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andrew-mc [135]
3 years ago
8

WILL GIVE YOU BRIANLEST PLEASE HELP

Mathematics
1 answer:
Elza [17]3 years ago
6 0

Answer:

Students should be able to find the x-intercepts of a quadratic function using both factoring and completing the square. All that should be given to students is the standard form of a quadratic equation in the form y = ax^2 + bx + c.

Step-by-step explanation:

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PLEASE ANSWER IN THE SCREENSHOT. I WILL MARK BRAINLYEST
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Yes, the table is correct
There would be 60 squares as the ratio of triangles to squares is 3:4
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Ms. Melcher plans to decorate her house. Ms. Melcher wants to buy a rug to cover her bed room floor. If Ms. Melcher's bed room i
Marrrta [24]
The area of a square or a rectangle (which is the shape of any room in a house) is:

Area = width x length

So, in this case:

Area = 51 m x 26 m = 1326 Sq meters.  Which is pretty big if you ask me.

Anyhow, Ms Melcher needs to buy 1326 sq meters
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4 years ago
A study of injuries to in-line skaters used data from the National Electronic Injury Surveillance System, which collects data fr
Katarina [22]

Answer:

(a)  One count is only 7, and the guidelines for using the large-sample method call for all counts to be at least 10.

Step-by-step explanation:

Attached is the solution to b and c

8 0
4 years ago
What kind of Function best models the Data in the table?
Vikki [24]

Answer:

a) linear

Step-by-step explanation:

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8 0
3 years ago
Read 2 more answers
It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken if the desir
Ksju [112]

Answer:

We need a sample size of at least 75.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, we find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The standard deviation is the square root of the variance. So:

\sigma = \sqrt{484} = 22

With a .95 probability, the sample size that needs to be taken if the desired margin of error is 5 or less is

We need a sample size of at least n, in which n is found when M = 5. So

M = z*\frac{\sigma}{\sqrt{n}}

5 = 1.96*\frac{22}{\sqrt{n}}

5\sqrt{n} = 43.12

\sqrt{n} = \frac{43.12}{5}

\sqrt{n} = 8.624

(\sqrt{n})^{2} = (8.624)^{2}

n = 74.4

We need a sample size of at least 75.

6 0
3 years ago
Read 2 more answers
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