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2 years ago

PLEASE HELP ME ima dumb and really bad at math :(((( !!

Mathematics

2 answers:

Oksanka [162]2 years ago

8 0

Answer:

-27,0

Step-by-step explanation:

I think, not entirely sure tho.

son4ous [18]2 years ago

3 0

-27 is the answer ...... i might be wrong

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Let u and v be the solutions to 3x^2 + 5x + 7 = 0. Find u/v+v/u

Hitman42 [59]

Answer: $\dfrac{-17}{21}$

Step-by-step explanation:

Given: u and v be are the solutions of $3x^2+5x+7=0$

Let $ax^2+bx+c=0$ is the quadratic equation and u and v are the zeroes/solutions then

Sum of zeroes; $u+v = \dfrac{-b}{a}$

Product of zeroes; $uv= \dfrac{c}{a}$

Comparing $3x^2+5x+7=0$ to $ax^2+bx+c=0$

we get a= 3 , b= 5 and c = 7

$u+v = \dfrac{-b}{a} = \dfrac{-5}{3}----(i)$

$uv= \dfrac{c}{a} = \dfrac{7}{3}----(ii)$

Now we have to find

$\dfrac{u}{v} +\dfrac{v}{u} =\dfrac{u^2+v^2}{uv}$ adding and subtracting 2uv in numerator we get

$= \dfrac{u^2+v^2+2uv-2uv}{uv}= \dfrac{(u+v)^2-2uv}{uv}$

Substituting the values from (i) and (ii) we get

$\dfrac{(\dfrac{-5}{3} )^2-2\times \dfrac{7}{3} }{\dfrac{7}{3} } = \dfrac{\dfrac{25}{9} -\dfrac{14}{3} }{\dfrac{7}{3} }= \dfrac{\dfrac{25-42}{9} }{\dfrac{7}{3}} =\dfrac{-17}{9} \times \dfrac{3}{7} = \dfrac{-17}{21}$

Hence, the value of $\dfrac{u}{v} +\dfrac{v}{u}$ is $\dfrac{-17}{21}$

5 0

2 years ago

which of the following plotted points on the graph represent the zeros of the function g(x) = (x^2 - 3x - 10)(x + 4)

Natalka [10]

Answer: The answer would be (-2,0),(-4,0), and (5,0)

Step-by-step explanation:

Guessing the answer choices are

(-2,0)

(4,0)

(0,10)

(-4,0)

(0,-2)

(0,-10)

(5,0)

3 0

1 year ago

A. Write the given equation in standard form.8x+3y+6=0

Vikki [24]

Answer:

8x+3y=-6

Step-by-step explanation:

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2 years ago

What operation does the bar between the numerator and denominator of a fraction represent?

atroni [7]

The bar between the numerator and denominator of a fraction represent division.

6 0

2 years ago

Pleas help hellllllllllllllllllp meeeeeeeeeeeeeeee I will mark you brainlist

elena55 [62]

Answer:

500 square units

Step-by-step explanation:

I am pretty sure I am correct

3 0

2 years ago