3 years ago

Simplify 7 + (−3). plz help

Mathematics

1 answer:

bogdanovich [222]3 years ago

3 0

The answer is 4. 7+(-3) is like 7 minus 3.

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Find the volume of a sphere with a radius of 6 inches. Round your answer to the nearest tenth.

natima [27]

Answer:

V= 904.78

Step-by-step explanation:

formula- V= 4/3(pi) • r^3

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2 years ago

Evaluate 1 3 m − 1 − 1 2 n 3 1 m−1− 2 1 nstart fraction, 1, divided by, 3, end fraction, m, minus, 1, minus, start fraction,

luda_lava [24]

Answer:

Step-by-step explanation:

Apparently, you want the value of ...

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The value of the given expression for the given variable values is zero.

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2 years ago

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence i

Pavlova-9 [17]

Answer:

$\bar X = \frac{Lower +Upper}{2}$

$\bar X= \frac{1.9+3.3}{2}= 2.6$

And the margin of error with this one:

$\bar X = \frac{Upper-Lower}{2}$

$ME = \frac{3.3-1.9}{2}= 0.7$

Step-by-step explanation:

Assuming that the parameter of interest is the sample mean $\mu$ . And we can estimate this parameter with a confidence interval given by this formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

For this case the confidence interval is given by (1.9, 3.3)

Since the confidence interval is symmetrical we can estimate the sample mean with this formula:

$\bar X = \frac{Lower +Upper}{2}$

$\bar X= \frac{1.9+3.3}{2}= 2.6$

And the margin of error with this one:

$\bar X = \frac{Upper-Lower}{2}$

$ME = \frac{3.3-1.9}{2}= 0.7$

7 0

3 years ago

What is 77.2-43.778?<br>what is 2.072 divided by 5.6

Shkiper50 [21]

2.072/5.6= 0.37

77.2- 43.778= 33.422

Hope this helps!

~LENA~

8 0

2 years ago

What is the smaller x and what is the larger x?

kiruha [24]

both are 2

check

2²+3(2)-10=0

4+6-10=0

10-10=0

0=0

6 0

2 years ago