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3 years ago

What is 3.780 in expanded form? 0 3+7+8 • 3+7+8+0 3,000 + 70 + 8 3,000 + 700 + 80

Mathematics

1 answer:

kompoz [17]3 years ago

3 0

Answer:

3 + 0.7 + 0.08

Step-by-step explanation:

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A)45-(+15)+25-(-5)=? b)-30-(-14)-(-4)=?

olga2289 [7]

Answer:

A) 45-(+15)+25-(-5) = 35

B) -30-(-14)-(-4)= -12

8 0

3 years ago

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Need help asap I’m stuck

qwelly [4]

Answer:

None

since the slopes are equal, it's either infinite or none.

since the ratios of Ys and Xs is 1, 18/16 should be 1 to say we have infinite answers. since it's not, the is no solution at all.

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2 years ago

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Solve the unknown angle measure? Help Any1 ASAP! Will Mark Brainliest!

zlopas [31]

Answer:

X=40°

X=30°

X=50°

Step-by-step explanation:

Let our unknown angles be denoted by $X$

Part I

We are given the sum of the angles as 70°, the known as 30° and the unknown as X;

To find X, we subtract the known angle from the sum as:

X=70°-30°=40°

Hence X= 40°

Part II

We are given the sum of the angles as 70°, the known as 40° and the unknown as X;

To find X, we subtract the known angle from the sum as:

X=70°-40°=30°

Hence X= 30°

Part III

We are given the sum of the angles as 80°, the known as 30° and the unknown as X;

To find X, we subtract the known angle from the sum as:

X=80°-30°=50°

Hence X= 50°

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3 years ago

Find the number of terms in this polynomial. 7g7 + 10g4 – 6g3 + 3g2 - g

Gnoma [55]

Answer:

If you have more than 4 terms you say polynomial with the certain number of terms you have. So the answer to this is polynomial with 5 terms.

Hope this helps.

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3 years ago

The commute times for workers in a city are normally distributed with an unknown population mean and standard deviation. If a ra

Elenna [48]

Answer:

The 95% confidence interval for population mean is (18.19, 23.81).

Step-by-step explanation:

The confidence interval for population mean using the Student's t-distribution is:

$CI=\bar x\pm t_{\alpha /2, (n-1)}\frac{s}{\sqrt{n} }$

Given:

$\bar x=21\\s=6\\n=20\\\alpha =1-0.95=0.05$

The critical value of t for α = 0.05 and degrees of freedom, (n - 1) = 19 is:

$t_{\alpha /2, (n-1)}=t_{0.05/2, 19}=2.093$

Compute the 95% confidence interval for population mean as follows:

$CI=\bar x\pm t_{\alpha /2, (n-1)}\frac{s}{\sqrt{n} }\\=21\pm2.093\times \frac{6}{\sqrt{20} }\\=21\pm2.81\\=(18.19, 23.81)$

Thus, the 95% confidence interval for population mean is (18.19, 23.81).

4 0

3 years ago