Question 1

Select the algebraic expression for each of the following statements.

Question 1a - f - multiple choice question

a	A number x is multiplied by 5 and then 7 is added to the result.
	5(x + 7)	5x – 7	5x + 7
b	Four is added to a number p and then the result is multiplied by 6.
	p + 4 × 6	6(p + 4)	24p
c	A number x is subtracted from 20 and then the result is divided by 3.
	20 – \(\dfrac{x}{3}\)	\(\dfrac{20\ – x}{3}\)	\(\dfrac{x\ – 20}{3}\)
d	A number m is multiplied by 2 and then result is subtracted from 20.
	20 – 2m	2m – 20	2(m – 20)
e	A number 7 is divided by k and then 10 is subtracted from the result.
	\(\dfrac{k}{7 – 10}\)	\(\dfrac{7}{k}\) – 10	\(−\ \dfrac{3}{k}\)
f	A number j is squared and then subtracted from 15.
	2j – 15	15 – 2j	15 – j²
g	A number g is subtracted from 20 and then the result is multiplied by –5.
	–5(20 – g)	–5(g – 20)	–5g – 20