What is the ratio for trigonometric cosD? Enter your answer, as a simplified fraction, in the boxes. $$ triangle d e f with right angle e. d e equals 21. d f equals 75. e f equals 72.

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.