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3 years ago

PLEASE HELP!!!!!!!!!!! I SUCK AT MATH AND I CAN'T FIGURE THIS OUT!

Mathematics

2 answers:

nikdorinn [45]3 years ago

8 0

Answer:

$25.97

Step-by-step explanation:

2.50+8.75+3+10.25 = 24.50 This is the items be bought and now needs to pay 6% tax.

24.50/100*106 = 25.97

valentinak56 [21]3 years ago

6 0

First find the subtotal - this is the total cost of all items before tax.

$2.50 + $8.75 + $3.00 + $10.25 = $24.50

The 6% tax is applied to the subtotal - this is essentially adding 6% of the subtotal to the subtotal. 6% of the subtotal is

0.06 * $24.50 = $1.47

so the tax is $1.47. (This was done without using the distributive property.)

Computed another way, we can instead apply the 6% tax to all items individually:

0.06 * $2.50 = $0.15

0.06 * $8.75 = $0.525

0.06 * $3.00 = $0.18

0.06 * $10.25 = $0.615

Then we total this to find the total tax:

$0.15 + $0.525 + $0.18 + $0.615 = $1.47

(with the distributive property)

- - -

In both cases, we're computing

0.06 * ($2.50 + $8.75 + $3.00 + $10.25)

Without the distributive property, the idea is to simplify the terms being added first, then multiplying that by the tax rate.

With the distributive property, we distribute the tax rate to each item, then add those products together.

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Lelu [443]

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Answer:

y = (x -1)² -16

Step-by-step explanation:

Note the location of the vertex (point A) on the graph. Its x-coordinate is readily identifiable as 1. Its y-coordinate is some value between -15 and -20, closer to -15. (If you go to the trouble of finding the vertex coordinates, you discover they are (1, -16).)

Once you have determined what the vertex is, you can compare the offered answer choices to the vertex form ...

y = (x -h)² +k

where (h, k) are the vertex coordinates. That is, you are looking for an answer choice that is something like ...

y = (x -1)² -16

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3 years ago

Fowle Marketing Research Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean tim

sergejj [24]

Answer:

a) Null hypothesis: $\mu \leq 15$

Alternative hypothesis: $\mu > 15$

b) $t=\frac{17-15}{\frac{4}{\sqrt{35}}}=2.958$

c) $p_v =P(t_{34}>2.958)=0.0028$

d) If we compare the p value and the significance level given $\alpha=0.01$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 15 at 1% of signficance.

Step-by-step explanation:

Data given and notation

The sample mean is given by:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And the sample deviation is:

$s = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

$\bar X=17$ represent the sample mean

$s=4$ represent the sample standard deviation

$n=35$ sample size

$\mu_o =15$ represent the value that we want to test

$\alpha=0.01$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

Part a State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is less or equal than 15, the system of hypothesis would be:

Null hypothesis: $\mu \leq 15$

Alternative hypothesis: $\mu > 15$

Since we don't know the population deviation, is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Part b Calculate the statistic

We can replace in formula (1) the info given like this:

$t=\frac{17-15}{\frac{4}{\sqrt{35}}}=2.958$

Part c P-value

The degrees of freedom are given by:

$df = n-1= 35-1=34$

Since is a right tailed test the p value would be:

$p_v =P(t_{34}>2.958)=0.0028$

Part d Conclusion

If we compare the p value and the significance level given $\alpha=0.01$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 15 at 1% of signficance.

7 0

3 years ago

Somebody helpppppppppppoo

Marizza181 [45]

Answer:

40 degrees : )

4 0

3 years ago

I will give brainliest<br> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

postnew [5]

Answer:

I've labled all in red, hope this helps.