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3 years ago

12

Question is attached, please explain a little:) will mark BRAINLIEST

1 answer:

Alexus [3.1K]3 years ago

5 0

Answer:

D

Step-by-step explanation:

We know it has 2 distinct zeros. This means the discriminant of the quadratic is positive and must have 2 real zeros that can be rational or irrational. We also know the quadratic has rational coefficients which means both are either rational or irrational. They can not be one of either. Since it tells us one is rational, the other must be too.

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9= 2/3 (x+12) plz help

avanturin [10]

Answer: x=3/2

Step-by-step explanation:

Multiply the parentheses by 2/3. 9=2/3x+8.

Multiply both sides by 3 . 27=2x+24

Move the term. When moved to the left side it changes from positive to a negative. -2x=24-27.

-2x=-3

Divide both sides by -2

x=3/2 (x=1 1/2, x=1.5)

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3 years ago

Which is the rationalized form of the expression. A, B , C, or D?

grin007 [14]

Answer:

C

Step-by-step explanation:

Multiply the top and bottom, both by sqrtx-sqrt5. This is in order to rationalize the denominators.

You get answer C.

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2 years ago

I need helpppp!!<br> Find the volume of the sphere. Round to the nearest tenth.<br> d = 9

weqwewe [10]

Answer: 381.7

Step by step explanation:

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2 years ago

Hi. Please I need help with these questions.

ElenaW [278]

Answer:

Q 12 roots of the equation

$2x^{2} -6+1=0 \\= (x-\frac{\sqrt{10} }{2})(x+\frac{\sqrt{10} }{2})\\$

∝ = $\frac{\sqrt{10} }{2}$

β = $-\frac{\sqrt{10} }{2}$

no matter if u oppose the root

(i) 2( $\frac{\sqrt{10} }{2}$ ) $(-\frac{\sqrt{10} }{2} )^{2}$ +2 $(\frac{\sqrt{10} }{2} )^{2}$ ( $-\frac{\sqrt{10} }{2}$ )+2(

(ii)( $(\frac{\sqrt{10} }{2})^{2}$ - 3 ( $\frac{\sqrt{10} }{2}$ )( $-\frac{\sqrt{10} }{2}$ ) + ( $(-\frac{\sqrt{10} }{2})^{2}$ ) = $\frac{25}{2}$

Q 13 roots of equation

$4x^{2} -3x-4=0\\\alpha = -0.693\\\beta = 1.443$

the roots of the second equation are

x1 = 1/3(-0.693) = -0.231

x2 = 1/3(1.443) = 0.481

the equation is

(x+0.231)(x-0.481)=0

$x^{2}-\frac{1}{4} x-\frac{1}{9}$

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3 years ago

Why is 1 3 + 1 3 NOT equal to 2 6 ?

katrin [286]

It is a trick question 13+13 DOES equal 26

8 0

3 years ago