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3 years ago

The formula C=5/9 (F-32) can be used to convert a temperature from degress Fahrenheit to degress Celsius.

Mathematics

1 answer:

Lina20 [59]3 years ago

4 0

B) 0.56
becouse you only need to divide 5 by 9

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Use the elimination method to solve the following equations<br> 5x+7y=9 <br> 10x+14y=18

kolbaska11 [484]

Answer:

Step-by-step explanation:

10x + 14y = 18.....reduce by dividing everything by 2 and u end up with 5x + 7y = 9

notice how both equations are now the same....means same line.....this means ur solution is : INFINITE SOLUTIONS

8 0

3 years ago

SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is inter

Rama09 [41]

Answer:

The administrator should sample 968 students.

Step-by-step explanation:

We have to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.88}{2} = 0.06$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a p-value of $1 - 0.06 = 0.94$ , so Z = 1.555.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Standard deviation of 300.

This means that $n = 300$

If the administrator would like to limit the margin of error of the 88% confidence interval to 15 points, how many students should the administrator sample?

This is n for which M = 15. So

$M = z\frac{\sigma}{\sqrt{n}}$

$15 = 1.555\frac{300}{\sqrt{n}}$

$15\sqrt{n} = 300*1.555$

Dividing both sides by 15

$\sqrt{n} = 20*1.555$

$(\sqrt{n})^2 = (20*1.555)^2$

$n = 967.2$

Rounding up:

The administrator should sample 968 students.

5 0

2 years ago

Help what is the answer

Gre4nikov [31]

Answer: 24

Work: 4x= 4•12, yz = 8•3, so you have to do 48 (4 times 12) - 24 (8 times 3)

3 0

3 years ago

Read 2 more answers

"Six more than a number doubled is equal to twice a<br> number plus three"

andrey2020 [161]

Given parameters:

This is a word problem. To solve problems, it is best to interpret sentence by sentence;

Six more than a number doubled;

let the number = y ;

so we have 2(y + 6)

equal =

twice a number plus three;

let the number be Z;

2Z + 3

The complete expression is thus; 2(y + 6) = 2Z + 3

4 0

2 years ago

4. Heidi opens a savings account and deposits € 1,500. The bank pays interest on your credit 3.2%. At the end of the year, Heidi

kumpel [21]

Answer:

0.625 years = 7.5 months

Step-by-step explanation:

Simple interest formula = rxtxp divided by 100

R x T x P / 100 = 30

Substitute all the values we know

3.2 x T x 1500/100 = 30

Simplify and rearrange =

3.2 x T x 1500 = 3000

3.2 x T = 2

T = 2/3.2

T = 0.625

6 0

2 years ago