The circle graph below describes the colors of the balls of yarn in a bag.
Blue
30%
Red
50%
Yellow
20%
There are 8 yellow balls in the bag. What is
the total number of balls?
A) 16
B) 20
C) 40
D) 88

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -

i think the answer is a.( -3, -1 )

answer is

b.

11

hope you get this one right.