Question

An online store sells speakers the higher prices sells 170 and the lower priced 90last week the store sold 4 times as many lower prices Spenser combined 3,710

Answer 1

Answer:

The number of lower-priced speaker sold was 28

Step-by-step explanation:

The complete question is

An online store sells two types of speaker. The higher-priced speaker sells for $170 and the lower-priced speaker sells for $90. Last week the store sold four times as many lower-priced speaker as higher-priced speaker. Combined sales totaled $3,710. How many lower-priced speaker did it sell?

Let

x ----> the number of higher-priced speaker sold

y ----> the number of lower-priced speaker sold

we know that

Last week the store sold four times as many lower-priced speaker  as higher-priced speaker

so

$y=4x$ ----> equation A

Combined sales totaled $3,710

so

$170x+90y=3,710$ ----> equation B

Solve the system by graphing

Remember that the solution is the intersection point both graphs

Using a graphing tool

The solution is the point (7,28)

see the attached figure

therefore

The number of lower-priced speaker sold was 28 and the number of higher-priced speaker sold was 7