Blake and three friends meet for lunch. his friends all get the same thing, but blake gets a different lunch that costs $6. write an expression to show the total amount that blake and his friends spend. then find the total amount that lake and his friends spend if each friend spends $8.

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?

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.