Mathematics: 50% of one-twentieth of the product of 12 and 5z + 5.

50% of one-twentieth of the product of 12 and 5z +

Ответ:

kb0767729

10.03.2022

Mathematics

$\frac{3}{2}$ z + $\frac{3}{2}$

Step-by-step explanation:

the product of 12 and 5z + 5 = 12(5z + 5) = 60z + 60

$\frac{1}{20}$ (60z + 60) = 3z + 3

50% = $\frac{1}{2}$ , hence

$\frac{1}{2}$ (3z + 3) = $\frac{3}{2}$ z + $\frac{3}{2}$

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Ответ:

Clup0211

28.01.2022

Mathematics

Is an identity

Step-by-step explanation:

If you need to verify an identity, you have to replace some values to x, like 30, 60, and if the both sides of the equation has the same result, they are an identity.

Then:

Remember that cotx=1/tanx

cot((x-pi)/2)=1/[tan((x-pi)/2)]

You can rewrite the original equation:

1/[tan((x-pi)/2)]=-tanx

Taking values for x and replacing:

x=30

1/[tan((30-pi)/2)]=-tan30

6,405=6,406; the same result in both sides

x=60

1/[tan((60-pi)/2)]=-tan60

-0,32=-0,32; the same result in both sides

It is an identity.

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50% of one-twentieth of the product of 12 and 5z + 5.

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