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3 years ago

8

My question is what's

" id="TexFormula1" title=" \frac{x }{5} = \frac{2}{2.5} " alt=" \frac{x }{5} = \frac{2}{2.5} " align="absmiddle" class="latex-formula">
Find what x is

1 answer:

Reptile [31]3 years ago

6 0

Hi, I'd be glad to help you with this equation.

The answer is (x = 4)

Hope this helps.
Have a great day!

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WILL MARK BRAINLIST!!

sergiy2304 [10]

Answer:

66 in.

Step-by-step explanation:

the rectangle has an area of 48in. because 4x11 = 48. The triangles have a base of 6 because 12 ÷ 2=6. the formula for area of a triangle is BxHx1/2 and the height is 3in so 6x3= 18 and 18x1/2=9 and there is two triangles and the other has the same area. Then you add up the area of everything so 48+9+9 = 66

3 0

3 years ago

Give a 98% confidence interval for one population mean, given asample of 28 data points with sample mean 30.0 and sample standar

klio [65]

We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:

$\begin{gathered} 1-\alpha=0.98 \\ \alpha=0.02 \end{gathered}$

The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:

$CI(\mu)=\lbrack x-Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}},x+Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}}\rbrack$

Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:

$CI(\mu)=\lbrack30.0-Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}},30.0+Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}}\rbrack$

Where (from tables):

$Z_{0.99}=2.33$

Finally, the interval at 98% confidence level is:

$CI(\mu)=\lbrack28.94,31.06\rbrack$

4 0

10 months ago

Reiko takes 2 coins at random from the 3 quarters, 5 dimes, and 2 nickels in her pocket. three coins are tossed. what is the pro

I am Lyosha [343]

The answers are 3/8 and 1/6.

There are 8 possible outcomes in the sample space for flipping 3 coins. Of those, 3 include two heads and 1 tail. This makes the probability 3/8.

Choosing a quarter for the first coin is 3/10, since there are 3 quarters out of 10 coins. After this, choosing a dime is given by 5/9, since there are 5 dimes out of 9 coins left:
3/10(5/9) = 15/90 = 1/6

5 0

2 years ago

B-30.45=95.28 what is the answer

mixer [17]

Answer:

$B = 125.73$

Step-by-step explanation:

<u>Step 1: Add 30.45 to both sides</u>

<u /> $B - 30.45=95.28$

$B +(- 30.45 + 30.45)=(95.28 + 30.45)$

$B = 125.73$

Answer: $B = 125.73$

6 0

2 years ago

Two parallel lines are cut by a transversal, as shown below. Solve for b. Then explain your reasoning.

AleksandrR [38]

Answer:

b=14

Step-by-step explanation:

the two labeled angles are vertical angles. according to the vertical angles theorem, they must be equivalent. therefore, we can set them equal to each other and solve.

5b=b+56

4b=56

b=14

5 0

1 year ago

Read 2 more answers