Chapter 3

x + 5 - 3x - 6

-2x - 1

3(2x - 5y) (x=3 & y=4)

-42

x + 3y (x=3 & y=4)

15

3q^2 x 5q

15q^3

3x + 2y (x=3 & y=4)

17

Mr. Turner bought x boxes of pencils. Each box holds 25 pencils. He left 3 boxes of pencils at home and took the rest to school. What expression represents the total number of pencils he took to school?

25x - 75

d + d - (a + a + a + a)

2d - 4a

k + k - 3 x d x d x d

2k - 3d^3

6x^4y^3/3x^2y

2x^2y^2

-y - -3y

2y

3^2 x 3^3

3^5

r + r + r + s + s

3r + 2s

3 x (r + s) (distributive property)

3r + 3s

3 + 4r (coefficient)

4

p^2 + q^2 - 5pq + 17 (number of terms)

4

(4 x k) + (m x 3)

4k + 3m

5^4/ 5^1

5^3

4a - 3b + - a -4b

5a - 7b

5a^3/a

5a^2

2b^2 x 3a^2b^3

6a^2b^5

2a x 3b

6ab

t x 6s

6st

5y - -2y

7y

8 x b x b x a x a x a

8a^3b^2

Twice a number less than nine

9 - 2x

Constant

A term which does not contain a variable

add, sum, more than, exceeds, in all, total, gain, plus

Addition

Terms

Algebraic forms which are separated by + or - signs, the signs being included.

Equation

An algebraic for which contains an = sign.

Expression

An algebraic form consisting of numbers, variables, and operation signs.

Variable

An unknown value that is represented by a letter or symbol.

divide, quotient, divided equally, per, ratio of

Division

-2a, -30a (like or unlike terms)

Like terms

multiplied by, of, product, times, double, twice, triple

Multiplication

subtract, difference, less than, decreased by, diminished by, minus, fewer, reduced

Subtraction

Coefficient

The number factor of an algebraic term ( number in front of a letter).

-2x^2, 100a (like or unlike terms)

Unlike terms

b x a - c

ab - c

x/2 = 6/x (equation or expression)

equation

x^2 + 7x +10 (equation or expression)

expression

p x q + r

pq + r

Like terms

terms with exactly the same variable factors (same letter, same exponent).

Ten more runs than the Yankees.

x + 10

2 + x + 4

x + 6

The quotient of a number and fifteen.

x/15