If -nx2 + tx + c = 0, what is x equal to?

Answers

Answer 1

Answer: $f(x)=-nx^2+tx+c=0\n\n \Delta=t^2-4\cdot(-n)\cdot c=t^2+4cn\n\n 1.\n \Delta<0 \Rightarrow x\in\emptyset\n\n 2.\n \Delta=0\n x=(-t)/(2\cdot(-n))=(t)/(2n)\n\n 3.\n \Delta>0\n √(\Delta)=√(t^2+4cn)\n x_1=(-t-√(t^2+4cn))/(2\cdot(-n))=(t+√(t^2+4cn))/(2n)\n x_2=(-t+√(t^2+4cn))/(2\cdot(-n))=(t-√(t^2+4cn))/(2n)\n$

Related Questions

You have two boxes of colored pens. The first box contains a red pen, a blue pen, and a green pen. The second box contains a yellow pen, a red pen, and a black pen. What is the set that represents all the pens? a.{red pen, blue pen, green pen}
b.{red pen}
c.{red pen, red pen, green pen, yellow pen, black pen}
d.{red pen, blue pen, green pen, yellow pen, black pen}

Answers

Thank you for posting your question here. If you have a two boxes of colored pens. The first box contains a red pen, a blue pen, and a green pen. The second box contains a yellow pen, a red pen, and a red pen, blue pen, green pen, yellow pen, black pen. The answer is D. I hope it helps.

Answer:

d. {red pen, blue pen, green pen, yellow pen, black pen}

Step-by-step explanation:

A = Colors of pens in the first box

B = Colors of pens in the second box

A = {red, blue, green}

B = {yellow, red, black}

D =? set that represents all the pens

In set theory, the union of two (or more) sets is an operation that results in another set, whose elements are the same as the initial sets, without repeating those that are the same.

Therefore, the set that represents all the pens is:

D = {red, blue, green, yellow, black}

Hope this helps!

5(7 − 4)2 ÷ 3 + 11 (the 2 is an exponent btw)

Answers

P.E.M.D.A.S
First subtract 4 from the 7 to give you 3.
3 with an exponent of 2 would equal 9. 5 times 9 equals 45 divided by three equals 15 plus 11 equals...

The answer: 26

If RS = 12 and ST = 7, find RT. U

Answers

Answer:

Answer is 19

Step-by-step explanation:

Add 12 and 7 and you will get the Answer 19.

Hope this helps.

A school custodian waxed the gymnasium floor that measured 20 feet by 20 feet. How many square feet did she have to wax?

Answers

Hey there, all you do is multiply 20 by 20, 20×20=400. Therefore, the answer is 400 square feet.

5(t+3)+2(3t+4)-(5t-3)

Answers

5(t+3)+2(3t+4)-(5t-3)
First, you need to use the distributive property.
5t+15+6t+4-5t+3
Next, you add/subtract like terms
5t+6t-5t=6t
15+4+3=22
So, you are left with:
6t+22

Hope this helped! If you have any other questions pertaining to this, please ask!

The answer is 6t + 26 In the process of solving this problem you will use mathematical properties , adding , subtracting , dividing , and simplifying.

My reason being is because , 1st you solve | 2 *3t + 13 , than look at the equation again :

it's really , (5*3t) + 2 *( (3t+4) ) - ( 5t - 3 ) . This is how I got my answer , by pulling out like terms , which happen to be : 6t + 26 = 2 * (3t+13).

The last step to the answer is below :

2 * (3t + 13) .

I really hope that this helps you out a lot, have a nice day :)

Find the inverse of h(x) = (2x + 6)/5

Answers

Answer:

h^-1(x) = (5x - 6)/2

Step-by-step explanation:

To find the inverse of h(x) = (2x + 6)/5, we need to solve for 'x':

y = (2x + 6)/5 ⇒ 5y = 2x + 6 ⇒ 5y - 6 = 2x ⇒ x = (5y - 6)/2

Therefore, h^-1(x) = (5x - 6)/2

Answer:

(5x-6)/2

Step-by-step explanation:

h(x) = (2x + 6)/5

y = (2x + 6)/5

To find the inverse, exchange x and y

x = (2y+6) /5

Then solve for y

Multiply each side by 5

5x = (2y+6)/5*5

5x = 2y+6

Subtract 6 from each side

5x-6 = 2y+6-6

5x-6 = 2y

Divide by 2

(5x-6)/2 = 2y/2

The inverse is

(5x-6)/2

Other Questions

There are 46 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 5 min and a standard deviation of 4 min. (Round your answers to four decimal places.)(a) If grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 P.M. TV news begins?(b) If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading is done before turning on the TV?

If you come to work at 7:00 and stay 'till 4:15 with a 30 minute lunch - in decimal notation - how many hours did you work?

6 hundred thousands + 38 hundreds

Is 2+2 an equation or an expression and why?