
x=3.5
7(3.5)=24.5