Iwould like to know the answer to #
seriously does anyone know? ?

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.