how can i do this

Question

when does the graph od y=2x+5 and y=3x+1 intersect ?

 

when x is 3

when x is 7

 

when x is 4

 

when x is 13

 

 

the walkathon pledge plan for  mason is represented as a =31 +3k how many kilometers did mason walk to collect 52 dolllars

 

 

 

Answer 1

y=2x+5

y=3x+1

2x+5=3x+1

5-1=3x-2x

4=x

when x is 4  (answer)

 

a=31+3k

52=31+3k

52-31=3k

21=3k

k=7 kilometers