Page 37 - Math Course 1 (Book 1)
P. 37
Dividing Integers
Let’s Begin
Evaluate Algebraic Expressions
Your Turn!
Examples Evaluate Algebraic Expressions
Evaluate 6x ÷ y, if x = –4 and y = –8. Evaluate –4m ÷ n if m = –9 and n = –3.
A. –12
6x ÷ y = 6(–4) ÷ (–8) B. –16
C. 12
= –24 ÷ (–8) D. 33
= 3
Answer 3 Answer
REAL WORLD EXAMPLE
EXAM SCORE EXAM SCORE
Ian had exam scores of 89, 98, Poom has taken 5 of 6 tests in his English class this
96, 97, and 95. term, and he has an average of exactly 78 points.
How many points does he need to earn on the 6th
Find the mean (average) of his test to bring his average score up to exactly 80
exam scores. points?
A. 90
B. 88
89 + 98 + 96 + 97 + 95 = 475 Find the sum of the C. 82
5 5 quiz scores. Divide D. 80
by the number (of
exams) in the set. Answer
= 95 Simplify.
Answer The average of Ian’s score is 95
29
