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Maksim231197 [3]
3 years ago
10

If xy = a and x2 + y2 = b, which of the following is equivalent to 9b – 18a ?

Mathematics
1 answer:
Llana [10]3 years ago
5 0

Answer:

  A)  (3x -3y)²

Step-by-step explanation:

9b -18a = 9(x² +y²) -18xy

  = 9x² -18xy +9y²

  = (3x -3y)² . . . . . matches choice A

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What is the domain of f(x) = √√x?
finlep [7]

Answer: All real numbers

Step-by-step explanation:

You can take the cube root of positive and negative numbers, as well as zero.

3 0
2 years ago
Need help please asp thank you so much
Aneli [31]

Answer:

x = -1, 3

Step-by-step explanation:

so what you need to do is graph each one because that's what the questions ask. One way for you to check your answer is to set the two equations equal to each other.

-x + 5 = x^2 - 3x + 2

you want to end up with one equation and having the equation equal 0. So add x to both sides to cancel out the x on the left side and then subtract 5 from both sides to cancel out the 5 on the left side.

0 = x^2 - 2x - 3

now you factor

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4 years ago
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Ilya [14]
D because I looked it up
6 0
3 years ago
1. Find the slope of the line passing through (-3,-4) and (-6,-2).
r-ruslan [8.4K]

Answer:

slope = - \frac{2}{3}

Step-by-step explanation:

Calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 3, - 4) and (x₂, y₂ ) = (- 6, - 2)

m = \frac{-2+4}{-6+3} = \frac{2}{-3} = - \frac{2}{3}

8 0
4 years ago
Read 2 more answers
Given: ΔABC; a= 10; b = 13, and ∠C = 70°. Find the length of side c to the nearest whole number
Alexxandr [17]

Answer:

c=13\ units

Step-by-step explanation:

we know that

Applying the law of cosines

c^2=a^2+b^2-2(a)(b)cos(C)

we have

a=10\ units\\b=13\ units\\C=70\°

substitute

c^2=10^2+13^2-2(10)(13)cos(70\°)

c^2=180.07

c=13\ units

6 0
3 years ago
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