In isosceles △abc, ab = bc and ch is an altitude. find the perimeter of △abc, if ch = 84 cm and m∠hbc = m∠bac +m∠bch?

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

What is sin 7x/4 ? i need on this urgent trig

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.