Solve the problem.In one state, speeding fines are determined by the formula F=8(x-65)+100 where F is the cost

Question

the formula F=8(x-65)+100 where F is the cost, in dollars, of the fine if a person is caught driving x miles per hour. If the fine comes to $292, how fast was the person driving?

Answer 1

Way too fast.
Substitute 292 for F
subtract 100 from both sides
divide the remainder of F by 8
add the answer of that to 65

Lets just say it was over 80

Answer 2

292=8x-520+100
(expand the bracket by multiplying)

Therefore, 292 =8x-420
(move -420 to left hand side which turns to +420)

292+420=8x
712=8x
(divide by 8 to get x alone)

712/8=x
89=x (remember to put per hour or else you will lose marks)

To see whether this is correct, put this value into the formula)

so, F=8(89-65)+100
work out the bracket first (89-65) is 24 multiply it by 8 gives you 192 then + 100 gives you 292.

Answer 3

F =8(x-65)+100
292=8(x-65)+100
192=8(x-65)
divide both sides by 8
24=x-65
add 65 to both sides
89=x
89mph

Answer 4

previous the line the shrink is composed of the provision of stepped forward existence help and for regulation enforcement to supervise crash web content. 75 mph is plenty greater survivable than eighty mph, which in turn is plenty greater survivable than eighty 5 mph. At one hundred mph in basic terms approximately all injuries are fatalities, which (from a regulatory attitude) can tie up officers and close down the line for 0.5 an afternoon. At a hundred and twenty mph, see the video interior the 1st source. autos could be designed for a optimal impact velocity, the linked fee at which the give way zones are exhausted and the restraints have accomplished all they'd. interior the Nineteen Seventies it became into ordinary the "candy spot" for optimal impact velocity for passenger autos became into approximately eighty mph. via that velocity fatalities are person-friendly besides so it did no longer remember if the vehicles have been designed for ninety mph. velocity limits reflect the jurisdiction's willingness to handle the carnage from bigger speeds. 70 mph is tremendously secure, eighty mph is soliciting for worry. ninety mph is in basic terms undeniable stupid.

Answer 5

292=8(x-65)+100
192=8(x-65)
24=x-65
89=x


89 miles per hour

Answer 6

In that case

x = 89 mph

Answer 7

89 mph

This is a math problem why are you asking it here?

Answer 8

Huuuh, yeah, what them other guys said. . .