Since there is a sales tax of 6% which was equal to $820
Let the value be = x
6% of x = 820
(6/100)x = 820
0.06x = 820
x = 820/0.06
x = 13666.67
Value to the nearest dollar ≈ $13 666.67
The correct equation is 8.7 + b = 54.6
because it is given that measure of side a is 8.7cm, in all other equations the values of a is different.
from the first equation we can find the value of b, that is
b = 54.6 - 8.7 = 45.9
so, value of b is 45.9cm
It will take approximately 13 seconds.
