Question

9) Norma and Lauretta went to a store to buy DVDs on sale for $5 each, tax included. Norma purchased two

and a half times as many DVDs as Lauretta purchased. Together they purchased 14 DVDs, Which system of
linear equations can be used to determine , the number of DVDs Norma purchased, and I, the number of DVDs
Lauretta purchased?

Answer 1

Answer: H

Explanation:

The cost of $5 has not meaning for what we want. The are only trying to figure out the number each bought so that was thrown in to throw you off.

you know they bought 14 total DVDs

n+L=14 the number norma bought + number Lauretta bought is 14

Th next key sentence is Norma purchased two and a half times as Luaretta

In the sentence:

Norma is n

purchased is your = sign (usually in word problems "is" "costs" etc is =

Two and 1 half
`2(1)/(2)` =
`(5)/(2)`

times is * (multiplied)

Lauretta is l

Substitute each symbol for each work

Norma(n) purchase(=) two and a half
`(5)/(2)` times* L

n=
`(5)/(2)`L

n+L=14 these are your 2 equations H