Does the expression 2b+5b have like terms

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. after tax the total is 45.99. what percentage of the subtotal is the total?

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.