1 tenth of 70kg is if you help thx

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Answer 1

Answer:

it would be 70/100 then it would go down to 7/10 so 1/10 of 70kg would be 7kg because you change 70 you make it a decimal witch is .70 or .7 now make that into a fraction and it would be 70/100 or 7/10 then you take your 7 because its 1/10 of 70. Or you could do it a whole lot easier way and just divide 70 by 10 and get 7. There you have it your answer is 7.

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Brass is an alloy made from copper and zinc in the ratio 3:2, based on weight. If 120g of copper are needed for a certain piece of brass, how much zinc will be needed for the same piece?

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If 120g of copper are needed for a certain piece of brass, then the weight of the zinc that will be needed for the same piece is 80 grams.

What is a Ratio?

A ratio expresses the number of times one number contains another. For example, if a dish of fruit contains eight oranges and six lemons, the orange-to-lemon ratio is eight to six. Similarly, the lemon to orange ratio is 6:8, while the orange to total fruit ratio is 8:14.

Given that Brass is an alloy made from copper and zinc in the ratio 3:2, based on weight. Therefore, the ratio of the metals can be written as,

Copper / Zinc = 3/2

Now, as the weight of the copper is 120grams. Therefore, the ratio can be written as,

Copper / zinc = 3/2

120 grams / zinc = 3/2

zinc = (120 grams × 2) / 3

zinc = 80 grams

Hence, If 120g of copper are needed for a certain piece of brass, then the weight of the zinc that will be needed for the same piece is 80 grams.

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The answer is 80.
You would first, divide 120 by 3.
Then, multiply 40 by 2.

What is the simplest form of the expression (–12.7y – 3.1x) + 5.9y – (4.2y + x)?

Answers

The simplest form of given expression is $-11y-4.1x$ .

What is an expression?

Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between.

Given expression

$(-12.7y-3.1x)+5.9y-(4.2y+x)$

= $-12.7y-3.1x+5.9y-4.2y-x$

Combine like terms

= $(-12.7y+5.9y-4.2y)+(-3.1x-x)$

= $-11y-4.1x$

The simplest form of given expression is $-11y-4.1x$ .

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Answer:

-11y - 4.1x

Step-by-step explanation:

$(-12.7y-3.1x)+5.9y-(4.2y+x)\n\n=-12.7y-3.1x+5.9y-4.2y-x\qquad\text{combine like terms}\n\n=(-12.7y+5.9y-4.2y)+(-3.1x-x)\n\n=-11y-4.1x$

Translate algebraically and simplify.Find the area of a rectangle with a length that is
4 less than 3 times the width X

Answers

Answer:

Step-by-step explanation:

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Explain why a change from 20 to 40 is a 100% increase, but a change from 40 to 20 is a 50% decrease.Increasing 20 to 40 is the same as increasing 20 by c. So, it is a 100% increase. Decreasing 40 to 20 is the same as decreasing 40 by one-half of c. So, it is a 50% decrease.
I don't understand how to fill in the blanks.

Answers

I believe the answer you are looking for is:

Increasing 20 to 40 is the same as increasing 20 by 20 (or itself), so it is a 100% increase. Decreasing 40 to 20 is the same as decreasing 40 by 1/2 or by 20. So it is a 50% increase.

Basically, when going from 20 to 40, the number is being doubled, and when youre going from 40 to 20 you are cutting the number in half.

Answer:

The first blank is 20 and the second is actually 40

Step-by-step explanation:

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Linda is planning to build a rectangular deck that is 12 feet longer than it is wide. Find its width if its area is 589 square feet. Write an equation that models this problem?

Answers

Let the width be x, then the length is x + 12.
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The amounts of industrial waste generated in a region during two years were 31,900,000 tons and 53,400,000 tons. What was the total industrial waste generated over theses two years in the region,expressed in scientific notation

Answers

85,300,000 that's the answer you can put
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