Friday

January 30, 2015

January 30, 2015

Posted by **rufus** on Monday, April 7, 2008 at 9:33am.

1)Given that one cassette cost $x and one cd cost $y,write two equations in x and y to represent this information.

2)Calculate the cost of one cassette.

- math -
**Reiny**, Monday, April 7, 2008 at 9:52am1. just translate the English into Math

"Two cassettes and three cd's cost $175" ---> 2x + 3y = 175

"four cassettes and one cd cost $125" ---> 4x + y = 125

2. double the first equation

4x + 6y = 350 then subtract the second

4x + y = 125

-------------

5y = 225

y = 45

back in the second

4x + 45 = 125

4x = 80

x = 20

(expensive cassettes and CDs)

**Answer this Question**

**Related Questions**

Help!Math.... - Six pears and three apples cost $3.90. Two pears and five apples...

Maths - A)One packet of biscuits cost $x and one cup of ice cream $y B)One ...

Algebra!! - Six pears and three apples cost $3.90. Two pears and five apples ...

Algebra1!!! - 1.Six pears and three apples cost $3.90. Two pears and five apples...

math, help - how do i write the equations so i can solve it i will do the ...

math,algebra,help - Problem states: Business and finance. The cost of producing ...

business and finance - The cost of producing a number of items x is given by C=...

9th grade - it cost $2 per day to place a one-line ad in the classifieds plus a ...

Algebra! - Six pears and three apples cost $3.90. Two pears and five apples cost...

Economics - CCM television station is considering selling promotional videos ...