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3 years ago

Which is f(-3) for quadratic function graphed

Mathematics

1 answer:

liberstina [14]3 years ago

3 0

The -3 in f(-3) is the X coordinate, so you need to find where the line is on the Y coordinate at that point.

The line is at Y = -9

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Each family in a neighborhood is contributing $ 20 worth of food to the neighborhood picnic. The Harlin family is bringing 12 pa

Georgia [21]

Answer:

Step-by-step explanation:

7 0

3 years ago

A professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their class

KIM [24]

Answer:

We conclude that seniors skip more than 2% of their classes at 0.01 level of significance.

Step-by-step explanation:

We are given that a professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their classes.

He randomly samples a group of seniors and out of 2521 classes, the group skipped 77.

Let p = percentage of seniors who skip their classes.

So, Null Hypothesis, $H_0$ : p $\leq$ 2% {means that seniors skip less than or equal to 2% of their classes}

Alternate Hypothesis, $H_A$ : p > 2% {means that seniors skip more than 2% of their classes}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of seniors who skipped their classes = $\frac{77}{2521}$

n = sample of classes = 2521

So, test statistics = $\frac{\frac{77}{2521} -0.02}{{\sqrt{\frac{\frac{77}{2521}(1-\frac{77}{2521})}{2521} } } } }$

= 3.08

The value of the test statistics is 3.08.

Now at 0.01 significance level, the z table gives critical value of 2.3263 for right-tailed test. Since our test statistics is more than the critical value of z as 2.3263 < 3.08, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that seniors skip more than 2% of their classes.

6 0

3 years ago

The Angle-Angle Similarity Postulate states that two triangles are similar if they have _________ pairs of corresponding angles

ehidna [41]

Answer: i thinks its conjointed twins

Step-by-step explanation:

my brother said it was that and hes smart so he dropped out of 8th grade

3 0

2 years ago

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Describe the distributive property. How is it different from other properties? Csn you give an example?

Misha Larkins [42]

When you distribute, its basically when you give out things, as in, distribution.
Hope this helps!!
If you need any help,, just let me know :) :) :) ) ) :) :) ) :)

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3 years ago

Q2: What is the radius? Because this is an approximation use 3.14 as pi. Round to

bija089 [108]

Answer:

r=11 m

Step-by-step explanation:

Too lazy to explain:

πr²h=v

3.14*r²*12=4560

r²≈121

r is 11 m

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3 years ago

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