(e) The price of a block of mahogany, given that a block of spruce costs 5 as much as a block of 9 mahogany, and Ted has bought 12 blocks of spruce and 15 blocks of mahogany for a total cost of $9750.

The equation given is

C(dollars)=w(blocks of spruce)y(cost of spruce)+x(mahogany)z(cost of mahogany)

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

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?

The table shows the age and finish time of ten runners in a half marathon. identify the outlier in this data set. drag into the table the ordered pair of the outlier and a reason why that point is an outlier.