A shop is having a sale. all items are reduced by 25%. Work out the sale price of an item normally priced at £90 ?

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps