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3 years ago

Find the value of x.

Mathematics

2 answers:

Bad White [126]3 years ago

4 0

Answer:

Step-by-step explanation:

Bonsoir,

63°

castortr0y [4]3 years ago

4 0

The answer should be 63°

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-6 ( x – 8) = 60 I need help with this and Ik the answer but I dont get how he got the answer

Leto [7]

Answer:

-2

Step-by-step explanation:

See the image below:)

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3 years ago

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It takes 6 cubes to build a staircase with 3 steps. How many cubes will be needed for 11 steps?

Leya [2.2K]

Answer:

5 more cubes

Step-by-step explanation:

you just keep on adding the cubes. So i am in honors math and the easiest way to do math like this just use paper so start with the number of cubes and the just keep on adding till you get to the number you need in this case that number is 11.

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3 years ago

15. When x = -3, what is the value of

Anna007 [38]

$\huge\text{Hey there!}$

$\huge\textbf{Solving for your equation:}$

$\mathbf{|4x^2| - 3x - (9 - |-3x|)}$

$\mathbf{= |(4)(9)|-(2)(-3)-(9-|(-3)(-3)|)}$

$\mathsf{= |36| - (2)(-3)- (9 - |(-3)(-3)|)}$

$\mathbf{=36 - (2)(-3) - (9 - |(-3)(-3)|)}$

$\mathbf{= 36 -(-6) - (9 - |(-3)(-3)|)}$

$\mathbf{= 42 - (9 - |(-3)(-3)|)}$

$\mathbf{= 42 - (9 - |9|)}$

$\mathbf{= 42 - (9 - 9)}$

$\mathbf{= 42 - (0)}$

$\mathbf{= 42 - 0}$

$\mathbf{= 42}$

$\huge\textbf{Notice that your equation kept getting}\\\huge\textbf{getting smaller and smaller?}\\\\\\\huge\textbf{That's because we kept solving as we got}\\\huge\textbf{closer to your result and we got there}\\\huge\textbf{sooner than we thought :)}$

$\huge\textsf{ANYWAY!}$

$\huge\textsf{Therefore, the answer is: \boxed{\mathsf{Option\ D. 42}}}\huge\checkmark$

$\huge\text{Good luck on your assignment \& enjoy your day!}$

~ $\frak{Amphitrite1040:)}$

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2 years ago

NEED HELP ASAP PLEASE WILL GIVE BRAINLYEST

Tomtit [17]

Answer:

True

Step-by-step explanation:

One is the opposite of the other

8 0

3 years ago

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A personnel director in a particular state claims that the mean annual income is the same in one of the state's counties (Coun

Shalnov [3]

Answer:

a) The hypothesis that the mean annual income is the same could not be rejected. There is no enough evidence to claim they are different.

b) The critical values for this two-sided test are t=±1.711.

Step-by-step explanation:

The question is incomplete:

(a) Identify the claim and state H0 and Ha.

Which is the correct claim below?

(b) Find the critical value(s) and identify the rejection region(s).

Enter the critical value(s) below.

We have an hypothesis test on the difference of two means.

The null and alternative hypothesis are:

$H_0: \mu_a-\mu_b=0\\\\H_a: \mu_a-\mu_b\neq 0$

The claim of the alternative hypothesis is that the mean annual income is different in County A and County B.

The null hypothesis is that the mean annual income is equal in both counties.

The significance level is α=0.10.

The sample from County A has a mean of S40,400, a s.d. of $8,700 and a sample size of 18 residents.

The sample from County B has a mean of S39,200, a s.d. of $6,000 and a sample size of 8 residents.

The standard error of the difference of means is:

$\sigma_d=\sqrt{\frac{\sigma_a^2}{n_a}+\frac{\sigma_b^2}{n_b}}=\sqrt{\frac{8700^2}{18}+\frac{6000^2}{8}}=\sqrt{8705000}=2950$

The degrees of freedom are:

$df=n_a+n_b-2=18+8-2=24$

Then, the test statistic is:

$t=\frac{\Delta M-\Delta \mu}{\sigma_d} =\frac{(40,400-39,200)-0}{2950} =\frac{1200}{2950}=0.407$

For a statistic t=0.407, and df=24, the P-value is P=0.69. As the P-value is bigger than the significance level, the null hypothesis failed to be rejected.

If we would use the critial value approach, we would have to calculate the critical values for t, for df=24, two sided test and α=0.10.

The critical values, looking in a table, are t=1.711.

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3 years ago