Chloe paid $21.18 for a large pizza including tax and delivery fees. She gave the delivery person $25 and told the delivery person to keep the change. Did she give the delivery person a 20% tip?
Explain.

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of