8x-9y=19 4x+y=-7 How Do I Do This Type Of Math

Claire buys lunch for 25 dollars and dessert for 10 dollars. Sales tax is 8%. How much does Claire actually have to pay?

An item was increased by 20% but then decreased by 25%. Calculate the percentage change and state if it was an increase or decrease.

There are 5 sodas, 3 grape sodas, 7 root beers, and 8 lemon lime sodas in a cooler. What is the probability of choosing a grape soda? Give your answer as a ration in its lowest terms.

A bag contains 13 cards numbered 1 through 13. A card is randomly chosen from the bag. What is the probability that the card has a multiple of 3 on it? Write answer as a fraction

4x minus 5=2 (2x plus 1)

Which word problem can best be represented by the fraction 5-8

The price of a car is usally £12,500 it is reduce to £11,625 what is the percentage of the reduction

An expression is shown as 3•3•3•3•3 answer for this and Part A: an equivalent form of the expression is given as, where a is constant. What is the value of a 3^a Part B:what is the simplified value of the given expression

A city is in the shape of a rectangle. in 1995 the width of the city was 5 miles and the length of the city was 7 miles. the width of the city is growing at a rate of 1 mile in 8 years.

Compare how you would model and record finding the sum and difference of two rocks weighing 2/8 pound and 3/8 pound.