Three times the sum of a number and seven, all divided by four?

Sate why the measure of angle d is 120 degrees

Shown here are the three essential steps in a proof of the pythagorean theorem. comparing the 1st and 3rd steps how are the colored regions related as to the areas? a. yellow+blue=orange b. orange=yellow=green c.yellow+blue=green=orange d.yellow+green=orange+blue

Which inequality represents all the values of x for which the quotient below is defined? √x+1 ÷ √ 4-x