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DENIUS [597]
3 years ago
6

2. Write and solve an equation to find the value of x. 3.8, 4.2, 5.3, x; mean 4.8

Mathematics
1 answer:
BabaBlast [244]3 years ago
3 0

Answer:

5.9

Step-by-step explanation:

The mean means arithmetic average (some people just say average here).

The average of 4 numbers is the sum of those 4 numbers divided by the number of numbers which is 4 in this case.

So we have this formula:

\frac{3.8+4.2+5.3+x}{4}=4.8

Multiply both sides by 4:

3.8+4.2+5.3+x=4(4.8)

Simplify:

13.3+x=19.2

Subtract 13.3 on both sides:

x=19.2-13.3

Simplify:

x=5.9

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