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3 years ago

Please help need a 100

Mathematics

1 answer:

mixer [17]3 years ago

3 0

Hello!

$\sqrt{ {9} {x}^{8} {y}^{2} } = 3{x}^{4}{y}$

Will be. :)

1/2 = Square root

Then.. :)

$\sqrt{3 {x}^{4}y } = \sqrt{3y} {x}^{2}$

Or,

$( {3y})^{ \frac{1}{2} } {x}^{2}$

So, Answer : D

Have a nice day!

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A scale drawing of a park is 1 inch equal to 15 feet. What is the actual area of the park?

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Answer:

Step-by-step explanation:

To get the current area of the park you must multiply by 15 the number of inches indicated on the map.

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3 years ago

Hello people can you help me with dis two question

____ [38]

Answer

length = 11 in

width = 6in

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2 years ago

A 15 ounce alloy containing 30% gold was mixed with an alloy containing 5% gold to get an alloy containing 20% gold. How many ou

Studentka2010 [4]

Answer:

4.5 % alloy

Step-by-step explanation:

Let x = amt of 30% alloy

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(25-x) = amt of 5% alloy:

A typical mixture equation:

.30x + .05(25-x) = .20(25)

.30x + 1.25 - .05x = 5 .30x - .05x = 5 - 1.25

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x = 3.75%2F.25

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then

25-15 = 10 oz of 5% alloy:

Check solution

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3 years ago

In ΔXYZ, x = 8.3 meters, y = 9 meters, and z = 15 meters. Find the remaining measurements of the triangle, and round your answer

laila [671]

Answer:

<u>The correct answer is B. ∠X = 28.6°, ∠Y = 31.2°, ∠Z = 120.2°</u>

Step-by-step explanation:

Let's recall that for solving a SSS triangle, we :

1. Use the Law of Cosines first to calculate one of the angles

2. Use The Law of Cosines again to find another angle

3. Finally use angles of a triangle add to 180° to find the last angle.

1. Cos x = (9² + 15² - 8.3²/2 * 9 * 15)

Cos x = (81 + 225 - 68.89/270)

Cos x = 0.878

x = Cos ⁻¹ (0.878)

x = 28.6° (rounding to the next tenth)

2. Cos y = (8.3² + 15² - 9²/2 * 8.3 * 15)

Cos y = (68.89 + 225 - 81/249)

Cos y = 0.855

x = Cos ⁻¹ (0.855)

x = 31.2° (rounding to the next tenth)

3. z = 180 - 31.2 - 28.6

z = 120.2°

<u>The correct answer is B. ∠X = 28.6°, ∠Y = 31.2°, ∠Z = 120.2°</u>

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3 years ago