Answer:
√{21×1/21}=√1=1 is your answer
1
Step-by-step explanation:
Evaluate the interior of the square root first and work your way outwards:
y+6y-2= -12
7y-2 = -12-2
7y. = -14
7y/7y = -14/7y
y = -2
-5x+-3x
-8x-2-2= -12
-8x -4= -12-4
-8x = -16
-8x/-8x = -16/-8x
x = -2
he can go 500 miles