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faust18 [17]
2 years ago
10

Whats the sum of -7x*y + 4x^2 - 2 and 4x'y + 1 - 8x^y?

Mathematics
1 answer:
matrenka [14]2 years ago
8 0

Answer:

-7xy+4x^2-8 and y+1-8x^y

Step-by-step explanation:

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Describe a way to make the arithmetic problem 45% x 680 mentally
lord [1]

Answer:

306.

Step-by-step explanation:

Firstly, we are aware 100% of 680 is obviously 680,

Next, we know half of a 100% is 50% therefore half of 680 is 340.

Then, we know 45% is 5% less than 50%

To find 5% of a number mentally, divide it by 10 as 100÷5=20

680÷20=34

Lastly 50% subtracted by 5%: 340-34=306.

Now we know, 45% of 680 is 306.

<em>Hope this helps.</em>

<em>Hope this helps.Please mark BRAINLIEST.</em>

5 0
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8x + 2+ 4y; x = 9, y = 2
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2 years ago
In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probabilit
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22/29

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3 years ago
Which best explains whether a triangle with side lengths 2 in., 5 in., and 4 in. is an acute triangle?
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Step-by-step explanation:

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Compare the following exponential functions: f(x), g(x), and h(x).
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