Elaine wants to purchase books. On Monday, she purchased 5 red bags of books and 9 blue bags of books for a total of 78 books. On Tuesday she purchased 7 red bags of books and 4 blue bags of books for a total of 49 books. How many books are in a red bag? How many in a blue bag? 5x+9y=78
7x+4y=49

if the system of equations on above represents what is happening in this problem, define x and y.

Let x= Let y=

What evidence from the system of equations helped you determine which was x and which was y?

2? if not the correct answer you might need to provide more information

step-by-step explanation:

the length of o'p' is .

step-by-step explanation:

it is given that the quadrilateral m'n'o'p' is the image of quadrilateral mnop after dilation.

the center of dilation is origin and the scale factor is 1.5.

in dilation the image and preimge are similar figures. it means the sides of image and preimage are proportional.

the scale factor is defined as

the scale factor is 1.5.

multiply both sides by op.

note: if the value of op is given, then multiply the value of op with 1.5 to get the length of side o'p'.

therefore length of o'p' is .