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3 years ago

What is the discriminant of the quadratic equation -x^2-x-8=0?

Mathematics

1 answer:

Nat2105 [25]3 years ago

8 0

Answer:

-31

Step-by-step explanation:

See Image Below

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Hi, hiw do we do this question?

Nina [5.8K]

$\displaystyle \int\sec x\:dx = \ln |\sec x + \tan x| + C$

Step-by-step explanation:

$\displaystyle \int\sec x\:dx=\int\sec x\left(\frac{\sec x+ \tan x}{\sec x + \tan x}\right)dx$

$\displaystyle = \int \left(\dfrac{\sec x\tan x + \sec^2x}{\sec x + \tan x} \right)dx$

Let $u = \sec x + \tan x$

$\:\:\:\:\:\:du = (\sec x\tan x + \sec^2x)dx$

where

$d(\sec x) = \sec x\tan x\:dx$

$d(\tan x) = \sec^2x\:dx$

$\displaystyle \Rightarrow \int \left(\frac{\sec x\tan x + \sec^2x}{\sec x + \tan x}\right)\:dx = \int \dfrac{du}{u}$

$= \ln |u| + C = \ln |\sec x + \tan x| + C$

4 0

3 years ago

A teacher surveys a sample of students from Lake Middle School. He asks the students where they’d like to go for a field trip. H

Ira Lisetskai [31]

Answer:

210 students

Step-by-step explanation:

80 students chose the aquarium.

60 students chose the science center.

30 students chose the planetarium.

40 students chose the farm.

The students can't vote for more than one place, so you just add all the numbers together.

80 + 60 + 30 + 40 = 210 students

5 0

3 years ago

Read 2 more answers

NEED HELP ASAP!!! 50 POINTS!!! WILL MARK BRAINLIEST

xxTIMURxx [149]

Answer:

x=29. Angle C= 93

Step-by-step explanation:

3(x+2)= 3x+6.

3x+6+52+35= 3x+93.

180-93=87.

87/3= 29. So that means x=29.

for proof you can do 3(29)+93 and you'll get 180.

For angle C; 3(29+2)= 3x31. 31x3= 93.

Angle C= 93 degrees.

8 0

3 years ago

Is the U.S. ever on sale to canadians?

Goshia [24]

Answer:

No because Us is powerful country canada is also powerful but U S ever sale to candians

7 0

2 years ago

Draw and label the final image of △ABC after the given sequence of transformations. Reflect △ABC over the y−axis and then transl

arlik [135]

Answer: The correct option is A.

Explanation:

From the given figure it is noticed that each box in the graph represents the length of 2 units. The coordinates of point A,B and C are (-1,1),(-3,3) and (-2,4) respectively.

If a point reflects over the y-axis then,

$(x,y)\rightarrow(-x,y)$

So after reflecting coordinates of point C become,

$(-2,4)\rightarrow(2,4)$

If a point translated by (a,b), then

$(x,y)\rightarrow(x+a,y+b)$

So, after reflection over y-axis followed by translation by (2,-2), the coordinate of C are,

$(2,4)\rightarrow(2+2,4-2)\\(2,4)\rightarrow(4,2)$

Similarly the image of point A and B are (3,-1) and (5,1) respectively.

The image of C after reflection over y-axis followed by translation by (2,-2) is (4,2), which is shown in only graph A, Therefore A is the correct option.

8 0

3 years ago