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Svetradugi [14.3K]
3 years ago
14

10.x / 2-5 = 3 i need help with this

Mathematics
1 answer:
Dmitry [639]3 years ago
7 0
X=-9/10 I believe I hope this helps have a nice day!
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The sum of two numbers is 12. The difference of the same two numbers is −4. Find the two numbers.
Butoxors [25]

Answer:

  4 and 8

Step-by-step explanation:

Let 'a' represent one of the numbers. Then the other is 12-a, and their difference is ...

  a - (12-a) = -4

  2a = 8 . . . . add 12

  a = 4 . . . . . divide by 2

  12-a = 8 . . . . find the other number

The two numbers are 4 and 8.

7 0
3 years ago
Read 2 more answers
Please help and thank you
Scorpion4ik [409]

Answer:

a

Step-by-step explanation:

6 0
2 years ago
Suppose heights of seasonal pine saplings are normally distributed and have a known population standard deviation of 17 millimet
Mumz [18]

Answer:

296.693\leq x\leq 319.307

Step-by-step explanation:

The confidence interval for the population mean x can be calculated as:

x'-z_{\alpha /2}\frac{s}{\sqrt{n} } \leq x\leq x'+z_{\alpha /2}\frac{s}{\sqrt{n} }

Where x' is the sample mean, s is the population standard deviation, n is the sample size and z_{\alpha /2} is the z-score that let a proportion of \alpha /2 on the right tail.

\alpha is calculated as: 100%-99%=1%

So, z_{\alpha/2}=z_{0.005}=2.576

Finally, replacing the values of x' by 308, s by 17, n by 15 and z_{\alpha /2} by 2.576, we get that the confidence interval is:

308-2.576\frac{17}{\sqrt{15} } \leq x\leq 308+2.576\frac{17}{\sqrt{15} }\\308-11.307 \leq x\leq 308+11.307\\296.693\leq x\leq 319.307

6 0
3 years ago
For a field trip 20 students rode in cars and the rest filled 5 busses. How many students were in each bus if 210 students were
xeze [42]
First do 210 - 20 = 190
Then do 190/5 = 38
38 people per bus is the answer!!!!
3 0
3 years ago
Read 2 more answers
The measure of the supplement of an angle is 20° more than three times the measure of the original angle. find the measures of t
viva [34]

If the original angle is x degrees then its supplement is 180 - x degrees.

we have the equation:-

180 - x = 3x + 20

160 = 4x

x = 40

The original angle is 40 degrees and its supplement is 140 degrees

3 0
3 years ago
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