A repairman charges $50.25 per visit plus $35.50 per hour. For how many hours did the repairman work if the total bill was $210.00? HELP ME MATE RIGHT NOW I AM HAVING A TEST.

5.8 hours

Step-by-step explanation:

50.25x + 35.50y = 210.00

50.25x = -35.50y + 210.00

x = (-35.50y+210.00)/50.25

50.25((-35.50y+210)/50.25) + 35.50y = 210

-1783.875y + 10552.5 = 210

-1783.875y = -10342.5

y = 5.797771705

step-by-step explanation:

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1