You answer will be B, as the graph increases 5 miles per hour
To model half-life, use the formula

. Here,

is the amount remaining after a length of time

.

is the amount that you start with.

is the half-life. You plug in 50 for

, 10 for

, and 25 for

. You get

.
Step-by-step explanation:
r - 18 = 27
r = 27 + 18
r = 45
...
Answer:
a. (5x-2)-(2x+1)
b. 3x-3
c.39
Step-by-step explanation:
The answer is 13 … just minus 17-4 and it will equal 13