I do not understand this, can someone help me?

Mathematics

2 answers:

viva [34]3 years ago

8 0

The answer would be 15000, be cause it is more than half a thousand so it would round up a thousand making it 15 thousand.<span />

const2013 [10]3 years ago

8 0

15,000 cause it rounds to the nearest 1000 and 584 rounds to 600 so most likely it will be rounded to 15000

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The product of a+3 and -2a^2+15a+6 is -2a^3+xa^2+51a+18. What is the value of x? Is it 8 ,9,12 or15?

Serggg [28]

Answer:

x = 9 ⇒ second answer

Step-by-step explanation:

∵ (a + 3)(-2a² + 15a + 6) =

-2a³ + 15a² + 6a - 6a² + 45a + 18 =

-2a³ + 9a² + 51a + 18

∵ (a + 3)(-2a² + 15a + 6) = -2a³ + xa² + 51a + 18

∴ -2a³ + 9a² + 51a + 18 = -2a³ + xa² + 51a + 18

∴ x = 9

3 0

3 years ago

40 points and brainliest answer to the first correct answer:

lilavasa [31]

<span>40.19 + 2.06x

I think its the right one, not sure though

Hope this helped</span>

6 0

4 years ago

Read 2 more answers

An isosceles trapezoid ABCD with height 2 units has all its vertices on the parabola y=a(x+1)(x−5). What is the value of a, if p

horrorfan [7]

Answer:

a = -0.3575

Step-by-step explanation:

The points A and D lie on the x-axis, this means that they are the x-intercepts of the parabola, and therefore we can find their location.

The points A and B are located where

$y=a(x+1)(x-5)=0$

This gives

$x=-1$

$y=5$

Now given the coordinates of A, we are in position to find the coordinates of the point B. Point B must have y coordinate of y=2 (because the base of the trapezoid is at y=0), and the x coordinate of B, looking at the figure, must be x coordinate of A plus horizontal distance between A and B, i.e

$B_x=A_x+\frac{2}{tan(60)} =-1+\frac{2\sqrt{3} }{3}$