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Ivahew [28]
3 years ago
6

- What are the actual dimensions of the check-out area? Floor Plan of Library 2 cm + 3 cm - 4 cm Study Area Books 7 cm Check-out

Area Scale: 1 cm: 5 m A 25m x 15m © 15m x 35m B 15m x 20m D 2m x 4m ​

Mathematics
1 answer:
user100 [1]3 years ago
6 0

Answer:

sorry I need some points

Step-by-step explanation:

it's an urgent plzz sorry

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If T(n)= 3n-1 what is the third term
irina [24]
T(3)=3(3)-1
T(3)=9-1
T(3)=8

answer is 8
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Are you supposed to put a period at the end of a verbal expression in algebra?
ivann1987 [24]
Nope :) hope this helps!
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2x+10=182 x + 10 = 18 X=
ElenaW [278]
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3 years ago
To assess the accuracy of a laboratory scale, a standard weight that is known to weigh 1 gram is repeatedly weighed 4 times. The
zhannawk [14.2K]

Answer:

(0.9464,1.034)

Step-by-step explanation:

First find the mean μ  of all values as;

(0.95+1.02+ 1.01+ 0.98 ) /4 =0.99

μ=0.99

Find the standard deviation as;

-For each value subtract the mean and square the results

0.95-0.99 = -0.04 , -0.04² = 0.0016

1.02-0.99= 0.03, 0.03²=0.0009

1.01-0.99= 0.02, 0.02²= 0.0004

0.98-0.99 = -0.01, -0.01²=0.0001

Find mean of squared deviations as;

(0.0016+0.0009+0.0004+0.0001)/4 =0.00075 ----variance

Standard deviation = √0.00075 = 0.0274

δ = 0.0274

n=4

Thus n< 30 , confidence interval for μ = x ± t*δ/√n ---------(i)

Degree of freedom (df) = n-1 =4-1 =3

The t value for 95% confidence with df= 3 is t=3.182

Substituting the values in equation (i)

0.99 ± 3.182 * 0.0274/√4

0.99 ± 3.182 * 0.0274/2

0.99 ± 3.182 * 0.0137

0.99 ± 0.0436

(0.9464,1.034)

8 0
3 years ago
Divide. Express the quotient in simplest form.<br> x^2−x−12/2x^2÷x^2+x−6/2x^3
sertanlavr [38]
Hey there!

These are technically expressed as fraction. When you divide a fraction by another, you can replace the second fraction with its reciprocal and you can now multiply the fractions together instead. 

\frac{x^2-x-12}{2x^2} /  \frac{x^2+x-6}{2x^3}

\frac{x^2-x-12}{2x^2} * \frac{2x^3}{x^2+x-6}

Now, just multiply across the top and the bottom. You can first cancel out any terms that are repeated or similar. 

\frac{12}{2x^2} * \frac{2x^3}{-6}

\frac{2}{x} * \frac{1}{-1}

\frac{2}{-x}

Your answer will be \frac{2}{-x}. 

Hope this helped you out! :-)
5 0
3 years ago
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