Answer: here u go and can u give me brainliest
Step-by-step explanation:
Tom, Emma, Robin, and Mary earn an average weekly salary of
1 answer:
Tom's weekly salary is $155
Step-by-step explanation:
The given is:
- Tom, Emma, Robin, and Mary earn an average weekly salary of $170 per person
- Tom, Emma, and Robin earn an average weekly salary of $160 per person
- Robin makes $5 more per week than Mary
- Emma's salary is
of Mary's
We need to find Tom's weekly salary
∵ Average average salary = total salaries ÷ number of person
∵ Tom, Emma, Robin, and Mary earn an average weekly salary of
$170 per person
∴ The average = 170 and the number of person = 4
∴ 170 = total salaries of them ÷ 4
- Multiply to sides by 4
∴ 680 = total salaries of them
∴ The total salaries of Tom, Emma, Robin and Mary = $680
∵ Tom, Emma, and Robin earn an average weekly salary of
$160 per person
∴ The average = 160 and the number of person = 3
∴ 140 = total salaries of them ÷ 3
- Multiply to sides by 3
∴ 480 = total salaries of them
∴ The total salaries of Tom, Emma, and Robin = $480
The difference between the 2 total salaries above is the Mary's salary
∴ Mary's salary = 680 - 480 = 200
∴ Mary's salary is $200 per week
∵ Emma's salary is of Mary's
∴ Emma's salary = × 200 = 160
∴ Emma's salary is $160 per week
∵ Robin makes $5 more per week than Mary
∴ Robin's salary = 160 + 5 = 165
∴ Robin's salary is $165 per week
Subtract from the total salaries of Tom, Emma, and Robin the salaries of Emma and Robin to find the salary of Tom
∵ The sum of the salaries of Tom, Emma and Robin = $480
∴ Tom's salary = 480 - 160 - 165 = 155
∴ Tom's salary is $155 per week
Tom's weekly salary is $155
Learn more:
You can learn more about the average in brainly.com/question/9533500
#LearnwithBrainly
You might be interested in
Answer
The answer and procedures of the exercise are attached in the following archives.
Explanation
You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.
Answer:
Option (2). Increasing x > 0; decreasing x < 0
Step-by-step explanation:
Equation of the parabola having vertex (0, 3) will be,
y = (x - 0)² + 3
y = x² + 3
To check the function is increasing or decreasing in the given intervals we will find the derivative of the function,
y' = 2x
For x < 0 Or x = -1
y' = 2(-1)
= -2 < 0
Therefore, function is decreasing in x < 0
For x > 0 Or x = 1
y' = 2(1) + 3
= 5 > 0
Therefore, function is increasing in x > 0
Option (2) is the answer.
Here you go! Hope this helps!
