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34kurt
2 years ago
7

PLEASE HELP WITH MATH (50 POINTS)

Mathematics
1 answer:
slega [8]2 years ago
4 0

Answer:

1st question = 27 degrees

Step-by-step explanation:

Angles in a circle add up to 360 degrees

2x +21 +5x + 6+ 90+ 54 = 360

7x + 171 = 360

7x = 189

x = 27 degrees

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What is the domain of the following graph? Please don't put links down I cant download them.
rosijanka [135]

Answer:

-infinity, infinity

Step-by-step explanation:

Domain is x, and in a quadratic equation like this one the x axis goes on forever. So the first answer of -infinity, infinity is correct.

8 0
3 years ago
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4x+12=−2x<br><br> i need help my stoopid math teacher is mean...
ehidna [41]

Answer:

-2=x

Step-by-step explanation:

4x+12=-2x

Subtract 4x on both sides

12=-6x

Divided by -6 on both sides

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3 0
3 years ago
Evaluate composite functions
Vlada [557]

Answer:

2

Step-by-step explanation:

Step 1: Write out equation g(f(a))

1/√a

Step 2: Plug in 0.25 for <em>a</em>

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You answer should be 2

5 0
2 years ago
What digit is in the ten-thousands place in the number 81,473
Ugo [173]

Answer:

8

Explanation:

8 - Ten-Thousands

1 - Thousands

4 - Hundreds

7 - Tens

3 - Ones

3 0
3 years ago
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HELP ME PLZZZZ!!!!!<br><br><br> It’s just 21 and 22
galina1969 [7]

Answer:

21) 12 cm

22) 5.9 cm

Step-by-step explanation:

21) The base is 10, and if the other two sides are congruent and the perimeter is 36, we can figure out with simple algebra that the sides are 13 cm long.

Half of 10 is 5, so we can use the pythagorean theorem.

5^2+x^2=13^2

Rearranging the variables we have 169-25=x^2

144=x^2

x can be plus or minus 12, but since negative length is impossible we find that x is positive 12 cm.

22) We want to use sine, because we have opposite and hypotenuse. A simple and easy way to memorize this is the SohCahToa method. If we have opposite (O) and hypotenuse (H) we have OH. Soh has the letters O and H, and the S means we should use sine.

sine 36=a/10

Plug this into a calculator or desmos scientific calculator to get a=5.9

7 0
3 years ago
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