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Gemiola [76]
2 years ago
15

What value of x will make the equation below true? 14−(x+7)=3

Mathematics
1 answer:
zalisa [80]2 years ago
7 0
14-x-7=3
7-x=3
-x=-4
x=4
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What is the volume of a cube with side lengths that measure 8 cm?
Nataly_w [17]

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Explanation: Since the length, width, and height of a cube are all equal,

we can find the volume of a cube by multiplying side × side × side.

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In the cube in this problem, we have a side length of 8 cm.

So plugging into the formula, we have (8 cm)³

or (8 cm)(8 cm)(8 cm), which is 512 cm³.

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Which of these scales are equivalent to 3 cm to 4 km?
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3 years ago
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SpyIntel [72]

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No, none of the number need to be 48 for the mean to be 48. To get a mean, you add up all the number and divide it by the amount of numbers.

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6 0
3 years ago
A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past
Volgvan

Answer: We reject the null hypothesis, and we use Normal distribution for the test.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis : H_0:\mu\geq 50000

Alternate hypothesis : H_1:\mu

There  is 5% level of significance.

\bar{X}=46800\\\\\sigma=9800\\\\n=29

So, the test statistic would be

z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{46800-50000}{\dfrac{9800}{\sqrt{29}}}\\\\z=-1.75

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3 years ago
Solve x^2+2x+7=0 using the quadratic formula.
Aneli [31]

Answer:

x=-1\pm \sqrt{6}i

Step-by-step explanation:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

x=\frac{-(2)\pm\sqrt{2^2-4(1)(7)}}{2(1)}

x=\frac{-2\pm\sqrt{4-28}}{2}

x=\frac{-2\pm\sqrt{-24}}{2}

x=\frac{-2\pm\sqrt{-1*24}}{2}

x=\frac{-2\pm\sqrt{-1}\sqrt{24}}{2}

x=\frac{-2\pm i\sqrt{4*6}}{2}

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x=\frac{-2\pm2i\sqrt{6}}{2}

x=-1\pm \sqrt{6}i

5 0
2 years ago
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