The sleeping heart rate of a black bear during hibernation is about 2/5 of its summer rate. If the sleeping heart rate of a bear is 28 beats per minute during hibernation,
find the summer sleeping heart rate.

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.