Answer:
<h2>x=(y-105)/7</h2>
Step-by-step explanation:
Given that the total time taken to practice is given by the expression as
y=7(15+x)
Simplifying the expression we have
y=105+7x
Solving for x (that is making x subject of formula we have)
7x=y-105
Divide both sides by 7 we have
x=(y-105)/7
Therefore the expression is
x=(y-105)/7
Answer:
19 keyboards
Step-by-step explanation:
Let d = thumb drives; and k = computer keyboards
Total number of sales of thumb drives and keyboards is 50
50 = d + k
Rearranged:
d = 50 - k
Total revenue from the sale of $24 thumb drives and $49 keyboards is $1675
1675 = 24d + 49k
Sub in d = 50 - k
1675 = 24(50 - k) + 49k
1675 = 1200 - 24k + 49k
475 = 25k
k = 475/25
k = 19
(To check, d = 50 - 19 = 31)
The correct answer is 25%
<h3>
What is Relative Frequency?</h3>
- The number of times an event occurs divided by the total number of events occurring in a given data.
<h3>How to solve the problem?</h3>
- This problem can be solved by following steps.
- The data of color and frequency is given in table.
- We need find the relative frequency for Purple
First calculate the the total number of frequency
18+20+10+16
= 64
The total number of frequency is 64
Hence the relative frequency of purple is 16/64
Therefore , relative frequency of purple is 1/4 = 0.25
Therefore 25% of purple candies are there
Learn more about Relative frequency here
brainly.com/question/3857836
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Answer:
Step-by-step explanation:
The formula for the perimeter of a rectangle is:
We know that the length l is w+9. Substitute:
Combine like terms:
Simplify:
And that's our expression :)
And we're done!
