Asap ! i have no clue how to do this !

A)

Equation:  RS + ST = RT

               (2x + 10) + (x-4) = 21

Solve:

2x+10 + x-4 = 21

Combine like terms:

3x + 6 = 21

Subtract 6 from each side:

3x = 15

Divide both sides by 3:

X = 15/3

X = 5

Now replace x with 5 in each equation:

RS = 2x+10 = 2(5) +10 = 10+10 = 20

ST = x-4 = 5-4 = 1

B)

Equation:  RS + ST = RT

               (3x - 16) + (4x-8) = 60

Solve:

3x-16 + 4x-8 = 60

Combine like terms:

7x - 24 = 60

Add 24 to both sides:

7x = 84

Divide both sides by 7:

x = 84/7

X = 12

RS = 3x-16 = 3(12) - 16 = 36-16 = 20

ST = 4x -8 = 4(12) -8 = 48 - 8 = 40

C)

Equation: RS + ST = RT

                 2x-8 + 11 = x+10

Solve:

2x-8 + 11 = x +10

Simplify left side:

2x +3 = x+10

Subtract 3 from both sides:

2x = x +7

Subtract 1x from each side:

x = 7

RS = 2x -8 = 2(7) - 8 = 14-8 = 6

RT = x+10 = 7+10 = 17

answer: no

step-by-step explanation:

you are only given the cost not the amount of pounds.

(0,,,0)

step-by-step explanation:

the table of x and y values is shown in the attached pic(part of question)

we have to decide according that graph

given points are (0, 0) (–1, 0), (2, 0)

when we graph these points on graph they show an increasing line as shown in the attached pic