Answer: C, D, D
Step-by-step explanation:
QUESTION 2
An integer is a whole number, and a "real number" is any number that is rational or irrational or an integer.
With respect to this question,
A. Is not an integer. The square root of 7 is an irrational number, which basically means that its a long decimal and can't be written as a fraction. Perfect squares are numbers in which the square roots are whole numbers, with no decimals.
B. Is not an integer. 0.15 sis not a whole number, and in order to be an integer, it must be a whole number.
C. Is an integer. It is a whole number. Note that negative numbers can be integers, as long as they are still whole numbers.
D. is not an integer; its a fraction.
So the answer is C.
QUESTION 3
Irrational numbers cannot be written as fractions, and an easy way to identify them is to see if they are written as long decimals.
A. Perfect square, has to be rational
B. Is wrong because its square root is 5, and 5 is rational
C. Perfect square, has to be rational
D. is right because its not a perfect square
Answer= D
QUESTION 4
Answer= D, because all integers are whole numbers and can be written like fractions .
I hope this is correct :)) Brainliest would be appreciated, i worked pretty hard for this :D
