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katrin2010 [14]
3 years ago
8

4n+ 0.24 = 15.76 contains decimals step by step please

Mathematics
1 answer:
Jlenok [28]3 years ago
8 0

Answer:

3.88

<h3>1. Subtract both sides by 0.24:</h3>

4n + 0.24 = 15.76

     - 0.24   - 0.24

______________

4n            = 15.52

<h3>2. Divide by 4 on both sides to isolate 'n':</h3>

4n = 15.52

__    ____

4         4  

n = 3.88

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Ella has 0.5 lbs of sugar. How much water should she add to make the following concentrations? Tell Ella how much syrup she will
olya-2409 [2.1K]

Answer:

1. 20% - add 2 lbs of water to get 2.5 lbs of syrup

2. 25% - add 1.5 lbs of water to get 2 lbs of syrup

3. 1.5% - add 32.833 lbs of water to get 33.333 lbs of syrup

Step-by-step explanation:

Ella has 0.5 lbs of sugar. Let x lbs be the amount of water Ella should add to get the syrup.

1. 20% syrup:

0.5 lbs - 20%

x+0.5 lbs - 100%

Write a proportion:

\dfrac{0.5}{x+0.5}=\dfrac{20}{100}\\ \\0.5\cdot 100=(x+0.5)\cdot 20\\ \\50=20x+10\\ \\20x=50-10\\ \\20x=40\\ \\x=2\ lbs

To get 20% syrup Ella should add 2 lbs of water. The total weight of strup is 2.5 lbs.

2. 25% syrup:

0.5 lbs - 25%

x+0.5 lbs - 100%

Write a proportion:

\dfrac{0.5}{x+0.5}=\dfrac{25}{100}\\ \\0.5\cdot 100=(x+0.5)\cdot 25\\ \\50=25x+12.5\\ \\25x=50-12.5\\ \\25x=37.5\\ \\x=1.5\ lbs

To get 25% syrup Ella should add 1.5 lbs of water. The total weight of strup is 2 lbs.

3. 1.5% syrup:

0.5 lbs - 1.5%

x+0.5 lbs - 100%

Write a proportion:

\dfrac{0.5}{x+0.5}=\dfrac{1.5}{100}\\ \\0.5\cdot 100=(x+0.5)\cdot 1.5\\ \\50=1.5x+0.75\\ \\1.5x=50-0.75\\ \\1.5x=49.25\\ \\x=\dfrac{49.25}{1.5}\approx 32.833\ lbs

To get 1.5% syrup Ella should add 32.833 lbs of water. The total weight of strup is 33.333 lbs.

7 0
3 years ago
The quarterly returns for a group of 51 mutual funds are well modeled by a Normal model with a mean of 7.4​% and a standard devi
Wittaler [7]

Answer:

A) x ≥ 0.074; B) x ≥ 0.108; C) x ≤ 0.006; D) 0.04 ≤ x ≤ 0.108

Step-by-step explanation:

68% of data will fall within 1 standard deviation of the mean; 95% of data will fall within 2 standard deviations of the mean; and 99.7% of data will fall within 3 standard deviations of the mean.

Breaking this down, we find that 34% of data fall from the mean to 1 standard deviation above the mean; 13.5% of data fall from 1 standard deviation above the mean to 2 standard deviations above the mean; 2.35% of data fall from 2 standard deviations above the mean to 3 standard deviations above the mean; and 0.15% of data fall above 3 standard deviations above the mean.

The same percentages apply to the standard deviations below the mean.

The highest 50% of data will fall from the mean to the end of the right tail.  This means the inequality for the highest 50% will be x ≥ 0.074, the mean.

The highest 16% of data will fall from 1 standard deviation above the mean to the end of the right tail.  This means the inequality for the highest 16% will be x ≥ 0.074+0.034, or x ≥ 0.108.

The lowest 2.5% of data will fall from 2 standard deviations below the mean to the end of the left tail.  This means the inequality for the lowest 2.5% will be x ≤ 0.074-0.034-0.034, or x ≤ 0.066.

The middle 68% will fall from 1 standard deviation below the mean to 1 standard deviation above the mean; this means the inequality for the middle 68% will be

0.074-0.034 ≤ x ≤ 0.074+0.034, or

0.04 ≤ x ≤ 0.108

8 0
4 years ago
Can you help me find the answer please
Sati [7]

Answer:

349.21875 %

Step-by-step explanation:

if 100 percent of a number is that number than 349.21875 percents of a number is 3 times that number with additional add ons

6 0
3 years ago
The ratio of the measures of the angles in a triangle is 8:3:4. Find the measures of the angles.
Paladinen [302]
Angle 1 = 96
angle 2 = 36
angle 3 = 48
5 0
3 years ago
If n = 6, then the value of n 2 is 12.<br> true or false
Vesna [10]
The answer is false. n^2 would become 6^2 which is equal to 36 not 12

8 0
4 years ago
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