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EleoNora [17]
2 years ago
7

Determine which quadratic equation has two non-real solutions.

Mathematics
1 answer:
LekaFEV [45]2 years ago
3 0

Answer:

Hello,

answer C : -3x²-3x-2=0 (or 3x²+3x+2=0)

Step-by-step explanation:

A: delta=12²-4*2*18=0 not negative

B: delta= 5²+4*3*1=37 not negative

C: 3x²+2x+2=0, delta=2²-4*3*2=16-24=-8 is negative: roots are complex

D: delta 16²-4*2*2=240 not negative

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A store marked up the cost of a $40 pair of
choli [55]

Answer:

$39.10

Step-by-step explanation:

$40 * 1.15 = $46

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7 0
3 years ago
The sides of a Triangle are in the ratio 11 19:24 and
Paul [167]

Answer:  The area of the triangle with the perimeter of 540 cm is approximately 10200 cm²

More exactly: 10182 cm²

Step-by-step explanation:  A=\frac{bh}{2}

240 × 84.85  = 10182

To get the height of the triangle, it takes some trigonometry;

Given 3 sides of a triangle, it is possible to calculate the angles using the Law of cosines and the formula cos A =\frac{b^{2} +c^{2} -a^{2} }{2bc}

We will need the measure of angle A, then use the sine of A to get the height of the line from angle C perpendicular to the base, side b.

We can use the dimensions given in the proportions and then multiply by 10 because the sides given add to a perimeter of 54, one tenth of the 540 cm of the actual triangle. The angles of the similar triangles are congruent.

side a = 19, side b = 24, side c = 11

24² + 11² - 19²   is   576 + 121 - 361 = 336

2(24)(11) = 528

cos A = 336 / 528  that is  0.636364\cos^{-1}\left(.6363634\right)= 50.47°

sin(50.47) = 0.77129

0.77129 × 11 = 8.48 is the height  Rounding to 8.5 would be reasonable for this height

Using rounded values here to calculate Area :

85 × 240/2 = 10200 cm²

8 0
2 years ago
Simplify, and list any restrictions on the variable: (2x(x-4)/(4x^2-64)
uysha [10]

Answer:

WHEN SIMPLIFIED THE ANSWER WILL BE:

Step-by-step explanation:

(X)/(2(X+4)

8 0
3 years ago
Hello This is pretty Easy But i forgot the basics
DIA [1.3K]

Answer:

-3, -2 1/2, -2 2/5, -2 3/10, -2

Step-by-step explanation:

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3 years ago
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Answer

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Step-by-step explanation:

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3 years ago
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