21. A plumber charges a flat fee plus a cost per hour. Customer 1 is charged $114 for a job that takes 3 hours. Customer 2 is charged $170 for a job that takes 51
hours. What is the cost for a job that takes 8 hours?
A. $198
B. $254
c. $284
D. $840

B. $254

Step-by-step explanation:

Flat Fee: $30    

Cost per hour: $28

Customer 1: 3(28) + 30 = 114

Customer 2: 5(28) + 30 = 170

Customer 3: 8(28) + 30 = 254

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!