Expression Basics

Add 8xy , 15xy and 3xy

• 17x

• 2y

• 26xy

• 11yx

3a + 2b - 4c and 2c - 5b + 8a

• 4a + 17b - 3c

• a - 12b + 6c

• 11a - 3b - 2c

Add: 4x²+3xy-8y² , 2xy - 6x² +7y² and y² - xy+5x²

Subtract 8a from 15a

• 2a

• 7a

• 13a

• 9z

5 times a number, minus 8  

• 5m - 8

• 5(m + 8)

• 8m + 5

• 8(m + 5)

Simplify 2(a + 1) - (a + 2).

• 3a + 3

• a - 1

• a + 4

• a

• None of the above

____ is a type of mathematics that uses letters to represent numbers.

a mathematical phrase with numbers, variables, and operators

Answer: ​ (a)  

• associative property

• commutative property

• composite

• distributive property

• equation

• equivalent

• expression

• identity property

• prime

• prime factorization

A store sells pens for $2 each and markers for $3 each. A pencil case costs $10.

How much would it cost, "c", to buy a pencil case, "p" number of pens, and "m" number of markers?

• c = 5pm + 10

• c = 2p + 3m + 10

• c = 3p + 2m + 10

• c = 15m

Simplify
2a + a

• 3a

• 2a

• 2a²