The jackson and the simpsons were competing in the final leg of the amazing race which was 240 kilometers long. in the race to the finish , the jackson immediately took off traveling at and average speed of v kilometers per hour the simpsons start was delayed by an hour . when they eventually took off , they traveled at an average speed that was 40 kilometers per hour faster than the jacksons speed . sadly for them , that didn't , and the jackson won

The last one hope it works

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

C. a,b, and d are not numbers. they are expressions.