Answer:
60
Step-by-step explanation:
The mean of a set of numbers is calculated by adding them all together and then dividing the sum by the amount of values in the data set. In this scenario, we know the mean is 30, and there are 3 numbers in the data set, 10, 20, and an unknown number (x).
Let's set up an equation with the information we have.
30 = (10 + 20 + x) / 3
Now we can multiply both sides by 3 ==>
90 = 10 + 20 + x
Combine like terms ==>
90 = 30 + x
Subtract 30 from each side ==>
60 = x
And now you have your answer!
The value of x = 60 would make the mean of the data set 30.
Hello from MrBillDoesMath!
Answer: y = 2x - 7
Discussion:
Divide both sides of the equation by 2:
2y /2 = (4x-14)/2 = 4x/2 -14/2
or
y = 2x - 7
Thank you,
MrB
Answer:
87 minutes
Step-by-step explanation:
Let the total number of minutes = m
Our equation is given as:
$20.21 = $14.99 + 0.06m
20.21 = 14.99 + 0.06m
Collect like terms
0.06m= 20.21 - 14.99
0.06m = 5.22
m = 5.22/0.06
m = 87
Therefore, the total number rod minutes used is 87 minutes
The garden is a composite figure, and the area of the garden is 105.5 square feet
<h3>How to determine the area?</h3>
The garden is given as an attachment.
From the attached picture, we have the following figures:
- Rectangle: 5 ft by 10 ft
- Trapezoid: Parallel sides = 15 ft and (27 - 5) ft, Height = (10 - 7) ft
The area of the garden is:
Area = Area of rectangle + Area of trapezoid
So, we have:
Area = 5 * 10 + 0.5 * (15 + 27 - 5) * (10 - 7)
Evaluate
Area = 105.5
Hence, the area of the garden is 105.5 square feet
Read more about composite figures at:
brainly.com/question/21135654
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Are..... larger than the two sides and.....is equal to √(a^2+b^2) !!
