Which of the following quadrilaterals contains opposite angles that are congruent? select all that apply.
a. trapezoid
b. isosceles trapezoid
c. parallelogram
d. rhombus
e. rectangle
f. square

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

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets,x, and the number of student tickets,y. find the solution and explain what it means. i'll you if you me

Pls never taught i’m really confused and i rlly need