Best buy sells cds and dvds. jose bought 3 cds and 2 dvds for $58. lisbeth bought 1 cd and 4 dvds for $46. determined the selling price for each.

x = CD

y = DVD

Jose: 3x + 2y = 58

Lisbeth: x + 4y = 46

We can use substitution to solve:

x + 4y = 46 subtract 4 from both sides:

x = 46 - 4y

Plug this into the first equation:

3(46 - 4y) + 2y = 58

138 - 12y + 2y = 58

138 - 10y = 58

-10y = -80

y = 8

Plug this into the second equation:

x + 4(8) = 46

x + 32 = 46

x = 14

DVDs cost $8 and CDs cost $14

here you hope this .

step-by-step explanation:

hypotenuse = √(15² + 8²)

=  √(225 +64)

=  √(289) = 17

sin(x) = cos(y) = 8/17

they are identical so long as you are doing the sine of one angle and the cosine of the only other angle that isn't the right angle.

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