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Len [333]
2 years ago
15

Multiplication and addition

Mathematics
2 answers:
Ede4ka [16]2 years ago
8 0

Answer:

division and subtraction

Step-by-step explanation:

klemol [59]2 years ago
4 0

Answer:

ok! what do u need help on???

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Which statement is true about the angles?
liq [111]

Complete Question:

Triangle abc has the angle mesausres shown.

m<A = (2x)°

m<B = (5x)°

m<C = (11x)°

Which statement is true about the angles?

A. m<A = 20°

B. m<B = 60°

C. m<A and m<B are complementary

D. m<A + m<C = 120°

Answer:

A. m<A = 20°

Step-by-step explanation:

m<A + m<B + m<C = 180° (sum of interior angles of a triangle)

2x + 5x + 11x = 180 (substitution)

Solve for x. Add like terms.

18x = 180

Divide both sides by 18

\frac{18x}{18} = \frac{180}{18}

x = 10

Find the measure of each angle by substituting x = 10:

m<A = (2x)° = 2(10) = 20°

m<B = (5x)° = 5(10) = 50°

m<C = (11x)° = 11(10) = 110°

Therefore, the only true statement is:

A. m<A = 20°

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2 years ago
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Neko [114]

Answer:

abc  = edc. Yes

Step-by-step explanation:

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Ruby drove 168 miles in 3 hours.
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Answer:

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Step-by-step explanation:

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2 years ago
The general form of an interval estimate of a population mean or population proportion is the _____ plus and minus the _____. le
vodomira [7]

Answer:

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

Where :

\hat p represent the point of estimate

And ME = z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}} represent the margin of error

For this reason the confidence interval is the point of estimates plus/minus the margin of error

D.) ​point estimate, margin of error

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

Where :

\hat p represent the point of estimate

And ME = z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}} represent the margin of error

For this reason the confidence interval is the point of estimates plus/minus the margin of error

D.) ​point estimate, margin of error

4 0
3 years ago
Multiply 2x(x^2 + 5)
Helen [10]
2x^3 + 10x (you distribute 2x to x^2 and 5)
6 0
3 years ago
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