What's 5 + (7 x 8) divided by 3
2 answers:
Answer:
23.67 or
Step-by-step explanation:
You would follow the steps of PEMDAS (parentheses, exponents, multiplication, division, addition, subtraction)
So the first thing we will do is the problem inside the parentheses.
5 + <u>(7 x 8)</u> ÷ 3
5 + 56 ÷ 3
Then we will do the one next in line which is division.
5 + <u>56 ÷ 3</u>
5 + 18.6666...
Finally we should do the addition.
23.6666...
Now since we have a repeating decimal we should round or turn it into a fraction.
23.67 or
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Answer:
Step-by-step explanation:
We have the following variables:
y: hours of sleep
x: age
Each day, a young person should sleep 9 hours
This means that y is 9 added to something
plus 1 4 hour for each year that the person is under 18 years of age.
For each year the person is under 18 years of age, she should sleep 1/4 = 0.25h on top of the 9 hours.
So the equation relating hours of sleep y and age x is: