Answer: 350
Step-by-step explanation: Let's say H is the number of hamburgers and C is the amount of cheeseburgers. H + C = 645. It says that there are 55 fewer cheeseburgers sold than hamburgers. So C = H - 55. If you substitute C for H - 55 your equation should look like
H - 55 + H = 645. Then you combine your H's, so the equation should be 2H - 55 = 645. Then you add 55 to both sides and you end up with 2H = 700. Divide by two and you get 350 for the amount of hamburgers sold.
To make sure you are correct you can plug in 350 for H and solve for C. So C = 295 and
295 + 350 = 645.
It'll take her 15 hours.
Formula: 975= 65x
Where x represents hours
if those are fractions being five and two thirds etc... I believe it would be 17/6. if you convert to improper fractions and then get a common denominator to subtract that should do it. Hope that helps.
Answer:
x > 9
Step-by-step explanation:
6x + 9 < 7x .
-6x -6x <---- Subtract 6x from both sides.
9 < x <----- 7x - 6x = 1x (which can also be written as just x)
Therefore the answer is x > 9.