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3 years ago

90 percent as a fraction in simplest form

1 answer:

6 0

Whenever a number is followed by percent, you can turn it into a fraction by simply moving the decimal places two places to the left:

90.0 % becomes .90

As a fraction, this is 90 over 100. To reduce it to its simplest form, divide by 10:

9/10

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5+5(x+4)<20 help me out thanks for the help

Korolek [52]

= 5+ (5x+20)<20
5x +25<20
5x< -5
x< -1

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3 years ago

Suppose the scores of students on a Statistics course are Normally distributed with a mean of 563 and a standard deviation of 37

ololo11 [35]

Answer:

47.72% of students scored between 563 and 637 on the exam .

Step-by-step explanation:

The percentage of the students scored between 563 and 637 on the exam

= The percentage of the students scored lower than 637 on the exam -

the percentage of the students scored lower than 563 on the exam.

Since 563 is the mean score of students on the Statistics course, 50% of students scored lower than 563. that is P(x<563)=0.5

P(x<637)=P(z<z*) where z* is the z-statistic of the score 637.

z score can be calculated using the formula

z*= $\frac{X-M}{s}$ where

X =637

M is the mean score (563)

s is the standard deviation of the score distribution (37)

Then z*= $\frac{637-563}{37}$ =2

P(z<2)=0.9772, which means that 97.72% of students scored lower than 637 on the exam.

As a Result, 97.72%-50%=47.72% of students scored between 563 and 637 on the exam

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3 years ago

What is the graph of y = |x − 3| + 1

Nostrana [21]

Answer:

Step-by-step explanation:

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3 years ago

You run a ten-kilometer race in 45.5 minutes. Write an inequality for the time of the runners who finished the race after you di

julsineya [31]

Answer:

If a runner is behind you, s/he must have taken longer, so the times of all of the runners who finished after you did must be greater than 45.5 minutes

Step-by-step explanation:

Hmu if you need more help or sum!

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3 years ago

!!!! HELP!!! What is the solution to this system of linear equations?

earnstyle [38]

Answer:

(7, 3)

Step-by-step explanation:

get rid of the y by adding:

x=-2

+x=16

then add the equalities:

2x=14

divide by 2:

x=7

then subsitute the x in to find y!

7+3y=16

3y=16-7

3y=9

y=3

3 0

3 years ago

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