Add 3×+8y-12zand5x-7y+15z help meee

mina [271]

These are chords of a circle, and the equation to solve for any unknowns is to multiply the 2 sections of one chord and set it equal to the mutiplied 2 sections of the other chord. In our case that will look like this: x * 15 = 6 * 5. That's 15x=30. x = 2

7 0

3 years ago

What is (x-8)(x+4)+(x-3)(x+9)? A: 2x²-2x-59 B: 2x²+2x-59 C: x²-2x-59 D: x²+2x-59

Vikki [24]

Answer:

The answer is B. 2x^2 + 2- 59

Step-by-step explanation:

When you simplify (X-8)(x+4)+(x-3)(x+9) your will get the answer i got.

I hope ive helped you :)

3 0

3 years ago

If a(x) = 2x - 4 and b(x) = x + 2, which of the following expressions produces a quadratic function?

Yakvenalex [24]

Answer:

(ab)(x)

Step-by-step explanation:

The sum or difference of two linear functions will be a linear function. The product of two linear functions will be a quadratic function.

3 0

3 years ago

Dada la ecuacion 25x2 + 4y2 = 100, determina las coordenadas de los vertices, focos, las longitudes de los respectivos ejes mayo

Likurg_2 [28]

Answer:

The given equation is

$25x^{2} +4y^{2}=100$

Which represents an elipse.

To find its elements, we need to divide the equation by 100

$\frac{25x^{2} +4y^{2} }{100} =\frac{100}{100} \\\frac{x^{2} }{4} +\frac{y^{2} }{25} =1$

Where $a^{2} =25$ and $b^{2}=4$ . Remember that the greatest denominator is $a$ , and the least is $b$ . So, we extract the square root on each equation.

$a=5$ and $b=2$ .

In a elipse, we have a major axis and a minor axis. In this case, the major axis is vertical and the minor axis is horizontal, that means this is a vertical elipse.

The length of the major axis is $2a=2(5)=10$ .