The percentage of students who spend less than 4 hours a week on screens which reported a grade average below 80 is 50%
Given, we have the report representing children spending time online, on social media or watching T.V, which has there effect on there grades as above or below 80.
By the question we know that the number of students who spends less than 4 hours a week on screen is:
9 + 9
= 18
And among the 18 students there are 9 students whose grade average is below 80.
So the percentage of the students who spends 4 hours a week on screen is:
= 9 ÷ 18 × 100%
= 100/2
= 50%
hence 50% students spend less than 4 hours a week on screens.
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Answer:
3 < x < 27
Step-by-step explanation:
15 - 12 < x < 15 + 12
3 < x < 27
Answer: Unlike Terms
Step-by-step explanation:
Both numbers have one same letter which is n, but both are different because the first 8 has m, and the Second 8 has p. So, they're unlike terms.
Answer:
(f - g)(x) = (x+3) – ( x² –2)
= (x+3) + ( - x²+2)
= – x²+x +5
(f -g)(3t) = - (3t)² + (3t)+5
= - 9t²+3t+5
I hope I helped you^_^
