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Verizon [17]
3 years ago
15

Write an equivalent expression for -6(-7+2z) Explain in full steps

Mathematics
2 answers:
alexandr1967 [171]3 years ago
7 0

Answer:

42 - 12z

Step-by-step explanation:

We can find an equivalent expression by using distributive property

Distributive property: whenever there is a number outside of the parenthesis you multiply that number by whatever is in the parenthesis

So for -6(-7+2z) we would multiply the number outside of the parenthesis (-6) by what's inside of the parenthesis ( -7 and 2z )

-6 * -7 = 42

-6 * 2z = -12z

An equivalent expression would be 42 - 12z

Zinaida [17]3 years ago
4 0
42-12z

-6(-7+2z)
42-12z
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3 0
3 years ago
A customer desires to mix her own concrete. The clerk knows that the ratio of cement to sand to gravel is 1:3:4. If the customer
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Answer:

The quantity of cement use is 125 pounds

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Step-by-step explanation:

Given as :

The ratio of cement to sand to gravel = 1 : 3 : 4

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Let The quantity of cement required = 1 × x pounds

The quantity of sand required = 3 × x pounds

The quantity of gravel required = 4 × x pounds

So, According to question

The total quantity of dry mix required = The quantity of cement required + The quantity of sand required + The quantity of gravel required

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Hence The quantity of cement use is 125 pounds

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The quantity of gravel use is 500 pounds

Answer

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