What is the solution to this system of linear equations? 2x + y = 1 3x – y = –6 (–1, 3) (1, –1) (2, 3) (5, 0)4

Step-by-step explanation:

2x + y = 1     ⇒  y = 1 - 2x

3x - y = -6

3x  - (1 - 2x) = -6

3x - 1 + 2x = -6

       +1           +1

   5x  = -5

  ÷5      ÷5

   x = -1

y = 1 - 2(-1) = 1 + 2 = 3

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true