Olivia's bill comes to $77.50 and she leaves a 15% tip a. How much will the tip be?
b. What will be the total bill including tip?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Prove that quadrilateral is a rhombus.

These box plots show the number of electoral votes one by democratic and republican presidential candidates for the elections from 1984 through 2012. which statement best compares the spread of the data sets