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3 years ago

Plsssss I need help with c asap!!!!!!

Mathematics

1 answer:

Solnce55 [7]3 years ago

8 0

The answer is a or b or c or d

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Estimate 8/9 + 4/7<br> Sum or difference

BlackZzzverrR [31]

8/9 + 4/7=1 29/63 ESTIMATE:2
8/9 - 4/7=<span>20/63 ESTIMATE:0

</span>

6 0

3 years ago

A sample of 5 strings of thread is randomly selected and the following thicknesses are measured in millimeters. Give a point est

liq [111]

Answer:

$s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132$

And for the deviation we have:

$s= \sqrt{0.00132}=0.0363$

And that value represent the best estimator for the population deviation since:

$E(s) =\sigma$

Step-by-step explanation:

For this case we have the following data:

1.48,1.45,1.54,1.52,1.52

The first step for this cae is find the sample mean with the following formula:

$\bar X =\frac{\sum_{i=1}^n X_}{n}$

And replacing we got:

$\bar X= \frac{1.48+1.45+1.54+1.52+1.52}{5} = 1.502$

And now we can calculate the sample variance with the following formula:

$s^2 =\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}$

And replacing we got:

$s^2 = \frac{(1.48-1.502)^2 +(1.45-1.502)^2 +(1.54-1.502)^2 +(1.52-1.502)^2 +(1.52-1.502)^2}{5-1} =0.00132$

And for the deviation we have:

$s= \sqrt{0.00132}=0.0363$

And that value represent the best estimator for the population deviation since:

$E(s) =\sigma$

4 0

3 years ago

Read 2 more answers

Convert 38degrees F to degrees celsius. If necessary, round your answer to the nearest tenth of a degree. Here are the formulas.

vekshin1

$F=38 \\ \\C= \frac{5}{9} (F-32)=\frac{5}{9} (38-32)=\frac{5}{9}\times6= \frac{30}{9} \approx 3.33$

8 0

3 years ago

Read 2 more answers

Yesterday, a movie theater sold 262 bags of popcorn. A large bag of popcorn costs $3. A small bag of popcorn costs $1. In al

Snezhnost [94]

Answer:

Small: 178

Large: 84

Step-by-step explanation:

L + S = 262

S = 262 - L

3L + S = 430

3L + 262 - L = 430

2L = 168

L = 84

S = 262 - 84

S = 178

5 0

4 years ago

Read 2 more answers

Find the value of x, circles and angles

lorasvet [3.4K]

Answer:

x = 50

Step-by-step explanation:

When two secants intersect in the interior of a circle, the angles formed are the average of the arc an angle and its vertical intercept. In this case, our angle, 73, should be the average of x and 96. We can translate this to an equation and solve:

$\frac{x+96}{2} = 73$

x + 96 = 146

x = 50

4 0

3 years ago