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TEA [102]
3 years ago
5

Please help, multiple choice

Mathematics
1 answer:
klasskru [66]3 years ago
7 0

Answer:

D. 9, 12, 15

Step-by-step explanation:

You can use the Pythagorean Theorem to solve.

a^2 + b^2 = c^2

9^2 + 12^2 = c^2

81 + 144 = 225

Remember, c is squared.

The square root of 225 is 15.

D is the only answer that is correct.

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What expression does -5c=
hjlf
It equals 23 degrees Fahrenheit. So -5c=23f
5 0
4 years ago
Arrange the polynomial so that the powers of x are in descending order.
Aleonysh [2.5K]
8x - 9x²y + 7y² - 2x⁴
-2x⁴ - 9x²y + 8x + 7y²
3 0
3 years ago
I need help with this please
yKpoI14uk [10]
D since it looks pretty difficult
5 0
3 years ago
........................​
shtirl [24]

Answer:

Step-by-step explanation:

Figure (1)

x° = 107° [Vertically opposite angles]

Since, vertical angles are equal in measure.

Figure (2)

x + 71° = 90° [Given, complementary angles]

x = 90° - 71°

x = 19°

Figure (3)

x + 21° = 180° [Given as supplementary angles]

x = 180° - 21°

x = 159°

Figure (4)

x = 129° [Vertical angles]

Figure (5)

x° = 90° [Given]

z° + 34° = 90°

z° = 90° - 34°

z° = 56°

Since, x° + y° + z° = 180° [Linear angles]

90° + y° + 56° = 180°

y° + 146° = 180°

y° = 180° - 146°

y° = 34°

7 0
3 years ago
What is the measure of angle k?
Murljashka [212]

9514 1404 393

Answer:

  59°

Step-by-step explanation:

Opposite angles of an inscribed quadrilateral are supplementary.

  ∠N +∠L = 180°

  (a +16) +(a -18) = 180

  2a = 182 . . . . . . . . . . add 2

  a = 91 . . . . . . . . . . . . divide by 2

Then the measure of angle M is ...

  ∠M = (a+30)° = (91 +30)° = 121°

and angle K is its supplement.

  ∠K = 180° -121°

  ∠K = 59°

8 0
3 years ago
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