If x is directly proportional to y and x= 4.5 when y = 3 find y when x = 24

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

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