All categories

2 years ago

If 18 is subtracted from twice the square of an integer, the

Mathematics

1 answer:

Sergeu [11.5K]2 years ago

5 0

Answer:

-3/2

Step-by-step explanation:

Let x = the integer:

2x^2 - 18 = 9x

2x^2 - 9x - 18 = 0

Now either factor that or use the quadratic formula if you're lazy like me.

x = -3/2 and 6, so x must be 6 because it has to be an integer.

You might be interested in

Write an equation that represents the line.<br> Use exact numbers.

jolli1 [7]

Answer:

1x-2y

Step-by-step explanation:

You have to go down 2 on the y-axis and over to the right 1 on the x axis

3 0

3 years ago

Using the trend line y = 8x + 8, for the data shown, complete the residual table.

Anit [1.1K]

Answer:

-1,0,2,-2,0 in that order

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Use the quadratic formula to solve x² + 9x + 10 = 0.<br><br> What are the solutions to the equation?

jok3333 [9.3K]

Answer:

$-1.30\ and\ -7.70$ (2 decimal places)

Step-by-step explanation:

Quadratic Formula: $x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

-----------------------------------------------

$x^2+9x+10=0$

Plug in values:

$x=\frac{-9\pm \sqrt{9^2-4\cdot \:1\cdot \:10}}{2\cdot \:1}$

First value of x:

$x=\frac{-9+\sqrt{41}}{2}=-1.30$ (2 decimal places)

Second value of x:

$x=\frac{-9-\sqrt{41}}{2}=-7.70$ (2 decimal places)

6 0

2 years ago

Find the value of each of the following: exponents

Nataly [62]

Answer:

7) is 625

8) 169

9) 1.44

10) 180??

11) 1000000

12) 3430

hopefully these are right

Step-by-step explanation:

7 0

2 years ago

What is an equation of the line that passes through the points (1, 6)<br> and (1, 2)?

victus00 [196]

Answer:y = -5x + 11

Step-by-step explanation:

First, find the slope (m) of the line that passes through these points:

m = (1-6) / (2-1) = -5/1 = -5

Then use the point slope formula to find the equation of the line:

m = (y-y0)/(x-x0)

-5 = (y-1)/(x-2)

-5(x-2) = y-1

y - 1 = -5x+10

y = -5x + 11

8 0

2 years ago