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3 years ago

Factor completely 3x^2+ 2x -1.

Mathematics

1 answer:

katrin [286]3 years ago

7 0

Answer:

option C

Step-by-step explanation:

$3x^2+2x-1\\\\=(3x+a)(x+b)\\\\(3b+a)=2\\\\ab=-1$

and here we think of b=1 and a=-1

so we have

$(3x-1)(x+1)$

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A forestal station receives the locations of two fires, one of them in a forest located 11 Km heading N69°W from the station. Th

loris [4]

Answer:

30.7 km

Step-by-step explanation:

The distance between the two fires can be found using the Law of Cosines. For ΔABC in which sides 'a' and 'b' are given, along with angle C, the third side is ...

c = √(a² +b² -2ab·cos(C))

The angle measured between the two fires is ...

180° -(69° -35°) = 146°

and the distance is ...

c = √(11² +21² -2(11)(21)cos(146°)) ≈ √945.015

c ≈ 30.74

The straight-line distance between the two fires is about 30.7 km.

8 0

3 years ago

What is 8y + 4x + 6y

AlexFokin [52]

Answer:

588 + 14y

Step-by-step explanation:

8y + 6y = 14y

14y + 4x = 588

Then add (I think)

8 0

3 years ago

Example 1: Simplify the expression,<br> 127 - 2(3+4)

astra-53 [7]

Answer:

113

Step-by-step explanation:

127 - 2(3+4)

127 - 2(7)

127-14

113

5 0

3 years ago

What is 16 divided by X^2 equals 8 divided by X + 6?

zaharov [31]

Solve: $\frac{16}{x^{2}} = \frac{8}{x + 6}$

$\frac{16}{x^{2}} = \frac{8}{x + 6}$

$\text{Cross multiply: } 16(x + 6) = 8x^{2}$
$\text{Simplify: } 2(x + 6) = x^{2}$
$\text{Expand: } 2x + 12 = x^{2}$

$\text{Solve for x: } x^{2} - 2x - 12 = 0$

$\text{Use the quadratic equation: } x = \frac{-b \pm \sqrt{b^{2} - 4ac}}{2a}$
$x = \frac{2 \pm \sqrt{4 + 48}}{2}$
$x = \frac{2 \pm \sqrt{52}}{2}$
$x = \frac{2 \pm \sqrt{13 \cdot 4}}{2}$

$x = \frac{2 \pm 2\sqrt{13}}{2}$
$\therefore x = 1 \pm \sqrt{13}$

7 0

3 years ago

Ryan played in 3 basketball games. He scored 18 points in the first game and 12 points in the second game. If he scored 42 point

stealth61 [152]

The correct answer for this very hard equation would happen to be 12 because 18+12 happens to equal 30 and 42-30 just so happens to equal 12

7 0

3 years ago

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