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s2008m [1.1K]
3 years ago
9

4/5 of a number is 16. What is the number?

Mathematics
2 answers:
iris [78.8K]3 years ago
6 0
The answer is 20 I think
Zepler [3.9K]3 years ago
5 0

Answer:

20

Step-by-step explanation:

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you want to make a rectangular dog pen using 20 yards od fencing. The side lengths must be in whole yards. create as many differ
Marina CMI [18]
Rectangular with whole numbers
perimiter=legnth+legnth+width+width=2l+2w
therefor
p=2l+2w=2(l+w)
p/2=l+w

perimiter=20
20=2l+2w
divide by 2 to make simpler
10=l+w
find all combos
l>w so
l=9 and w=1
l=8 and w=2
l=7 and w=3
l=6 and w=4

combos
8 0
3 years ago
What is the value of the expression below <br> (9²)^1/4<br> A. 9<br> B. 1<br> C. 3<br> A. 27
mario62 [17]
(9²)^1/4 = 3


Answer : C. 3
4 0
3 years ago
Give a 98% confidence interval for one population mean, given asample of 28 data points with sample mean 30.0 and sample standar
klio [65]

We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:

\begin{gathered} 1-\alpha=0.98 \\ \alpha=0.02 \end{gathered}

The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:

CI(\mu)=\lbrack x-Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}},x+Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}}\rbrack

Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:

CI(\mu)=\lbrack30.0-Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}},30.0+Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}}\rbrack

Where (from tables):

Z_{0.99}=2.33

Finally, the interval at 98% confidence level is:

CI(\mu)=\lbrack28.94,31.06\rbrack

4 0
1 year ago
Rewrite the function in standard form.<br> f(x)= 3(x + 5)2 - 7
Anna007 [38]
Answer: F= 29
Explanation: first use distributive property and multiplied by three with the parentheses. And then multiply to by what you just solved. Remember to keep writing everything that we haven’t used yet. Then divide both the left side and the 6X by X. Then subtract 30 by 7. And add six. I hope this helped
3 0
2 years ago
Solve for x and y simultaneously <br><br>Pls help me ​
pickupchik [31]

I don't think its possible to do this... you have to have 2 equations

8 0
3 years ago
Read 2 more answers
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