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defon
3 years ago
9

PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

Answer:

The answer is -x^2+7x+1 I think

Step-by-step explanation:


Viktor [21]3 years ago
8 0

Answer: (D) y = x² + 7x + 1

<u>Step-by-step explanation:</u>

Since a table of x,y-values are given, choose a coordinate and plug it into each equation to see which results in a true statement.  If more than one equation is true, then choose another coordinate and plug it into the true equations from the previous coordinate.

Let's try (0, 1):

(A) y = x² - 7x - 1

    1 = (0)² - 7(0) - 1

    1 = -1

   FALSE, So A is not the quadratic equation we are looking for

(B) y = x² - 7x + 1

    1 = (0)² - 7(0) + 1

    1 = 1

    TRUE, So B could be the quadratic equation we are looking for

(C) y = -x² + 7x + 1

    1 = -(0)² + 7(0) + 1

    1 = 1

    TRUE, So C could be the quadratic equation we are looking for

(D) y = x² + 7x + 1

    1 = (0)² + 7(0) + 1

    1 = 1

    TRUE, So D could be the quadratic equation we are looking for

Let's try (1, 9) for B, C, and D:

(B) y = x² - 7x + 1

    9 = (1)² - 7(1) + 1

    9 = -5

    FALSE, So B is not the quadratic equation we are looking for

(C) y = -x² + 7x + 1

    9 = -(1)² + 7(1) + 1

    9 = 7

    FALSE, So C is not the quadratic equation we are looking for

(D) y = x² + 7x + 1

    9 = (1)² + 7(1) + 1

    9 = 9

    TRUE, So D is the quadratic equation we are looking for!


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A poll was conducted by a home mortgage company regarding home ownership in the United States. The company polled 1,488 American
____ [38]

If the sample size is 1488 and confidence interval of 99% then the margin of error is 0.03088.

Given sample size of 1488, percentage of those polled own a home be 69% and confidence level be 99%.

We are required to find the approximate margin of error.

Margin of error is the difference between calculated values and real values.

n=1488

p=0.69

Margin of error=z*\sqrt{p(1-p)/n}

Z score when confidence level is 99%=2.576.

Margin of error=2.576*\sqrt{0.69(1-0.69)/1488}

=2.576*\sqrt{(0.69*0.31)/1488}

=2.576*\sqrt{0.2139/1488}

=2.576*\sqrt{0.0001437}

=2.576*0.01198

=0.03088

Hence if the sample size is 1488 and confidence interval of 99% then the margin of error is 0.03088.

Learn more about margin of error at brainly.com/question/10218601

#SPJ1

3 0
2 years ago
3x + 2 =11 (solve for x)
torisob [31]

Answer:

x=3

Step-by-step explanation:

first let's try to get just 3x on one side. to do this we can subtract 2 from both side of the equation.

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now we have to isolate the variable we can divide both sides by 3:

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and you get the answer that x is 3

4 0
3 years ago
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7 0
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DIA [1.3K]
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MA_775_DIABLO [31]

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