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galina1969 [7]
2 years ago
9

Evaluate the expression for x=-5 and y=3 1. 4x^2 -xy +5y^2 2. |3x|-6|x+4y|

Mathematics
1 answer:
Charra [1.4K]2 years ago
7 0

Answer:

1. 160

2. 18

Step-by-step explanation:

Replace variables 4(-5)^2-(-5)(3)+5(3)^2

simplify 100+15+45

= 160

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Answer:

<h2>D.</h2>

Step-by-step explanation:

<h2>BEACAUSE ITS FORMED PROPERLY</h2>
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Is point​ K(10,16) or point​ L(12,12) closer to point​ J(6,4)? Explain.
katrin [286]

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4 0
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6 0
3 years ago
Read 2 more answers
Question mark 1: Match the triangle to correct function and answer
postnew [5]

Answer:

Triangle 1 - m\angle A = 58^{\circ}, hypotenuse = 16

x \approx 8.479

Triangle 2 - m \angle A = 44^{\circ}, adjacent leg = 18

x \approx 17.382

Triangle 3 - m\angle A = 49^{\circ}, opposite leg = 12

x \approx 15.900

Step-by-step explanation:

Each triangle is solved by means of trigonometric relations:

Triangle 1 - m\angle A = 58^{\circ}, hypotenuse = 16

\cos 58^{\circ} = \frac{x}{16}

x = 16\cdot \cos 58^{\circ}

x \approx 8.479

Triangle 2 - m \angle A = 44^{\circ}, adjacent leg = 18

\tan 44^{\circ} = \frac{x}{18}

x = 18\cdot \tan 44^{\circ}

x \approx 17.382

Triangle 3 - m\angle A = 49^{\circ}, opposite leg = 12

\sin 49^{\circ} = \frac{12}{x}

x = \frac{12}{\sin 49^{\circ}}

x \approx 15.900

8 0
3 years ago
solve the equation using the Quadratic Formula. Round your solutions to the nearest tenth if necessary.) please help I need expl
Viefleur [7K]

Answer:

Quadratic Formula x = [-b +- Sq root (b^2 - 4ac)] / 2a

In this example a= 2 b= -6 c= 5

x = [- - 6 +- Sq root ((-6^2) - 4 *2*5)] / 2*2

x = [6 +-sq root (36 -40)] / 4

x = 6 +- 2i / 4

x1 = 1.5 + .5i  

x2 = 1.5 -.5i

Step-by-step explanation:

5 0
4 years ago
Read 2 more answers
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