In 2 hours (x) Frank earned $31(y)
In 4 hours he earned $62

1 mph

step-by-step explanation:

if the question is asking how much does she drive per mile then,

13 / 13 = 1 mph

first, let's see what the pattern is.

58 - x = 47

46 - x = 36

x = 9

so this means that the term after 25 is 25 - 9:

the next term in the sequence is 16.

the answer is 9 because the question is telling how much it be together.