Select all of the following for which there exist nonzero constants which can be substituted into the equation to make it true.
a) a/(x-2)(x+7)=b/(x-2)

b) a/(x-2)(x+7)=b/(x-2)+c/(x+7)

c) a/(x-2)(x+7)=b/(x-2)+c/(x+7)+6

d) none of the above?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

What term makes it inconsistent y=2x - 4