F(2)=3x^2-6x+2
I need help!!!
Answers
Answer:
2
Step-by-step explanation:
substitute x by the value in the function, here its f(2) so
3(2)^2 - 6(2)+2
= 12 - 14 = 2
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1If x -1/x = 4 then the value of x3+1/x3
Answers
Answer:
From top to bottom, the boxes shown are number 3, 5, 6, 2, 4, 1 when put in ascending order.
Step-by-step explanation:
It is convenient to let a calculator or spreadsheet tell you the magnitude of the sum. For a problem such as this, it is even more convenient to let the calculator give you all the answers at once.
The TI-84 image shows the calculation for a list of vectors being added to 4∠60°. The magnitudes of the sums (rounded to 2 decimal places—enough accuracy to put them in order) are ...
... ║4∠60° + 3∠120°║≈6.08
... ║4∠60° + 4.5∠135°║≈6.75
... ║4∠60° + 4∠45°║≈7.93
... ║4∠60° + 6∠210°║≈3.23
... ║4∠60° + 5∠330°║≈6.40
... ║4∠60° + 7∠240°║≈ 3
_____
In the calculator working, the variable D has the value π/180. It converts degrees to radians so the calculation will work properly. The abs( ) function gives the magnitude of a complex number.
On this calculator, it is convenient to treat vectors as complex numbers. Other calculators can deal with vectors directly
_____
Doing it by hand
Perhaps the most straigtforward way to add vectors is to convert them to a representation in rectangular coordinates. For some magnitude M and angle A, the rectangular coordinates are (M·cos(A), M·sin(A)). For this problem, you would convert each of the vectors in the boxes to rectangular coordinates, and add the rectangular coordinates of vector t.
For example, the first vector would be ...
3∠120° ⇒(3·cos(120°), 3·sin(120°)) ≈ (-1.500, 2.598)
Adding this to 4∠60° ⇒ (4·cos(60°), 4°sin(60°)) ≈ (2.000, 3.464) gives
... 3∠120° + 4∠60° ≈ (0.5, 6.062)
The magnitude of this is given by the Pythagorean theorem:
... M = √(0.5² +6.062²) ≈ 6.08
___
Using the law of cosines
The law of cosines can also be used to find the magnitude of the sum. When using this method, it is often helpful to draw a diagram to help you find the angle between the vectors.
When 3∠120° is added to the end of 4∠60°, the angle between them is 120°. Then the law of cosines tells you the magnitude of the sum is ...
... M² = 4² + 3² -2·4·3·cos(120°) = 25-24·cos(120°) = 37
... M = √37 ≈ 6.08 . . . . as in the other calculations.
Answer:
Going from top to bottom answer is
Z, X, U, Y, V, W
Step-by-step explanation:
I know this is right because I got a 5/5 of the test and I painstakingly solved each problem and my goodness it took a while.
Answers
Answer:
c = 8.25
Step-by-step explanation:
31/4 = 7.75
-1/2 = -.5
7.75 - (-.5) = 8.25
Hopefully this helps you :)
pls mark brainlest ;)
Answers
Answer:
The answer is C) 2
Step-by-step explanation: I hope you get this right also.
Answer:
C
Step-by-step explanation:
Answers
Answer:
The total cost is represented by the dependent variable.
Step-by-step explanation:
If we have a function:
x is the independent variable and y is the dependent one, since y is a function of x.
In this problem:
So the total cost of buying b cans of beans is 0.79b. That is, the total cost depends of the number of cans of beans bought.
So the total cost is represented by the dependent variable.
Which function represents the total number of seats, h(x) = f(x)g(x)?
h(x) = 12x + 108
h(x) = 12x2 + 108x
h(x) = 12x – 108
h(x) = 12x2 + 108
Answers
Answer:
Its B
Step-by-step explanation:
B on edge 2020
Answer:
Its B
Step-by-step explanation:
On Edge 2020
Answers
f:(-4/3)(-3/4 x)=9(-4/3) x=-36/3= -12 x=-12
g(-8/7)(-7/8 x)=(-8/7)(-21/64) Cross simplify and you get 3/8 x=3/8