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Answer #1

89.1% = .891 = 891/1,000

74.7% = .747 = 747/1,000

191% = 1.91 = 191/100

31% = .31 = 31/100

Answer #2

1/20 = .05 = 5%

65/50 = 1.3 = 130%

29/40 = .725 = 72.5%

8/10 = .8 = 80%

5/8 = .625 = 62.5%

Answer percent : 89.1% : .891 = 891/1,000

74.7% = 747 = 747/1,000

191% = 1.91 = 191/100

31% = .31 = 31/100:

Fraction: 1/20 : 0.05 , 5%

65/50 ; 130%, 1.3

29/40 ; 0.725 ,72.5%

8/10: 0.8 ,80%

5/8: 0.625 62.5%

Decimal:

1.41: 141/100, 141%

0.622: 311/500 , 62.2%

0.33: 33/100, 33%

0.637: 637/1000, 63.7%

0.39: 39/100, 39%

it is true

step-by-step explanation:

all the combinations add up i used   calculator

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a