(x^2+5)=7 and (x^2+5)k=21, what is the value of k?

The bike store marks up the wholesale cost of all the bikes they sell by 30% and andre wants to buy a bike that has a price tag of 125 what was the wholesale cost of the bike

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300