If a backpack cost $50 and the tax rate is 6.5 how much tax will i have pay?

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 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section