Ineed the linear equations for this following questions 3x-5y=10 3x+2y=7 3x-1/2y=3

y = 3/5x - 2

y = -1.5x + 3.5

y = 6x - 6

Step-by-step explanation:

For equation 3x - 5y = 10:

Rearraging gives;

5y = 3x - 10

Dividing throughout by 5 gives;

y = 3/5x - 2

For equation 3x + 2y = 7:

Rearraging gives;

2y = -3x + 7

Dividing throughout by 2 gives;

y = -3/2x + 3.5

For equation 3x - 1/2y = 3:

Rearraging gives;

1/2y = 3x - 3

Multiplying throughout by 2 gives;

y = 6x - 6

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

y=20x

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hope this