Answer:
y=x+4
Step-by-step explanation:
The shapes are similar.
When two figures are similar, the ratios of the lengths of their corresponding sides are equal.
Therefore,

Simplify:

Cross multiply:
42(10+x) = 57x
420 + 42x = 57x
420 = 57x - 42x
420 = 15x
x = (420÷15)
x = 28
After 1 hour he has driven 40 miles
Answer:
Step-by-step explanation:
x=1
y= -2
See step by step explanation below: