10 points!asap how do i find the perimeter of a trapezoid?

Use the triangle formed by the height of the trapezoid to find the lengths of the two sides of the trapezoid and the length of b2:

tan(60)=oppositeadjacent . Adjacent=5tan(60)=2.89 cm.

This finds the base of the triangle, which can be added twice to b1 to find b2: b2=8+2.89+2.89=13.78 cm.

Now, use the same triangle to find the length of the sides.

sin(60)=oppositehypotenuse . Hypotenuse=5sin(60)=5.77 cm.

Lastly, add all of the lengths together: b1+b2+2(l)=8+(2.78+2.78+8)+2(5.77)=33.32 cm.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: