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3 years ago

QUESTION 7

Mathematics

1 answer:

adell [148]3 years ago

8 0

Answer:

The product of an even number and an oven number
The product of an odd number and an odd number
The product of a perfect cube and a perfect cube

Step-by-step explanation:

The product of two even numbers will have at least two factors of 2, so will be even: even numbers are closed under multiplication.

The product of two odd numbers will be an even number plus 1, so will be odd: odd numbers are closed under multiplication.

The product of two cubes will be the cube of the product of their cube roots: cubes are closed under multiplication.

The product of two negative numbers will be positive, so the set of negative numbers is not closed under multiplication.

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8. 36.8 = [11.5 – (2.5 X 3)]2

Anestetic [448]

Answer:

$[11.5-(2.5*3)]^2=16$

Step-by-step explanation:

We want to evaluate $[11.5-(2.5*3)]^2$

Let us evaluate within the parenthesis first:

$[11.5-(2.5*3)]^2=[11.5-(7.5)]^2$

$\implies [11.5-(2.5*3)]^2=[11.5-7.5]^2$

We again subtract within the bracket to obtain:

$[11.5-(2.5*3)]^2=[4]^2$

This finally gives us:

$[11.5-(2.5*3)]^2=16$

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Vaselesa [24]

Answer:

Step-by-step explanation:

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Lesechka [4]

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LekaFEV [45]

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Answer:

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Step-by-step explanation:

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