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4 years ago

What is the sum of 6 feet 10 inches and 8 feet 9 inches?

1 answer:

7 0

So we want to know what is the sum of 6 feet 10 inches and 8 feet and 9 inches. To know that we need to know that there are 12 inches in one foot. So lets do the calculation. 6 feet + 8 feet = 14 feet. 10 inches +9 inches = 19 inches or 1 foot and 7 inches. We add 1 foot to our 14 feet and get the result: 15 feet 7 inches.

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0.66

Step-by-step explanation:

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3 years ago

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3 years ago

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Rudiy27

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3 years ago

3+-√(-3)^2 - 4(5)(-1)

Alona [7]

Answer:

Step-by-step explanation:

Easy way to do this is step by step. Your quadratic, from your entry, must be

$5x^2-3x-1$ .

Step by step looks like this, one thing at a time:

$x=\frac{3+\sqrt{(-3)^2-4(5)(-1)} }{2(5)}$ becomes

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and this of course is

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Do the same with the subtraction sign to get the other solution.

If you're unsure of how to enter it into your calculator, do it step by step so you don't mess up the sign. If you enter it incorrectly, you could end up with an imaginary number when it should be real, or a real one that should be imaginary.

Just my advice as a high school math teacher.

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3 years ago

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IrinaK [193]

Answer:

4.8

Step-by-step explanation:

JK is twice as long as LM, so is 4.8 units long.

"Similar" means the sides of one figure have the same ratio as the corresponding sides of the other figure. We see that AB = 2×CD. JK corresponds to AB, and LM corresponds to CD.

We could bother to calculate that sides of JKLM are 1.2 times as long as the corresponding sides of ABCD, but that is not necessary. We only need to find a convenient ratio between the side we want and some other known side. I like a ratio of 2, because it is easy to double a number. We find AB=2CD, so JK=2LM=2×2.4 = 4.8.

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3 years ago

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