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3 years ago

Please help me!!!!!!!

Mathematics

1 answer:

kvasek [131]3 years ago

7 0

The minimum of a graph is where the curve of the parabola is at its lowest point. On this graph the minimum looks to be at (-2, -2), but make sure that is where the curve is lowest.

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Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

MrRissso [65]

Formula for the area of a face of a cube: A = length x width

Let's find the area of one face.

A = 5 x 5

A = 25

Now, let's multiply the area of one face by 6 because a cube has 6 faces.

25 x 6 = 150

A = 150 square centimeters

Hope this helps! :)

4 0

3 years ago

Write an explicit rule to represent the sequence:

alexgriva [62]

$a_n=4n+16$

6 0

3 years ago

Read 2 more answers

It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 120 feet. A transportat

Mrrafil [7]

Answer:

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is equal to 120 or not, the system of hypothesis would be:

Null hypothesis: $\mu = 120$

Alternative hypothesis: $\mu \neq 120$

Part 2

Calculate the statistic

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

$z=\frac{114-120}{\frac{22}{\sqrt{36}}}=-1.636$

P-value

Since is a two sided test the p value would be:

$p_v =2*P(z$

Step-by-step explanation:

Data given and notation

$\bar X=114$ represent the sample mean

$\sigma=22$ represent the population standard deviation

$n=36$ sample size

$\mu_o =120$ represent the value that we want to test

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

t would represent the statistic (variable of interest)

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

Part 1

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is equal to 120 or not, the system of hypothesis would be:

Null hypothesis: $\mu = 120$

Alternative hypothesis: $\mu \neq 120$

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-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 2

Calculate the statistic

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

$z=\frac{114-120}{\frac{22}{\sqrt{36}}}=-1.636$

P-value

Since is a two sided test the p value would be:

$p_v =2*P(z$

8 0

3 years ago

How much is $1250 worth at the end of 3 year, if the interest rate of 6.5% is compounded weekly?

matrenka [14]

Answer:

3 X 52 =156

100+6.5 = 106.5, 106.5/100 = 1.065

1250 X 1.065^156 = 23091323.5

$23091323.50

6 0

3 years ago

Suppose f(x) = x2 and g(x) = (3x)2. Which statement best compares the graph

Ksenya-84 [330]

Answer:

Step-by-step explanation:

Please use " ^ " to indicate exponentiation: f(x) = x^2 and g(x) = (3x)^2.

g(x) can be rewritten as 9x^2.

The graph of g(x) is only one ninth as wide as that of f(x).

Next time please share the possible answer choices. Thank you.

6 0

3 years ago