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Delvig [45]
3 years ago
13

Please solve this will mark brainlist

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
6 0

Answer:

9 + (-4) & 9 - 4

Step-by-step explanation:

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2. Does the set of numbers form a Pythagorean triple? Explain.
nevsk [136]
So Pythagorean triples will always work with Pythagoras theorem which is a^2 + b2 = c^2 where c is the hypotenuse. So the biggest number (15) will be the hypotenuse so you must do (9^2) + (12^2) and if it is a triple you will get 15^2 so you do 81 + 144 which is 255 and 15^2 is 255 so therefore it is a Pythagorean triple because the numbers satisfy the equation. Hope this helps :)
7 0
3 years ago
Which one does 3 equal :) <br> Please let me know and why
vivado [14]

Answer:

A

Step-by-step explanation:

The slope is positive, the y intercept is -1/2, and and it's going 8 left and 5 up therefore 8/5

7 0
3 years ago
Eliminate the parameter.<br><br> x = 3 cos t, y = 3 sin t
ElenaW [278]

Answer:

x^2+y^2 = 3^2

Step-by-step explanation:

We need to eliminate the parameter t

Given:

x = 3 cos t

y = 3 sin t

Squaring the above both equations

(x)^2=(3 cos t)^2

(y)^2 =(3 sin t)^2

x^2 = 3^2 cos^2t

y^2=3^2 sin^2t

Now adding both equations

x^2+y^2=3^2 cos^2t+3^2 sin^2t

Taking 3^2 common

x^2+y^2=3^2 (cos^2t+sin^2t)

We know that cos^2t+sin^2t = 1

so, putting the value

x^2+y^2=3^2(1)

x^2+y^2 = 3^2

Hence the parameter t is eliminated.

4 0
3 years ago
What is 4 and 2/3 divided by 7
olchik [2.2K]

Answer:

very easy

Step-by-step explanation:

4(2/3) = 14/3

14/3 ÷ 7

14/3 x 1/7

14/21

2/3

4 0
3 years ago
Select the correct answer from each drop-down menu.
irakobra [83]

Answer:

The length of side AC is 5 units.

The areas of triangle ABC is 10 square units.

Step-by-step explanation:

From point A (1,3) to point C (1,-2) is 5 units

To check this:

3 - (-2) = 3 + 2 =5

We're subtracting since the point went down (from positive 3 to negative 2)

Now for the area:

Area formula for a triangle: \frac{1}{2}bh = \frac{1}{2}⋅b⋅h

We already found the height (length) : 5

The base is from point C (1,-2) to point B (5,-2), which is 4 units

To check this:

5 - 1 = 4

Now that we have found the base and height, Let's solve:

\frac{1}{2}⋅4⋅5 = \frac{1}{2}⋅20 = 10

Our area is 10 square units.

Hope that helps :)

6 0
2 years ago
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