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4 years ago

URGENT!!!!!! WILL MARK BRAINLIST!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

zysi [14]4 years ago

4 0

Answer:

45 dollars

Step-by-step explanation:

90/2 equals 45

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3(x - 4) + 9 = 18 Step by step (and explanation)

Andrews [41]

Answer:

= 7

Step-by-step explanation:

3(x−4)+9=18

3 − 1 2 + 9 = 1 8

3 − 3 = 1 8

3 = 1 8+3

3 = 21

x= 21/3

x=7

3 0

3 years ago

A Bag of Halloween Candy weighs 4.7 pounds, how much would 3.4 bags weigh

lyudmila [28]

You could multiply the two numbers to get a product of 15.98 pounds.

7 0

3 years ago

What is this 4x+1 all over 3 =11

hjlf

$\frac{4x+1}{3} =11\\\\4x+1 = 33\\\\4x=32\\\\x=8$

3 0

3 years ago

Calculating the degrees of freedom, the sample variance, and the estimated standard error for evaluations using the t statistic

Yuliya22 [10]

Answer:

a) For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

$df = n-1= 10-1=9$

d.9

b) $s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15$

a.15

c) For this case we have the sample size n = 25 and the sample variance is $s^2 =400$ , the standard error can founded with this formula:

$SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80$

Step-by-step explanation:

Part a

For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

$df = n-1= 10-1=9$

d.9

Part b

From a sample we know that n=41 and SS= 600, where SS represent the sum of quares given by:

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

And the sample variance for this case can be calculated from this formula:

$s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15$

a.15

Part c

For this case we have the sample size n = 25 and the sample variance is $s^2 =400$ , the standard error can founded with this formula:

$SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80$

8 0

3 years ago

Find the length of segment GH. 21 12 F

jek_recluse [69]

Answer:

GH = 9

Step-by-step explanation:

FH=FG+GH

21= 12+GH

GH = 21-12 =9

I hope I helped you^_^

6 0

3 years ago