Apply quadratic fromula to solve the following problems: a) y = x2 + 1
y = x + 1

b) y = 5x – 20
y = x2 – 5x + 5

c) y = -0.5.x2 – 2x + 1
y + 3 = -x

answer: hey there,

the answer you are looking for is a..

hope this you!

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