Questions

[papergangsta]

The eccentricity of the figure given by the equation x^2 + 4y^2 -6x -16y = 11 is?
I have no clue on how to find eccentricity.
Answer is sqrt3/2

32 on 2010 District 1 test.

The graph of x^2 + 0xy - y^2 + 0x + 0y +0 = 0 is a ?
Answer: pair of intersecting lines.

The Teechur Stor sells red, blue, green, and black ink pens. They package the pens in sets of 3. How many different sets of 3 can they package?
Answer: 20

The line y = -3x -4 is tangent to the curve y = px^3 +qx at (-1,-1). Find p + q
Answer: 1

Find an equation of the line tangent to the curve y = x^3 - 2x^2 at the point (1,-1)
Answer: y =6x-4

The area in square units of the region bounded by y= -x^2 -4x and y = 0 is:
Answer: 9 1/4

All help is greatly appreciated. Thanks:)

[AuSmith]

[AuSmith]

[AuSmith]

[AuSmith]

[AuSmith]

[AuSmith]

[AuSmith]

And, I don't know how familiar you are with things like calculus, so if you don't understand something, don't be afraid to ask. Even if you just want to say that you didn't get any of it.

[stupidityismygam]

[papergangsta]

I think I understand the questions now. On that one question, it was a typo. Sorry. Thank you so much! I do have trouble with the calculus area since our school doesn't offer it as a class. I do have a few more questions if you would like to help.

If f''(x)= 10 and f'(1)=7 and f(-1)=10 then f(2) =
Ans. 16

A water tank in the shape of a right cylinder is six feet high and has an inside diameter of eight feet. The tank is not full. It contains 1000 gallons of water. To the nearest inch, how deep is the water?
Ans. 2' 8''

How do you find the directrix of a conic?

Find the sum of the series 0.5 - ((0.5)^2)/2 +((0.5)^3)/3 - ((0.5)^4)/4 +((0.5)^5)/5...

The graph of x^2 + y^2 -10x +6y +9=0 is a circle with the center (h,k) and a radius (r) find h+k+r

Thank you.

[AuSmith]

[AuSmith]

[AuSmith]

The directrices of the hyperbola [unparseable or potentially dangerous latex formula] are the vertical lines

[unparseable or potentially dangerous latex formula].

[AuSmith]

[AuSmith]

[papergangsta]

Thanks. I have a few more questions.

Lotta Sense has six coins. A penny, nickel, dime, quarter, half-dollar, and a silver dollar. How many different sets of three coins can she create?
Ans: 20

All of the aces, treys, fives, sevens, and nines have been removed from a standard deck of 52 playing cards. The remaining cards are shuffled. Two cards are dealt face up. What is the probability that the first card is a face card and the second card is a factor of eight (to the nearest %).
Ans: 15%

How many ways can a mother, father, son, and daughter be seated around a circular table with 4 chairs.
Ans: 6

The play ball association is putting 5 balls in each gift box for each kid. The association has golf balls, basketballs, tennis balls, baseballs, dodgeballs, footballs, and ping pong balls. How many different gift boxes of 5 balls can they put together?
I tried the method that you showed me with the four different types of pens and I got 924 but the answer is 462.

Thanks you so much:)

[papergangsta]

Ok. On the Lotta Sense question, would you do 6 C 3?

[AuSmith]