Mathematics - 8 July 2007

what is the equation or a parabola with vertex (0,0) and focus of (0,4)?

2007-07-08 12:18:05 · 3 answers · asked by Sara 3

If Marsha has $100 to invest at 10% per annum compounded monthly, how long will it be before she has $175? If the compounding is continuously, quarterly and daily, how long will it be?

2007-07-08 12:00:05 · 4 answers · asked by journey 1

This is dealing with Parametric Curves.

You are given the following:

x = ln(t) y = sqrt(t) t >= 1

Eliminate the parameter to find a Cartesian equation of the curve.

I was thinking that you solve for t in the x equation and then plug it into the y equation.

But if thats right, how do you do that? E both sides?

2007-07-08 11:44:45 · 4 answers · asked by Anonymous

2007-07-08 11:40:04 · 5 answers · asked by ? 1

possible solutions....



a. 1

b. 2

c. 3

d. 4

e. 5

f. 6

or is it none of these?

2007-07-08 11:35:18 · 2 answers · asked by chris 2

2007-07-08 11:16:01 · 5 answers · asked by jamielinell 1

if x and y are positive integers such that x^2+y^2=41, then what is the value of (x+y)^2?

2007-07-08 11:15:41 · 3 answers · asked by gfgfd g 1

Step by step please!

2007-07-08 11:00:32 · 3 answers · asked by zex_suik 2

possible points on the surface.....

a. (2, 1, 3), (2, 1, -5)

b. (-2, 1, 2), (-2, 1, -4)

c. (2, 1, 2), (2, 1, -4)

d. (-2, -1, 5), (-2, -1, -3)

e. (2, -1, 3), (2, -1, -5)

f. (2, -1, 2), (2, -1, -4)

or could it be none of these?

2007-07-08 10:57:54 · 2 answers · asked by Olivia 4

1. Given the complex numbers z1 = 2 − i and z2 = 1 + i.
(a) Find z3 = z1 z2.
(b) Find z4 = z1/z2
.(note zk is z subscript k and rk is r subscript k)
(c) Express each zk in polar form zk = rk (cos θk + i sin θk)
; − π< θk ≤ π for k = 1, 2, 3 and 4.
(d) (i) Show r3 = r1 r2.
(ii) Show r4 = r1/r2
.
(iii) Show θ3 = θ1 + θ2.
(iv) Show θ4 = θ1 − θ2.
(e) Plot the complex numbers zk for k = 1, 2, 3 and 4 in the complex plane.

2007-07-08 10:54:32 · 3 answers · asked by Anonymous

if attendance to a certain high school had increased by 30 percent over last year, this year`s attendance would have been 1,430. in reality, attendance fell by 35 percent from last year. what was this year`s attendance?

2007-07-08 10:53:40 · 3 answers · asked by gfgfd g 1

possible solutions.....


a. (14^-1/2 )(i + 2 j + 3 k)

b. (53^-1/2 )(4 i + j + 6 k)

c. (14^-1/2 )(i + 3 j + 2 k)

d. (11^-1/2 )(3 i + j + k)

e. (41^-1/2 )(4 i + 4 j + 3 k)

f. (34^-1/2 )(3 i + 4 j + 3 k)

or is it none of these?

2007-07-08 10:52:02 · 2 answers · asked by Doug 2

write an equation of the circle with center (-2,-3) and radius 8

2007-07-08 10:42:17 · 4 answers · asked by Anonymous

i need an explaination on how to factor this

(x+1)^3/2 + x * 3/2(x+1)^1/2

2007-07-08 10:41:59 · 3 answers · asked by dreamerchacho 2

I know their is some sort of short cut equation, but I can't remember it.

2007-07-08 10:29:48 · 9 answers · asked by Anonymous

...in 12 hrs

2007-07-08 10:25:07 · 4 answers · asked by Book of Changes 3

there are 4 circles of horses on the merry go round. Each circle is 3 feet from the next circle. The radius of the inner circle is 6 ft.
If a horse in the inner circle is 5/6 of the way around the merry go round, give its polar coordinates

2007-07-08 10:08:01 · 2 answers · asked by jessie0420 2

Am I correct? And if not, why?
A) Rectangle: 4 cm and 7 cm. The answer I got was (4) (7)= 28 cm squared.
B) Parallelogram tilted to the left side. 8 m is the top base with 3m dotted line going straight down on the inside of the parallelogram. The answer I got was (8) (3) = 24 m squared.
C) Right Triangle: 10 ft. with base of 14 ft. This one I'm not sure about but this is my answer:
10 ft. squared + 14 ft. squared = ? squared.
100 + 196 = 296 ft. squared
Squared root symbol/ 296 [two squiggly lines on top each other] 17.2.5.
If any of these are wrong please let me know and how to get the correct answer.

2007-07-08 10:03:34 · 7 answers · asked by Anonymous

you drop one penny per hour.The plane is travelling at 720 mph. How long does it take you to drop all 100 pennies. Assume plane refuels at speed in mid-air and you do not pick up the pennies as they drop, and also you you start dropping pennies as soon as the plane reaches speed.

2007-07-08 09:50:13 · 4 answers · asked by Book of Changes 3

I can't figure how to add the drawing to this so I will just give the dimensions and hope someone can help.
Point A is farthest from the circle. A straight line going to the circle is Point D. From Point A to D is 18. Point C goes diagonally up towards the circle. Point A to C is 24. Inside the circle is Point B with dotted line (r) going to D and a dotted line(r) going to C. Inside the circle by Point C is the square box denoting a right angle. If anyone can understand what I've described I would appreciate your input.

2007-07-08 09:49:20 · 4 answers · asked by Anonymous

What is the length of the side of a square inscribed in a circle of radius 1?
Also, what is the lenth of the side of a cube inscribed in a sphere of radius 1?

2007-07-08 09:43:40 · 7 answers · asked by Anonymous

16y^2 = 25

2007-07-08 09:31:45 · 5 answers · asked by Anonymous

The question came across my head one day and I tried to solve it myself but failed. I knew there was some simple proofs when I was in school but forget now. Help me to pick up my mathematics.

2007-07-08 09:20:44 · 4 answers · asked by Anonymous

solve the equation x^3 + sx^2 + x + 2 = 0, if -2 is a root


No answers like "i dont know" please

2007-07-08 09:17:19 · 5 answers · asked by °†¿ÐámñéÐ?†° 2

Use synthetic division to find the calue of f(-2) for f(x) = x^3 - 3x^2 - x - 9

2007-07-08 09:16:09 · 1 answers · asked by °†¿ÐámñéÐ?†° 2

If y varies directly as x and inversely as z^2, and y = 3 when x = 2 and z = 4, what is the calue of x when y = 9 and z = 4?

2007-07-08 09:14:29 · 2 answers · asked by °†¿ÐámñéÐ?†° 2

please no answeres like, i dont know.

2007-07-08 09:10:50 · 5 answers · asked by °†¿ÐámñéÐ?†° 2

THE EQUATION HAS TO BE IN THE FORMAT OF
ax2+bx+c=0

THE REAL-LIFE SCENARIO CAN BE ANYTHING... AS LONG AS IT HELPS ME GET THE RESULTS WITH THAT FORM OF EQUATION!!

HELPPP =[[[

2007-07-08 09:01:27 · 3 answers · asked by Confused Girl 1

possible answers:
(x+2)=(y-3)^2
2(x-2)=(y-3)^2
2(x+2)=(y-3)^2

2007-07-08 08:44:36 · 4 answers · asked by D D 1

possible answers:
(-4,0)
(-4,4)
(0,4)
(4,4)

2007-07-08 08:41:54 · 2 answers · asked by D D 1