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3 years ago

Will give brainliest 100 points Given: Q = 7m + 3n, R = 11 - 2m, S = n + 5, and T = -m - 3n + 8.

Mathematics

1 answer:

gulaghasi [49]3 years ago

6 0

Answer:

-3m-4n+14 (D)

Step-by-step explanation:

R-S+T=

Substitute the Values given

(11-2m)-(n+5)+(-m-3n+8)=

Open Parenthesis

11-2m-n-5-m-3n+8=

Combine Like Terms

-3m-4n+14

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Ulleksa [173]

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3 years ago

If we wanted to create a new 90% confidence interval from a different sample for the proportion of those with a two on one date

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Answer: 271

Step-by-step explanation:

The formula we use to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

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If prior estimation of the proportion is unknown, then we take p= 0.5 , the formula becomes

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Using z-value table , Two-tailed z-value for significance level of $0.10$

$z_{\alpha/2}=1.645$

Then, the required sample size would be :

$n=0.25(\dfrac{1.645}{0.05})^2$

Simplify,

$n=270.6025\approx271$

Hence, the required minimum sample size =271

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