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hammer [34]
1 year ago
5

The question is:

Mathematics
1 answer:
Naddik [55]1 year ago
7 0

Answer:

2.5 gallons of the 20% solution must be replaced by the 36% solution.

Step-by-step explanation:

.12(20 - x) + .36x = 20(.15)

2.4 - .12x + .36x = 3

2.4 - .24x = 3

- .24x =  - .6

.24x = .6

x = 2.5

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2/3y + v = s solve for y
DanielleElmas [232]

Answer:

y = \frac{3s-3v}{2}

Step-by-step explanation:

Given

\frac{2}{3} y + v = s ( subtract v from both sides )

\frac{2}{3} y = s - v

Multiply through by 3 to clear the fraction

2y = 3s - 3v ( divide both sides by 2 )

y = \frac{3s-3v}{2}

3 0
3 years ago
Solve the equation for (x) and simplify. (7X/6) = (5//2),x
Sunny_sXe [5.5K]
15/7 might be the answer I’m not sure
3 0
2 years ago
You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con
Assoli18 [71]

Question:

You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on constructing a confidence interval; however, you are not sure how many citizens should be included in the sample. If you want your sample estimate to be within 5 years of the actual mean with a confidence level of 97% , how many citizens should be included in your sample? Assume that the standard deviation of the ages of all the citizens in this community is 18 years.

Answer:

61.03

Step-by-step explanation:

Given:

Standard deviation = 18

Sample estimate = 5

Confidence level = 97%

Required:

Find sample size, n.

First find the Z value. Using zscore table

Z-value at a confidence level of 97% = 2.17

To find the sample size, use the formula below:

n = (Z * \frac{\sigma}{E})^2

n = ( 2.17 * \frac{18}{5})^2

n = (2.17 * 3.6)^2

n = (7.812)^2

n = 61.03

Sample size = 61.03

4 0
3 years ago
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lawyer [7]
X=50 because 16 × 156.25 is 2500, then decided by 50 is 50
8 0
3 years ago
Based on the tile pattern, find a rule that will give the number of tiles in any figure and use it to find the number of tiles i
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that seems a little, much...

but it would be 149 or 5130

4 0
3 years ago
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