MATHEMATICS MIDDLE SCHOOL

15 + 3t - 5 - 8t what is the ANSWER to this

Answers

Answer 1
Answer: 15+3t−5−8t=15+3t+−5+−8tCombine Like Terms:=15+3t+−5+−8t=(3t+−8t)+(15+−5)=−5t+10Answer:=−5t+10

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MIDDLE SCHOOL

Caden answered 84% of the questions on her science test correctly. If she answered 21 questions correctly, how many questions were on the test? A
25

B
26

C
27

D
28

Answers

Answer: A. 25

explanation:
if you multiply 84% of 25 you will get 21
.84*25=21
HIGH SCHOOL

The picture below shows a pole and its shadow: What is the height of the pole? A.196 B.244 C.388 D.364

Answers

Answer: 364

Step-by-step explanation: a^2+b^2=c^2

27^2+b^2=365^2

729+b=133,225

-

729 cancel that out then

133,225

-

729

————

132,496 squared~ 364

What's the length of the shadow I can't do it without the shadow
COLLEGE

-5 = b - 2.3 what is the neutral number for b

Answers

-5 = b - 2.3 
b = -5 + 2.3
b = -2.7

hope it helps

Answer:

-2.7

Step-by-step explanation:

COLLEGE

The following data were collected from 12 rain gauges in a park. Build a 95% CI for the mean rainfall at the park. 4.65 3.89 2.73 4.35 3.80 4.86 4.33 4.37 4.76 4.05 3.05 3.87

1. Copy the data and paste into Excel. If you use Paste>Paste Special>Text, it should appear in a column.
2. Compute the sample mean and sample standard deviation. Use the function wizard or type =AVERAGE(Data range) and =STDEV.S(Data Range)
3. Find the critical value t* Use the formula for a CI to find upper and lower endpoints

Answers

Answer:

Critical values:

95% confidence interval would be given by (3.646;4.472)

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The data is:

4.65 3.89 2.73 4.35 3.80 4.86 4.33 4.37 4.76 4.05 3.05 3.87

2) Compute the sample mean and sample standard deviation.

In order to calculate the mean and the sample deviation we need to have on mind the following formulas:  

=AVERAGE(4.65,3.89,2.73, 4.35, 3.8, 4.86, 4.33, 4.37, 4.76, 4.05, 3.05, 3.87)

On this case the average is

=STDEV.S(4.65,3.89,2.73, 4.35, 3.8, 4.86, 4.33, 4.37, 4.76, 4.05, 3.05, 3.87)

The sample standard deviation obtained was s=0.6503

3) Find the critical value t* Use the formula for a CI to find upper and lower endpoints

In order to find the critical value we need to take in count that our sample size n =12

MIDDLE SCHOOL

How is a parallelogram different than a rhombus?????

Answers

A rhombus has all sides of equal length, while a parallelogram not necessarily.

MIDDLE SCHOOL

Add (8 - i) + (5 + 4i )

Answers

Answer:

13 + 3i

Step-by-step explanation:

Given

(8 - i) + (5 + 4i) ← remove the parenthesis

= 8 - i + 5 + 4i ← collect like terms

= 13 + 3i

MIDDLE SCHOOL

-7/8k = -21 what number is k?

Answers

K = -21 * (-8/7)
k = 24
MIDDLE SCHOOL

2,605 people at a basketball game. Rounded to the nearest hundred

Answers

The number 2,605, rounded to the nearest hundred us 2,600
MIDDLE SCHOOL

The neck length was recorded for 5 different giraffes.each measurement has been rounded to the nearest 1/2 foot .measuments:5 4 1/2 6 5 6 1/2 . How much longer are the two longest necks than the two shortest necks?

Answers

Answer:

Answer: Difference between two longest and two shortest necks is 3 foot.

Step-by-step explanation:

Five giraffes having five different neck lengths as

Giraffe (1) = 5 foot

Giraffe (2) = 4.5 foot

Giraffe (3) = 6 foot

Giraffe (4) = 5 foot

Giraffe (5) = 6.5 foot

Now in the given question difference between two longest necks and two shortest necks were asked.

So total length of tow necks are Giraffe(3)+Giraffe(5)= 6+6.5 = 12.5 foot

Now total length of two shortest necks are Giraffe(2)+Giraffe(1) or Giraffe(4)= 4.5+5 = 9.5 foot

Difference between two longest and two shortest necks will be = 12.5-9.5 =3 foot.



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