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ollegr [7]
3 years ago
6

Solve for x 90°, 45°, and x°

Mathematics
1 answer:
statuscvo [17]3 years ago
8 0

Answer:

x= 45

Step-by-step explanation:

In this diagram, there is an angle that is split into 2 angles.

The angle is a 90 degree angle. We know this because of the little square in the corner that denotes a right angle.

Therefore, the 2 angles inside of the right angle must add to 90 degrees. The 2 angles that make up the right angle are x and 45.

x+45=90

We want to find x. We need to get x by itself. 45 is being added on to x. The inverse of addition is subtraction. Subtract 45 from both sides.

x+45-45=90-45

x= 90-45

x=45

The measure of angle x is 45 degrees.

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Use completing the square to solve the equation x^2+16x=-44.
Sidana [21]

Step-by-step explanation:

our equation is x²+16x = -44

  • x²+16x= -44
  • x² is the first term so weill have in the middle 2*x* a number
  • x²+2*x*8 = -44
  • the third term is 8² wich is 64 so we will add it in both sides
  • x²+2*x*8+64 = -44+64
  • (x+8)² = 20

Now that we have completed the perfect square let's solve the equation

  • (x+8)² = 20
  • x+8 = \sqrt{20}or x+8= -\sqrt{20}
  • x = -8+\sqrt{20} or x =  -8- \sqrt{20}

so the first answer is the correct one

64; 8 +/- \sqrt{20}

7 0
3 years ago
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Help me with this question <br>I will mark brainlist <br>no web link <br><br>Solve :-<br>9n²-64=0​
Archy [21]
Factorize

(3n + 8) (3n - 8) = 0
3n + 8 = 0 and 3n - 8 = 0

Solve both for n

3n + 8 = 0
3n = -8
n = -8/3


3n - 8 = 0
3n = 8
n = 8/3

Therefore n = -8/3 and n = 8/3
6 0
2 years ago
Which of the following is a proportional relationship? SELECT ALL THAT APPLY
umka2103 [35]

Answer:

a

Step-by-step explanation:

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4 0
2 years ago
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What are the side lengths of a rectangle if the area = 40 in and the perimeter = 48 in
Serggg [28]
4, 10, 4, 10. 10*4 gives area of 40. 10+10+4+4 gives 48 as shown in question
4 0
3 years ago
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Add.<br> (4x-3) + (2x-4)
Ilya [14]
The answer would be:

6x - 7

I hope this helped you,

Have a great day
3 0
3 years ago
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