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Gwar [14]
3 years ago
15

The difference of the squares of twenty and thirteen

Mathematics
1 answer:
sineoko [7]3 years ago
5 0
20 squared = 400
13 squared = 169
 400
-139

(231)
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7x - y = - 1 + -7x + 3y = - 25
Fittoniya [83]
Hope this helps you out :D

It’s 2 equations so in order to solve the previous system, you can use different methods, as for example substitution or addition of equations. In this case, you use the second one, due to the fact you have 7x in one equation and -7x in the other equation. In this way you can easily eliminate variable x and then solve for y. With the value of y you can replace in any of the two equations and solve for x.

7x-y=-1
-7x+3y=-25

Summarizing, you proceed as follow:
- add up the given equations

7x - y = -1

-7x+3y=-25
——————
0 +2y=-26

- solve for y in the previous equation

2y=-26
y=-26/2
y=-13


- replace the obtained value of y in one of the given equations, and solve for x

7x-(-13)=-1

7x+13=-1

7x=-1-13

7x=-14

x=-14

x=-14/7

x=-2


Hence, the solution of the given systems of equation is:

X=-2

Y=-13

4 0
3 years ago
Instructions: Find the measure of the indicated angle to the nearest degree.
sweet-ann [11.9K]

The measure of the indicated angle to the nearest degree is 47°.

<h3>What is the measure of the angle?</h3>

Given the data in the question;

  • Adjacent = 36
  • Hypotenuse = 53
  • Angle θ = ?

From trigonometric ratio, Cosθ = Adjacent / Hypotenuse

Cosθ = 36/53

θ = cos⁻¹( 36/53 )

θ = 47°

Therefore, the measure of the indicated angle to the nearest degree is 47°.

Learn more about trigonometric ratio here: brainly.com/question/28016662

#SPJ1

4 0
2 years ago
The question is in the screenshot
Licemer1 [7]

Answer:

calculator soup will help you with this one

Step-by-step explanation:

3 0
3 years ago
Find the angle measure x in the given figure. <br> 70° <br> 45° <br> 60° <br> 55°
oee [108]

The inside angles of a 4 sided shape when added together equal 360.

X = 360 - 50-130-120

X = 60 degrees.

4 0
3 years ago
Read 2 more answers
Please help me with this problem!!
Ghella [55]
It’s 2 times the variable
4 0
3 years ago
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