1) -23 + (-8) = 2) -5 • -3 =

3) -19 + 6 =

4) -56 ÷ 8 =

5) (-4) (-8) =

6) -13 – 20 =

7) -12 + (-11) =

8) -20 / -10 =

9) 3 – (-12) =

10) -24 + 19 =

Step-by-step explanation:

1) -23 + (-8) = -31

2) -5 • -3 = 15

3) -19 + 6 = -13

4) -56 ÷ 8 = -7

5) (-4) (-8) = 32

6) -13 – 20 = -33

7) -12 + (-11) = -23

8) -20 / -10 = 2

9) 3 – (-12) = 15

10) -24 + 19 =-5

center= (-2,0)

radius= sqrt2/2

step-by-step explanation:

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: