D. The solution is 35, which represents the number of miles she runs each week.
67 is a prime number, and its ones digit is two less than the tens digit.
Answer:
x=19
Step-by-step explanation:
The perimeter of the right triangle is
P=9+12+15 =36
The perimeter of the left triangle is
P =x-7+ x-7+ x-7 = 3x-21
Set them equal
36 = 3x-21
Add 21 to each side
36+21 = 3x-21+21
57 = 3x
Divide each side by 3
57/3 = 3x/3
19 =x
1) correct
2) -3
3) 15/7
4) -10
