A bird park has black and white birds in the ratio of 8 to 2 as shown below. Which is another ratio that can describe the black to white birds?
04 to 1
0 1 to 4
1 to 7
7 to 1

What is the maximum total area that 450cm of string can enclose if it is used to form perimeters of two adjoining rectangles as shown?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36