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NemiM [27]
3 years ago
12

Solve for s.

Mathematics
2 answers:
Leya [2.2K]3 years ago
4 0

Answer:

=14

Step-by-step explanation:

andre [41]3 years ago
3 0
2/3s+5/6s=21
If you do the problem without the variable the equation equals 1.5.
After I did that I divided 21 with 1.5 then it had come to a total of 14.
After that I decided to plug in 14 in the equation and the total came out to be 21.So s =14
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A survey of shoppers is planned to determine what percentage use credit cards. prior surveys suggest​ 63% of shoppers use credit
Alona [7]
We would need a sample size of 560.

We first calculate the z-score associated. with this level of confidence:
Convert 95% to a decimal:  95% = 95/100 = 0.95
Subtract from 1:  1-0.95 = 0.05
Divide by 2:  0.05/2 = 0.025
Subtract from 1:  1-0.025 = 0.975

Using a z-table (http://www.z-table.com) we see that this is associated with a z-score of 1.96.

The margin of error, ME, is given by:
ME=z*\sqrt{\frac{\hat{p}(1-\hat{p})}{n}}

We want ME to be 4%; 4% = 4/100 = 0.04.  Substituting this into our equation, as well as our proportion and z-score,
0.04=1.96\sqrt{\frac{0.63(1-0.63)}{n}}
\\
\\\text{Dividing both sides by 1.96,}
\\
\\\frac{0.04}{1.96}=\sqrt{\frac{0.63(0.37)}{n}}
\\
\\\text{Squaring both sides,}
\\
\\(\frac{0.04}{1.96})^2=\frac{0.63(0.37)}{n}
\\
\\\text{Multiplying both sides by n,}
\\
\\n(\frac{0.04}{1.96})^2=0.63(0.37)
\\
\\n(\frac{0.04}{1.96})^2=0.2331
\\
\\\text{Isolating n,}
\\
\\n=\frac{0.2331}{(\frac{0.04}{1.96})^2}=559.67\approx560
3 0
3 years ago
Jim, Dora, Ada, and Kim together placed a total of 60 cupcakes on a tray. Jim placed 0.45 of the cupcakes, Dora placed 10of the
Zigmanuir [339]
Jim- 60× .45= 27
Dora- 10 of the 60
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Jim placed the most with 27
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3 years ago
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Answer:

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=106

Step-by-step explanation:

Apply the BEDMAS rule

B=brackets

E=exponents

D=Division

M=multiplication

A=addition

S=subtraction

8 0
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LenKa [72]

Answer:

C

Step-by-step explanation:

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