How to simplify?

2a - 4b - 16 + (3a + 7) - 8

A county has an area of 215 square miles if the population density is 34.5 people per square mile what is the population

Which of the following is the inverse of y=3x

Which has the greater mass a 1 kilogram brick or a 1 kilogram bag of leaves

In ΔABC, m∠ACB = 90°, CD ⊥ AB and m∠ACD = 45°. Find AC, if CD = 6 sqrt 2

Choose the integer that represent a deposit of 20$

Olivia needed 2 quarters of a cup water for flower 1. If she had nine flowers how many cups would she need?

Two expressions set equal to each other creates an what?

In a certain card game, For every four blue cards, there are three yellow cards. There are a total of 84 blue and yellow cards in the game how many blue cards are in the game

How do I write 4/9 plus 3/5 multiplied by 6

Mrs. gauthier plans to take her class on 2 field trips this year there are 23 students in her class and each field trip will cost $5 per student use mental math to find the total cost for both field trips