allieboney allieboney
  • 03-02-2017
  • Mathematics
contestada

Your purchase of CDs and DVDs has a total of 7 items. CDs cost9 each and DVDs cost 15 each. The total purchase costs 87 write and solve a system of equations to find x of CDs and y or DVDs that you purchased.

Respuesta :

matson matson
  • 03-02-2017
9c + 15d = 87
I don't know how to use the equation to answer it, but 4 DVDs were bought, and 3 CDs were bought. 
Answer Link

Otras preguntas

Are the expressions equivalent? 10(x + 2); 10x + 5
can someone answer this
The details included in the description of the garden (""The garden ... grass"") in the first paragraph suggest the narrator's interest in
How did America wield military strength to broaden its power globally?
What is the slope of the line
Why did Yaroslav The Wise use religion to unite Russia with other empires?’
What is the main motivation of imperialism for Albert Beveridge?
A contractor needs to buy grass seed to cover a lawn. The dimension of the llama song below. One bag of grass seed cover isn’t it area of 600sy. Shade in the mi
Guernica is a painting completed in response to a devastating point in the civil war in Spain TRUE OR FALSE
A factory made 42 packs of mint-flavored gum and 58 packs of fruit-flavored gum. What percentage of the packs contained mint gum?