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Nimfa-mama [501]
3 years ago
14

Cathay had saved $335. She spent $15 each week for guitar lessons. She now has $155. Write an equation and solve to find out how

many lesson Cathay had.
Mathematics
1 answer:
Monica [59]3 years ago
6 0
She started out with 335, and spent 15 each week, she now has 155 dollars- that will be our equal sign. 

let m= money she spent each week.

335- 15m= 155

Subtract 335 from 155. 

-15m= -180

Divide -15 into both sides.

m= 12

Cathy had 12 lessons.

I hope this helps!
~kaikers
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For males in a certain town, the systolic blood pressure is normally distributed with a mean of 125 and a standard deviation of
Vilka [71]

The interval of systolic blood pressure will be between 155 to 95

<h3>What is the standard deviation?</h3>

Standard deviation is defined as the amount of variation or the deviation of the numbers from each other.

From the question, we are told that

Mean  x=125

Standard deviation = 10

The Percentage for men =99.75%

Generally, the empirical rule 68%,95% and 99.7% of data value lay b/w 1,2,3 standard deviation of mean  

Standard deviation n= 10

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Generally, the interval  of systolic blood pressure for middle 99.7 of male G is mathematically given as

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G = 155 and 95

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To know more about standard deviation follow

brainly.com/question/475676

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ycow [4]

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