Plz I really need help with this problem

The area of the shaded portion is 450.185 in^2

Step-by-step explanation:

21^2+20^2=841

The square root of 841 is 29

29+20+21=70

70*1/2=35

35-29=6

35-21=14

35-20=15

The square root of 35*6*14*14=210

The area of the triangle is 210 in^2

The diameter of the circle is 29, so the radius is 14.5

14.25^2=210.25

210.25*3.14=660.185

660.185-210=450.185

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:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: