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2 years ago

Math is hard plz help

Mathematics

2 answers:

Semmy [17]2 years ago

8 0

Answer: 1/q23

Step-by-step explanation:

VMariaS [17]2 years ago

5 0

Answer:

q^3

Step-by-step explanation:

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in a survery of 1000 families it was found that 710 drink tea with breakfast while 230 drink coffee. the families who drink both

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2 years ago

What number is 40% of 90

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3 years ago

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What is an equation of a line that passes through the point (-2 3) and is parallel to the line whose equation is y=3/2x-4?

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3 years ago

What are the zeros of the f(x)=x(x-9)

Vaselesa [24]

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I hope this helps!

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3 years ago

Can anyone plzzzz help me with this question of linear equation in two varaiable plzzzzzz... Its very important... Plz solve it

kotegsom [21]

That's not a linear system, but you have an awesome school system for giving you this problem.

$\dfrac 5 y - \dfrac 2 x = \dfrac{13}6$

Multiply by 6xy to clear the fractions.

$30x - 12y = 13 xy$

That's a second degree equation, also known as a conic. That one happens to be a hyperbola.

$30x = y(13 x +12)$

$y = \dfrac{30x}{13 x + 12}$

Let's clear the fractions from the second equation, multiplying out common denominator xy:

$\dfrac {36} x - \dfrac {24} y = 1$

$36y - 24 x = xy$

We are being asked to find the meet of two hyperbolas, so we expect two answers, a quadratic equation.

Substituting,

$36 \left( \dfrac{30x}{13 x + 12} \right) - 24 x = x \left( \dfrac{30x}{13 x + 12} \right)$

$36(30x) -24 x(13x + 12) = 30x^2$

$1080 x - 312 x^2- 288 x = 30x^2$

$x(792 - 342 x)= 0$

$x = 0 \textrm{ or } x=792/342 = \dfrac{44}{19}$

We have to rule out x=0 because it's in the denominator.

$y = \dfrac{30x}{13 x + 12} = \dfrac{30(44/19)}{13(44/19)+12}$

$y = \dfrac{33}{20}$

Answer: (44/19, 33/20)

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3 years ago