3 years ago

X^2+xy=20 and y^2+xy=30 what is xy?

Mathematics

1 answer:

Pie3 years ago

3 0

Its got to be number1

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Deborah has two paintings in her portfolio and paints three more each week.Kai has twelve paintings in her portfolio and paints

elena-14-01-66 [18.8K]

Well, we can set up these equations like this-
Deborah- 2+3w
Kai- 12+2w
w=number of weeks that pass
Now, we set them equal to each other:
2+3w=12+2w

Solve for w
2-12=2w-3w
-10 = -1w
w = 10
10 weeks. Hope this helped!

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3 years ago

Find the missing side lengths. Leave your answers as radicals in simplest form. Please help!! Due today

Nataly_w [17]

Answer:

$m = 10\sqrt 3$

$n = 10$

Step-by-step explanation:

Required

Find m and n

Considering the given angle, we have:

$\sin(60) = \frac{Opposite}{Hypotenuse}$

This gives:

$\sin(60) = \frac{m}{20}$

Make m ths subject

$m = 20 * \sin(60)$

$\sin(60) =\frac{\sqrt 3}{2}$

So, we have:

$m = 20 *\frac{\sqrt 3}{2}$

$m = 10\sqrt 3$

Considering the given angle again, we have:

$\cos(60) = \frac{Adjacent}{Hypotenuse}$

This gives:

$\cos(60) = \frac{n}{20}$

Make n the subject

$n = 20 * \cos(60)$

$\sin(60) =\frac{1}{2}$

So, we have:

$n = 20 *\frac{1}{2}$

$n = 10$

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2 years ago

A game room has a floor that is 120 feet by 75 feet. A scale drawing of the floor on a grid paper uses a scale of 1 unit:5 feet.

valentinak56 [21]

24 units by 15 units. Divide the original feet by 5 to get the units.

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2 years ago

If i make $8.75 per hour, what will my hourly wage be for 14 hours?

Ludmilka [50]

Your wage would be $122.5, (8.75)(14)

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3 years ago

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Kevin wants to buy an area rug for his living room. He would like the area rug to be no smaller that 24 square feet and no bigge

Julli [10]

Answer: 6 feet to 8 feet

Step-by-step explanation: 6x4=24 8x6=48

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2 years ago

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