Homework 3.1
1. Label the following parts.
Math
Sentence
5x = 40
Equation,
Variables Coefficients Constants # of Terms Expression, or
Inequality?
x
5
40
2
equation
12 + y > 13
y
1
12, 13
3
inequality
3k – x + 9
k, x
3, −1
9
3
expression
w + (–6) = 7
w
1
−6, 7
3
equation
–10 + 3x – x
x
3, −1
−10
3
expression
2. Identify the terms, variables, coefficients, and constants in each expression.
3) –5a – 7 + 5d + h
4) 7m – 5 – n – 8k
Terms: –5a, –7, 5d, h
keep the signs!
Terms:
Variables:
letters only
Variables:
keep the signs!
Coefficients:
keep the signs!
Constants:
a, d, h
Coefficients: –5, 5, 1
Constants:
–7
Tell whether the following phrases are expressions, equations, or inequalities. Circle the key symbol.
1
𝑥<2
5) 5x = 25 – 3x
equation
6)
7) 29 – k ≥ -5
inequality
8) 8b + 9c + 45 expression
2
inequality
9) A sentence containing the symbol < is called a(n) _ inequality ___.
10) Expressions that represent repeated multiplication are called _exponents___.
11) An integer and its opposite are _additive inverses___.
12) What is the multiplicative inverse of 5?
𝟏
𝟓