Question

Sarah has a total of 52 DVD's and CD's. If the number of CD's is two more than four times the number of DVD's, how many CD's does she have?

Answer 1

You can write 2 equations with the given information. Let d = the number of DVDs and c = the number of CDs. Can you think of an equation you can write?

Answer 2

is the awnser 42

Answer 3

if it is i need another question help with:
What is the slope of a line that passes through the point (−2, 3) and is parallel to a line that passes through (3, 7) and (−2, −8)?

Answer 4

I don't know. I haven't worked it out. How did you get 42?

Answer 5

10 is the number of dvds and then four times 10: 40 add 2: 42cds + 10dvds = 52 in total

Answer 6

So you just kinda did it by feel...trying different numbers. If it works go with it.

Do you know how to get the slope of the line through 3,7 and -2,-8?

Answer 7

no

Answer 8

not really forgot

Answer 9

Slope = (y2 - y1)/(x2-x1) Sound familiar?
m = (-8-7)/(-2-3)=3

Answer 10

We now know the slope of the line (3) and a point on the line (-2,3).
So now use the point-slope line equation:
y-y1 = m(x-x1) m is slope (x1,y1) is any point on the line (which we know)

Answer 11

the slope is three

Answer 12

Yeah. If were parallel to the line through those 2 points we have to have the same slope as that line.

Answer 13

Sorrylllgotta go. Family chore thing. bye

Answer 14

thank you