2 years ago

Find the value of x and 3x.

Mathematics

1 answer:

kozerog [31]2 years ago

3 0

Answer:

x = 90°

3x = 270°

Step-by-step explanation:

Split the shape in half through the plane of 3x and x.

We can find the angle of x/2 is 45°.

Since x/2 = 45°, then we can fid that x=90°.

To find 3x, we simply multiply 90° 3 times.

So 3x = 270°.

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What is the slope of the line that contains the points (-1,-1 and (3,15?

DENIUS [597]

Slope= y2-y1 / x2-x1
slope = 15 - (-1) / 3- (-1)
slope = 16 / 4
slope = 4

7 0

2 years ago

If the age of person A is 7 years more than that of person B and the sum of there ages is 25 years old how old is person A ? (Br

adelina 88 [10]

Answer:

Step-by-step explanation:

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8 0

2 years ago

Read 2 more answers

Anthony is looking to build a rectangular

labwork [276]

7.5

5+5=10
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15/2=7.5

Answer: 7.5 feet

5 0

3 years ago

What is the answer to this??

Helga [31]

Since the triangle is equilateral, all its angles are equal to 60°

AO is the bisector⇒∠OAD = 30°

AO AO is the hypotenuse, ∠OAD = 30°⇒

OD=10:2=5ft

By the Pythagorean theorem

$10^2=AD^2+5^2\\AD=\sqrt{100-25} \\AD=\sqrt{75}$

$AC=AD+DC=2\sqrt{75}=10\sqrt{3}$

$S=\frac{a^2\sqrt{3} }{4}$

$S=\frac{(10\sqrt{3})^2\sqrt{3} }{4} =\frac{300\sqrt{3} }{4} =75\sqrt{3} ft^2$

Answer: A) $S=75\sqrt{3}$ ft²

P.S. Hello from Russia and sorry for my bad english :^)

5 0

3 years ago

Analyze the diagram below and complete the instructions that follow.

Trava [24]

Law of Cosines says

$b^2 = a^2 + c^2 - 2 ac \cos B$

$2 a c \cos B = a^2 + c^2 - b^2$

$\cos B = \dfrac{a^2 + c^2 - b^2}{2 a c}$

$\cos B = \dfrac{16^2 + 16^2 - 11^2}{2(16)(16)} = \dfrac{ 391}{512}$

$B = \arccos \dfrac{ 391}{512} \approx 40.2 ^\circ$

Choice C

5 0

2 years ago