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tatuchka [14]
3 years ago
13

Erik spends $680 for cable television service. The cable company offers a deal that promises Erik 3 free months of cable if he s

igns a contract with them for $40 per month.
complete the equation below to find th number of months that Erik will have cable television service with his deal. use m to represent the number of months.​
Mathematics
1 answer:
Alex777 [14]3 years ago
3 0

Answer:

20

Step-by-step explanation:

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A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation
Dennis_Churaev [7]

Answer: 95% confidence interval would be (1341.2,1458.8).

Step-by-step explanation:

Since we have given that

n = 64

Average = 1400

Standard deviation = 240

We need to find the 95% confidence interval for SAT scores.

So, z = 1.96

So, Interval would be

\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=1400\pm 1.96\times \dfrac{240}{\sqrt{64}}\\\\=1400\pm 1.96\times \dfrac{240}{8}\\\\=1400\pm 1.96\times 30\\\\=1400\pm 58.8\\\\=(1400-58.8,1400+58.8)\\\\=(1341.2,1458.8)

Hence, 95% confidence interval would be (1341.2,1458.8).

8 0
3 years ago
The sum of two numbers is -18. If the first number is 10, which equation represents this situation, and what is the second numbe
Oksana_A [137]

Answer:

Step-by-step explanation:

8

6 0
3 years ago
Determine whether the two expressions are equivalent. If so, tell what property is applied. If not, explain why. 10 ÷ 5 and 5 ÷
nikklg [1K]

Answer:

no, its not equivalent

Step-by-step explanation:

10/5= 2

5/10=0.5

5 0
2 years ago
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