5
QuizMultiple Choice

Expanding Expressions — Quiz

Question 5 • Grade 7 Mathematics

Which expression is equivalent to 1 fifth times open paren 150 x minus 80 y plus 50 minus 50 x minus 25 y plus 20 close paren ?

Answer
A
20 x minus 21 y plus 14
B
20 x minus 11 y plus 6
C
20 x plus 11 y plus 14
D
20 x plus 21 y plus 6

Explanation

First combine like terms inside the parentheses: 150x − 50x = 100x, −80y − 25y = −105y, and 50 + 20 = 70. Multiplying each term by one fifth gives 20x − 21y + 14, which is choice A.

AI-written and checked against the verified answer.

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