Answer:
x=80
Step-by-step explanation:
To find the average, we take the numbers, add them up. Then divide by the number of terms we added.
Let x= the unknown number
The average =90
Average = (138+40+102+x)/4
90 = (138+40+102+x)/4
Multiply by 4 on each side
90*4 =(138+40+102+x)/4 *4
360 = (138+40+102+x)
Combine like terms
360 = 280 +x
Subtract 280 from each side
360-280 = 280+x-280
80 =x
Answer:
false
Step-by-step explanation:
18 is not = to 21
Answer:
Sound travels 2258 feet in 2 seconds while travelling through air.
Step-by-step explanation:
The volume of the rectangular prism is 1120 yd³.
<h3>What is a prism?</h3>
A prism is a solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.
To calculate the volume of the rectangular prism, we use the formula below.
Formula:
- V = LWH.......... Equation 1
Where:
- V = Volume of the rectangular prism
- L = Length of the prism
- W = Width of the prism
- H = Height of the prism.
From the question,
Given:
- L = 14 yards
- W = 8 yards
- H = 10 yards.
Substitute thee values into equation 1
Hence, The volume of the rectangular prism is 1120 yd³.
Learn more about prism here: brainly.com/question/12691050
Answer:
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