Here are the answers to the given questions above. The sets of numbers that are closed under multiplication are the following: Whole numbers, and Integers. The answers would be options A and D. Whole numbers are closed<span> only </span>under<span> addition and </span>multiplication. Integers are closed under<span> addition, subtraction, </span>multiplication<span>, and division (with the exception of division by 0). Hope this answer helps.</span>
Answer:
a,d,e and f.
Step-by-step explanation:
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Answer:
f(9) = 72
Step-by-step explanation:
f(9) means what is the value of f(x) when x = 9
9 > 6, thus f(x) = 8x
f(9) = 8 × 9 = 72
Answer:(x+4)(x+5)
Step-by-step explanation:
X^2+9x+20
x^2+5x+4x+20
(x^2+5x)+(4x+20)
x(x+5)+4(x+5)
(x+4)(x+5)