Paintbrushes normally cost $7 each, but they are on sale for $1 off. A paintbrush case costs $16. The expression 7p − p + 16 can be used to find the cost in dollars of buying p paintbrushes on sale plus a case for them. The bar model below simplifies the expression 7p − p + 16 using squares to model combining like terms.

c. 4 and 1/2 pounds is the answer! : )

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

tip $2.90

total $17.40

add a pic of the graph, then ill edit this "answer" and solve it for you : 3

step-by-step explanation: