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Daniel [21]
3 years ago
7

How do you multiply ​

Mathematics
2 answers:
sergiy2304 [10]3 years ago
7 0

ok so an equation like 2x3 is the same as 2+2+2.

ohaa [14]3 years ago
4 0

Answer:

lets say you where multiplying by 2

2+ 2=4 so that would mean 2x2 is 4

and so on and so on

Step-by-step explanation:

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A piece of wire 23 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral tria
AURORKA [14]

Answer:

For maximum area, all of the wire should be used to construct the square.

The minimum total area is obtained when length of the wire is 10m

Step-by-step explanation:

For maximum,  we use the whole length

For minimum,

supposed the x length was used for the square,

the length of the side of the square = x/4m

Area = \frac{x^{2} }{16}

For the equilateral triangle, the length of the side =  \frac{23 - x}{3}

Area = \frac{\sqrt{3} }{4}  a^{2}  = \frac{\sqrt{3} }{4} (\frac{23 - x}{3} )^{2}

Total Area = \frac{x^{2} }{16}  + \frac{\sqrt{3} }{36} (23-x)^{2}

\frac{dA}{dx}  = \frac{x}{8}  -  \frac{\sqrt{3} }{18} (23 - x)\\

\frac{d^{2}A }{dx^{2} }  = \frac{1}{8}  + \frac{\sqrt{3} }{18}  > 0, therefore it is minimum

\frac{dA}{dx}  = 0 \\\\

\frac{x}{8}  -  \frac{\sqrt{3} }{18} (23 - x) = 0\\

x = 10.00m

3 0
3 years ago
Read 2 more answers
josh has a job mowing lawns. He charges$25 for each yard. He needs at least $400 for the new game system that he wants. write an
Murljashka [212]

25x\geq400

x\geq16

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5 0
3 years ago
What is the measure of angel R ? pls i need help​
matrenka [14]

Answer:

40

Step-by-step explanation:

(120 - 40)/2 = 80/2 = 40

4 0
3 years ago
Find the indicated side of the<br> triangle.<br> b<br> 7<br> 45°<br> a<br> b = [?]VO
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Answer:

7√2

Step-by-step explanation:

Thank to the give angle we can say that the two legs are congruent

b = \sqrt{7^2 + 7^2} = \sqrt{49+49} = \sqrt{98}

98/2 = 49

49/7 = 7

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√98 = 7√2

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3 years ago
Which statement is true? Point estimates are used to make inferences about population parameters. When we use the population mea
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I think the Answer is A.<span>Point estimates are used to make inferences about population parameters</span>
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