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nirvana33 [79]
3 years ago
5

Can someone help me pls use this idea to add 5x^2+2x+3: +2x^2+7x+1​

Mathematics
1 answer:
Darina [25.2K]3 years ago
5 0
Here you go :) 7x^2 + 9x + 4
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Can someone please answer this question? Someone answered and they deleted their answer, so I need someone else to help me!
blsea [12.9K]

Check the picture below.

now, notice the triangles made, 3 right triangles with legs of 5 and 4 each.

looking at quadrilateral (1), from the leg 5 units long, we have a line with a run of -1 and a rise of 3, from the leg 4 units long, we have a line with a run of 4 and a rise of -1.

Now, quadrilaterals (2) and (4) display the same lengths and rise and runs, which means they're all congruent, quadrilateral (3) has no equal.

so 1 ≅ 2 and 1 ≅ 4.

8 0
2 years ago
Find BC. Round to the nearest tenth
SSSSS [86.1K]
<span>Using LAW OF SINES Round to the nearest tenth. 
Find BC: triangle is laying on it's side with the point to the right point(A).

B to C= 61 degrees
C to A= 23 cm
A to B= 12 degrees
--------------------
If I interpret this correctly:
Angle A = 61º

Angle C = 12º
--> B = 103º
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Side b = 23 cm
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BC is side a, opposite angle A
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23/sin(103) = a/sin(61)
a = 23*sin(61)/sin(103)
a =~ 20.6 cm 

Hope this helped :)</span>
3 0
3 years ago
What's the volume of 1,000 kg of steel in cubic meters?
Blizzard [7]

I don't know for sure, but I think the answer is 200

3 0
2 years ago
Mr. Florean opened an account with deposit of $5,000. The account earned 7.5% annual simple interest. He did not make any additi
Lena [83]

Answer:

4 years

Step-by-step explanation:

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From the formula for simple interest;

I=PRT/100

T= 100 I/PR

T= 100 × 1500/5000 × 7.5

T= 150000/37500

T= 4 years

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3 years ago
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tankabanditka [31]
Fourty and eight tenths as a decimals is 40.8. More than one pounds behind decimal is too much and a different number other than 8 is wrong. The answer is B: 40.8.
4 0
3 years ago
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