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Harman [31]
3 years ago
8

your brother is 1.3 your age. your sister is 6 years older tahn your brother.Your sister is 10 years old. Write and solve a equa

tion to find your age a
Mathematics
1 answer:
Papessa [141]3 years ago
4 0

Answer:

My age is 12 years.

Step-by-step explanation:

Given:

Sister's age = 10 years

Let my age be x.

Now according to question;

my brother's age is 1/3 of my age

So brother's age = \frac{1}{3}x

Also according to question;

my sister is 6 years older than my brother;

Sister's age = 6+\frac{1}{3}x

Also given Sister's age = 10 years

hence equation to find my age will be expressed as below;

6+\frac{1}{3}x = 10\\\\\frac{1}{3}x = 10-6\\\\\frac{1}{3}x = 4\\\\\therefore x = 4\times3 = 12

Brothers age = \frac{1}{3}x=\frac{1}{3}\times12=4

Hence my age is 12 years.

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A math class's mean test score is 88.4. The standard deviation is 4.0. If Kimmie scored 85.9, what is her z-score
kvv77 [185]

The z-score of Kimmie is -0.625

<h3>Calculating z-score</h3>

The formula for calculating the z-score is expressed as;

z = x-η/s

where

η is the mean

s is the standard deviation

x is the Kimmie score

Substitute the given parameter

z = 85.9-88.4/4.0

z = -2.5/4.0

z = -0.625

Hence the z-score of Kimmie is -0.625

Learn more on z-score here: brainly.com/question/25638875

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5 0
2 years ago
An equivalent expression to a2/3
scoundrel [369]

Answer:

4/6  6/9  8/12  10/15 and so on, just multiply both the numerator and denominator by the same number and get your answer.

Step-by-step explanation:

6 0
3 years ago
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BaLLatris [955]

Answer: this is difficult


Step-by-step explanation:


6 0
3 years ago
PLEASE HELP ME ASAP ITS TIMED
WINSTONCH [101]

Answer:

The solution is (2, 1).

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Step-by-step explanation:

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Barbara was earning $8.70 per hour when she got a 6% increase in pay .what was the rate of pay after that increase ?
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then we add it to the base salary

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