A. 9.9
b. 10.1
c. 8.9
d. 10.5

a should be the length of x.

Step-by-step explanation:

the Pythagorean Theorem can be used to solve this.

a²+b²=c²

If we plug our measurements one by one it's shown that answer choice A is closest to 18.

9.9²+15²=323.01

=17.97

when rounded this gives us 18.

Hope this helps!

-MoCKEry

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: