2 years ago

Ms. Scarborough solved x^2+6x-7 by completing the square in the table below. Identify the missing steps.

1 answer:

8 0

Answer 1: Move the -7 over to the right side of the problem.
Answer 2: $x^2 + 6x + 9 = 7+9$
Answer 3: $(x+3)^2 = 16$
Answer 4: Use the square root for both sides of the equation.
Answer 5: x = -3 <span>± 4 = 1, -7 --> x = 1, -7</span>

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In the Central City Grand Prix, out of 30 cars that started the race, 12 of them finished. What percent of the cars finished the

snow_lady [41]

To get the answer we can use proportion.
30----------100%
12-----------x
Cross multiply now
30x=12*100%
30x=1200% /:30 (divide both sides by 30)
x=40% - it's the percentage of cars which finished the race.
100%-40%=60% - it's the answer

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2 years ago

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dolphi86 [110]

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3 years ago

Find the axis of symmetry for f(x)=-3x^2+5x-6

Andreyy89

Answer:

x= -5/6

Step-by-step explanation: