If y varies directly with x and y equals 35 when x equals 5 find x when y equals -7

y varies directly with x means y = kx, where k is the constant value. To find x when y = -7 first we have to find k, using y = 35 and x = 5

y = kx

35 = k(5)

35/5 = k

k = 7

Find x when y = -7. Remember k is constant and it stays 7.

y = 7x

-7 = 7x

-7/7 = x

x = -1

x = -1 when y = -7

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.