4. because it is reduced and the simplest to understand
The ratio is 9/12 and you can write it as a proportion. so you multiply 9 by 100 then divide it by 12. answer is 75% chance
Put 5 where x is and do the arithmetic.
f(5) = 5^2 +2*5
f(5) = 25 +10 . . . . . evaluate the products
f(5) = 35 . . . . . . . . evaluate the sum
False because that is absolute value so x can be -3 or 3. So the answer is false.