Which equation has the solutions x=1+or- /5?

a. x2 + 2x + 4 = 0
b. x2 – 2x + 4 = 0
c. x2 + 2x – 4 = 0
d. x2 – 2x – 4 = 0

There is no quadratic equation which has solution x = 1 or -5

Step-by-step explanation:

For part A)

For part B)

For part C)

For part D)

There is no quadratic equation which has solution x = 1 or -5

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: