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3 years ago

Perform the indicated operation.

Mathematics

1 answer:

rewona [7]3 years ago

6 0

Answer:

your answer should be 7 1/24

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Estimate the value of 98.5*13

Nikitich [7]

The answer is 1280.5

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2 years ago

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How wide is the hole at ground level on the drawing

Bumek [7]

Answer:

It’s going by 2

Step-by-step explanation:

If you go up it goes to negative and if you go down it goes to positive

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3 years ago

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Two airplanes are flying in the air at the same height. Airplane A is flying east at 300mi/h and airplane B is flying north at 2

Ipatiy [6.2K]

Answer:

$\frac{dAB}{dt}=340 mil/h$

Step-by-step explanation:

The change of distance over time of the plain A is 300 mi/hour and 200 mi/hour for plane B. O is the point of the airport.

So, the distance from A to O AO = 90 miles and BO = 120 miles.

Now, we have a right triangle here. We can use the Pythagorean theorem, so the distance between the planes will be:

$AB^{2} =AO^{2}+BO^{2}$ (1)

$AB =\sqrt{AO^{2}+BO^{2}}=$

$AB =\sqrt{90^{2}+120^{2}}=150 miles$

If we take the derivative of the equation (1) we could find the change of the distance between planes.

$2AB\frac{dAB}{dt}=2AO\frac{dAO}{dt}+2BO\frac{dBO}{dt}$

$2*150\frac{dAB}{dt}=2*90*300+2*120*200=102000 mil/h$

$\frac{dAB}{dt}=\frac{102000}{150*2}$

Finally,

$\frac{dAB}{dt}=340 mil/h$

I hope it helps you!

6 0

2 years ago

Describe the square roots of numbers using 2 sentences.

slava [35]

Answer:

Square roots of numbers less than 1 are between 0 and 1, while square roots of numbers greater than 1 are greater than 1. For numbers between 0 and 1, the square root is greater than the number; for numbers larger than 1, the square root is less than the number.

Step-by-step explanation:

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2 years ago

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What is -2 1/8 divided by 1 1/4

damaskus [11]

Answer:

-17/10 ( or 1 7/10)

Step-by-step explanation:

-2 1/8 ÷ 1 1/4 (convert into improper fractions)

= (-17/8) ÷ (5/4)

= (-17/8) x (4/5)

= - (17 x 4) / (8 x 5)

= -68/40

= -17/10 ( or 1 7/10)

4 0

3 years ago