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Gre4nikov [31]
3 years ago
6

Please help.....………………

Mathematics
2 answers:
Alik [6]3 years ago
4 0

Answer:

50°

Step-by-step explanation:

7x - 20 + 4x + 90 = 180

11x = 180 - 70

11x = 110

x = 10

ACB: 7(10) - 20 = 50

nlexa [21]3 years ago
3 0

Answer:

50

Step-by-step explanation:

The sum of the angles of a triangle is 180

A +B +C = 180

90 +4x+ 7x-20 =180

Combine like terms

70+ 11x = 180

Subtract 70 from each side

70-70+11x = 180-70

11x=110

Divide each side by 11

11x/11= 110/11

x = 10

We want to find angle C

C = 7x-20

   = 7*10-20

   = 70-20

   = 50

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Need help thanks in advance
wolverine [178]

Answer:

Period = pi

Angular frequency = 2

Amplitude = 5

Midline is the line y = 3

Step-by-step explanation:

A sinusoidal wave is written in the general form as:

f(x) = A*cos(w*x) + C

Where:

- A is the amplitude.

- w is the angular frequency, this is equal to 2*pi/T

  where T is the period.

- y = C is the midline.

Then in the equation:

f(x) = 5*cos(2*x) + 3

- 5 is the amplitude.

- 2 is the angular frequency (in the image is called frequency, but this quantity must be in radians/time, while the normal frequency is only in Hz)

- We know that the angular frequency is equal to 2*pi/T, whit this eqation we can find the period:

2 = 2*pi/T

T = 2*pi/2 = pi

pi is the period.

- y = 3 is the midline.

3 0
3 years ago
Need answers to these <br> ..x..= 99 +99 <br> 3a+3a=...x3a=.....<br> 3x11+3x19=.....x....
SpyIntel [72]
2x99=99+99
3a+3a=2x3a=6a
3x11+3x19=3x30
4 0
3 years ago
17/22 as a decimal rounded to the nearest hundred
Elenna [48]

Answer: 0.77

Step-by-step explanation:

17/22 = 0.7727

To the nearest hundredth in math means to round off to two decimal places, so here, 2 is less than 5, and so the final answer is

= 0.77

8 0
3 years ago
Solve for x if x = -3. 2x+3
umka21 [38]

Answer:

-3

Step-by-step explanation:

  1. Plug in the value of x: 2(-3) + 3
  2. 2(-3) = 2 × -3 = -6
  3. Plug -6 in: -6 + 3
  4. -6 + 3 = -3

I hope this helps!

8 0
3 years ago
What is the RANGE of the following graph?<br> y=-x2- 2x - 5<br> 2
yan [13]
The range would be the number-
6 0
3 years ago
Read 2 more answers
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