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3 years ago

Write a quadratic function f whose zeros are -9 & -1

Mathematics

1 answer:

olganol [36]3 years ago

7 0

Step-by-step explanation:

This is most easily solved by writing the factored form:

$f(x) = (x + 9)(x + 1)$

Notice how, if we were to substitute -9 for x, the left part would be -9 + 9 = 0. Since (x + 1) × 0 = 0, this makes the function 0. The same logic applies for the right part.

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Answer:

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Step-by-step explanation:

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3 years ago

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What is the phase shift of a periodic function?

gogolik [260]

The Phase Shift is how far the function is shifted horizontally from the usual position.

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3 years ago

In circle E, AC=4, CG=6, and AH=3, Find HB and EG. If necessary, round to the tenths place.

bezimeni [28]

Using theorem about secant segments we can write,
AB*AH=AG*AC
AC=4,
CG=6
AG=AC+CG=4+6=10
AH=3
AB= AH+HB=AH+x=3+x
(3+x)*3=10*4
9+3x=40
3x=40-9
3x=31
x=31/3≈10.3
HB≈10.3
EG=HB/2 (as radius and diameter)
EG=10.3/2≈5.2

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3 years ago

A newspaper article about the results of a poll states: "In theory, the results of such a poll, in 99 cases out of 100 should di

zavuch27 [327]

The sample size suggested by this statement is 664 option second is correct.

<h3>What is the margin of error(MOE)?</h3>

It is defined as an error that provides an estimate of the percentage of errors in real statistical data.

The formula for finding the MOE:

$\rm MOE = Z\times \dfrac{s}{\sqrt{n}}$

Where Z is the z-score at the confidence interval

s is the standard deviation

n is the number of samples.

At 99% confidence Z = 2.576

By using the MOE formula:

0.05 = 2.376×√(0.5(0.5)/n)

After calculating

n = 663.57 ≈ 664

Thus, the sample size suggested by this statement is 664 option second is correct.

Learn more about the Margin of error here:

brainly.com/question/13990500

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2 years ago

9р - Зр equivalent expression

Vesnalui [34]

Answer:

Step-by-step explanation:

9p - 3p needs to have the like terms combined. 9 - 3 is 6, and since you have to keep the p, the answer is 6p.

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2 years ago