Answer:
7/2
Step-by-step explanation:
2x+5=12
2x=7
x=7/2
Answer is C x=1 because that’s the middle of it.
The number -57/ 7 is a rational number.
<h3>What are rational numbers?</h3>
A rational number is a type of real number, in the form of;
p/q
where
- q is not equal to zero
- p is a whole number.
It is important to note that any fraction with a denominators not equal to zero is a rational number
Examples of rational numbers are 1/2, 1/5, 3/4, and so on.
Also, the number “0” is also a rational number, but when it is represented forms such as 0/1, 0/2, 0/3, etc. But, 1/0, 2/0, 3/0, etc. It is not rational
- 57/ 7 is a rational number
Thus, the number -57/ 7 is a rational number.
Learn more about rational numbers here:
brainly.com/question/12088221
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So if there are twenty children and 6 have an average age of five, you could say their total age together is 30 years. The others (20-6) have an age of 8.
30+ (20-6)*8 = total age of every child at the library. From there divide by the number of children.