MATHEMATICS HIGH SCHOOL

Given the Function:f(x) = -2e^x find f(x), if x=3
So far what I manage to grasp with this equation is
replacing the "x" with 3 So: f(3)= -2e^(3)
The answer ( using the scientific calculator) gave me -6
I have no Idea what are the other steps to this equation.

Answers

Answer 1
Answer: f(x)=-2e^x
x=3
f(3)=-2e^3
pemdas so exponents first
e^3
e=2.718281828454590
cube that
20.0855

now we have
-2 times 20.0855=-40.1711

answer should be -40.1711
(I see what you did wrong, if -6=-2 times e^3, divide -2, 3=e^3, maybe you just put -2 times 3 by mistake)
Answer 2
Answer: okay e^3 is 20.08553692 x -2 = 4.017107385
maybe you had your calculator on the wrong mode or entered it wrong

Related Questions

Need help with a problem. For some reason I can not seem to get it correct. Thinking my formula is wrong. Here's the problem:Assume that there are approximately 140x10^9 stars in our galaxy.Our galaxy is 50,000 light years from the center to the edge, but just 1,000 light years thick. It's shaped like a thin disk or cylinder. If the stars were distributed equally throughout the galaxy, how many stars would you expect to find in one cubic light year?I thought it would be Pi*r^2*l. Then divide that by the number of stars. What am I doing wrong? Thanks, been 20 years since I had to do math like this!
which are the perfect square numbers from the given list: 1,2,3,4,5,6,7,8,9,10,12,14,15,16,18,20,21,24
What do you call a fake chart
GUYS, PLEASE HELP!!! THIS IS REALLY NEEDED! (20 POINTS!)The area of a square is (16x2 − 8x + 1) square units. Determine the length of each side of the square by factoring the area expression completely. Show your work.
What is an expression which combines numbers and operations?

Explain why the initial value of any function of the form f(x) = a(bx) is equal to a.

Answers

So the said problem asking to explain or justify why the initial value of any function of the form f(x) = a(bx) is equal to a. For me I won't agree with the said question, the said function is determine through the value of X because it is the undefined value in the equation that is needed to be define. I hope this would help 

What is x+4/5=2/3- x-3/6

Answers

x+(4)/(5)=(2)/(3)-x-(\not3^1)/(\not6_2)\n\nx+(4)/(5)=(2)/(3)-x-(1)/(2)\n\nfind\ LCD((4)/(5);\ (2)/(3);\ (1)/(2))=2*3*5=30\n\nmultiply\ both\ sides\ by\ LCD=30\n\n30x+30\cdot(4)/(5)=30\cdot(2)/(3)-30x-30\cdot(1)/(2)\n\n30x+6\cdot4=10\cdot2-30x-15\cdot1\n\n30x+24=20-30x-15

30x+24=5-30x\ \ \ \ |subtract\ 24\ from\ both\ sides\n\n30x=-19-30x\ \ \ \ \ |add\ 30x\ to\ both\ sides\n\n60x=-19\ \ \ \ \ |divide\ both\ sides\ by\ 60\n\n\boxed{x=-(19)/(60)}



(x+4)/(5)=(2)/(3)-(x-3)/(6)\n\n(x+4)/(5)=(2\cdot2)/(3\cdot2)-(x-3)/(6)\n\n(x+4)/(5)=(4)/(6)-(x-3)/(6)\n\n(x+4)/(5)=(4-(x-3))/(6)\n\n(x+4)/(5)=(4-x+3)/(6)\n\n(x+4)/(5)=(7-x)/(6)\ \ \ \ |cross\ multiply

6(x+4)=5(7-x)\n\n6(x)+6(4)=5(7)-5(x)\n\n6x+24=35-5x\ \ \ \ \ |subtract\ 24\ from\ both\ sides\n\n6x=11-5x\ \ \ \ \ |add\ 5x\ to\ both\ sides\n\n11x=11\ \ \ \ \ |divide\ both\ sides\ by\ 11\n\n\boxed{x=1}

Manny's cleaning supply store receives a mixture of 80% detergent and 20% water in 15-gallon buckets. Manny would like a mixture of 60 detergent and 40% water in a 5 gallon buckets. To make this he combined some 80/20 mixture with some pure water in each 5 gallon bucket. How much gallons of pure water does Manny add to each 5 gallon bucket.

Answers

Answer:

1.67 gallons

Step-by-step explanation:

Given that:

Original mixture contains 80% detergent and 20% water in a 15 gallon bucket.

New Mixture to contain 60% detergent and 40% water of 5 gallon bucket.

To find:

Volume of Pure water to be added to each 5 gallon bucket to obtain the new mixture.

Solution:

First of all, let us calculate the answer by adding pure water to 15 gallon bucket.

Let the number of gallon of water to be added = x

New volume = (15+x) gallons

Now, let us compare the number of gallons of water in the mixture before and after.

15* 20\% + x = (15+x)* 40\%\n\Rightarrow (3+x)* 5 = (15+x)* 2\n\Rightarrow 15+5x=30+2x\n\Rightarrow 3x=15\n\Rightarrow x =5\ gallons

Therefore, to a 15 gallon bucket (80% detergent and 20% water)of detergent mixture, if we add 5 gallons of pure water , it will become 60% detergent and 40% water.

To a 5 gallon bucket, the number of gallons of water to be added = (5)/(3) =\bold{1.67\ gallons}

Simplify: a^2b^2c^2(2ab+3ac+2bc)

Answers

We can do this like so:

a^{ 2b^{ 2c^(2) } } = a^(8bc)

 a^(8bc) * 2ab = 2ba^(16bc)
a^(8bc) * 3ac =  2ca^(16bc)
a^(8bc) * 2bc =  2bca^(8bc)

The perimeter of a rectangle is 60 centimeters. The base is 2 times the height. What are the dimensions of the rectangle?

Answers

licenciado en Letrase (base 20 y altura 10 cm. 

20=8+v i dont know how to do this

Answers

20 = 8 + v equals v = 12.

First,  subtract 8 from both sides. Your problem should look like: 20 - 8 = v
Second,  simplify 20 - 8 to get 12. Your problem should look like: 12 = v.
Third, switch sides to get v = 12, which is the correct answer.
You subtract 8 from both sides so the answer is v=12
Other Questions
5 + 3 + 52 × 5 − 2 =
You have no more than $65 to spend after paying your bills. You want a drink that costs$2.25 including tax, and you want to buy a pair of shoes, which will have 7% sales tax.What is the inequality that represents the amount of money you have to spend?a. x + 0.07x + 2.25 > 65b. x + 0.07x + 2.25 ≤ 65c. x + 0.07x + 2.25 < 65d. x + 0.07x + 2.25 ≥ 65
An article retails for $37.50. The city sales tax is 6%, and the federal excise tax is 8%. How much does the article cost altogether?
What is the value of f(2)A) -1B) -0.75C) 3D) 12