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photoshop1234 [79]
3 years ago
15

Which of the following is an irrational number?

Mathematics
1 answer:
Serhud [2]3 years ago
6 0
A. 1.9 is an irrational number
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150-5r>87.5 Il mark brainliest
Mashutka [201]

Answer:

r < 12.5

Step-by-step explanation:

Given

150 - 5r > 87.5 ( subtract 150 from both sides )

- 5r > - 62.5

Divide both sides by - 5, reversing the symbol as a result of dividing by a negative quantity.

r < 12.5

8 0
3 years ago
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Expand and simplify 9a+3(8-2a).
Zina [86]
9a + 24 - 6a
3a + 24
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Solve for g.<br> 9 - g = 2g
svp [43]

Answer:

g=3

Step-by-step explanation:

9 - g = 2g

+g       +g

9=3g

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8 0
3 years ago
Type the correct answer in each box
Luba_88 [7]

Answer:

We know that the equation of the circle in standard form is equal to <em>(x-h)² + (y-k)² = r²</em> where (h,k) is the center of the circle and r is the radius of the circle.

We have x² + y² + 8x + 22y + 37 = 0, let's get to the standard form :

1 - We first group terms with the same variable :

(x²+8x) + (y²+22y) + 37 = 0

2 - We then move the constant to the opposite side of the equation (don't forget to change the sign !)

(x²+8x) + (y²+22y) = - 37

3 - Do you recall the quadratic identities ? (a+b)² = a² + 2ab + b². Now that's what we are trying to find. We call this process <u><em>"completing the square"</em></u>.

x²+8x = (x²+8x + 4²) - 4² = (x+4)² - 4²

y²+22y = (y²+22y+11²)-11² = (y+11)²-11²

4 - We plug the new values inside our equation :

(x+4)² - 4² + (y+22)² - 11² = -37

(x+4)² + (y+22)² = -37+4²+11²

(x+4)²+(y+22)² = 100

5 - We re-write in standard form :

(x-(-4)²)² + (y - (-22))² = 10²

And now it is easy to identify h and k, h = -4 and k = - 22 and the radius r equal 10. You can now complete the sentence :)

5 0
3 years ago
THIS IS URGENT! PLZ HELP!
Yanka [14]

Answer:

73

Step-by-step explanation:

7 0
3 years ago
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