Which expression is equivalent to 20y - 5 A. 4(5y-1)

B. 20(y-5)

C. 5(4y-1)

D. y(20-5)

9514 1404 393

  C.  5(4y-1)

Step-by-step explanation:

The answer choices are all factored forms. The only common factor in 20y-5 is 5, so the factored form with 5 as a factor is the appropriate one:

  5(4y -1)

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation:

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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