Which of the following expressions had a constant of 6 and a coefficient of 2/3?

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

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers