Find a value of k such that kx2 + 12x - 4 = 0 has one real-number solution. Explain. A. 6; the equation of the discriminant is 12(2) – 4k(4) = 0.
O
B. -9; the equation of the discriminant is 122 - 4k(-4) = 0.
O C. 36; the equation of the discriminant is 122 - 4k = 0.
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D. 9; the equation of the discriminant is 122 - 4k(4) = 0.

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

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

6+6=12 so that just tells you what it is one half is 6 the next one is 6