Hi can someone help me with this please

The answer is explained below.

Step-by-step explanation:

A. 15 + 5 = 30

     20 = 30

     False

B. 5(7) - 3 = 32

    35 - 3  = 32

      32     = 32

         True

C. 25 =

25 =

25 = 25

 True

D. 7(3) + 3 = - 1

    21 + 3  = 25 - 1

      24     =   24

           True

E. 6(11-8) =  

     6(3)  =  

      18   =   8

        False

F. - 4(5) = |-9| - 2

 27 - 20   = 9 - 2

          7    =  7

          True

Hope that helps!

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

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.