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The differential eqn for y'' = -y HELP PLEASE :(

I understand that it is an imaginary number, and the roots are the same. How to i solve?-The roots are not the same, the roots are +i and -i, proceed as usual. y = A e^{it} + B e^{-it}, A and B = con

Find the m arc YZ? Help?!

Here is the picture: http://www.flickr.com/photos/53367954@N0… I really need help with this one, and if you can show step by step it would be really great. Thanks!-Intersecting chords within a circle

Can you check my answers please

1. how do i simplify the expression (-6i)(-6i)? i got 36i, am i right? 2.(2+5i)(-1+5i) i got 23+5i-1.remember that i^2 = -1 so (-6i)(-6i) = 36i^2 = -36 2.(2 + 5i)(-1 + 5i) = -2 + 10i - 5i + 25i^2

What is an interior segment

a cross section?

I need some help with my Calculus Review

A rectangle is inscribed in a circle as shown. The diameter of the circle and the diagonal of the rectangle are both 8 meters. Express the length of the side y (The long side) of the rectangle as a f

How would I compute the probability of randomly selecting a two or club from a deck of 52 cards

there are four 2s, thirteen clubs, and one card in the intersection, thus the number of desirable cards is 4+13-1. divide this by 52 for the answer.-52c2 = 1326 ways for any 2 cards ways for (two) =

If a|k and b|k prove that lcm(a,b)|k.

If a divides k and b divides k prove that the least common multiple of (a,b) divides k.-Let the greatest common divisor of a and b be g.Then a=cg and b=dg for some integers c and d.Then if a divides k

I need help on my algebra homework, 2x+4=y word problem

The question is Write a word problem that involves a real-world situation that can be solved using the rule for the function 2x+4=y . Could you come up with a short simple answer ? Please thanks , 1O

If P is the first integer, what are the 4 consecutive integers after it

If P is the first integer, what are the 4 consecutive integers after it ?-P P+1 P+2 P+3 P+4-P, P-(-1), P-(-2), P-(-3), P-(-4).-P+1, P+2, P+3, P=4.-P, P+1, P+2, P+3, P+4

How do you know the ratio of the cars

An auto dealer sells 40 cars, of which some are compacts, others are sedans, and still others are station wagons. Any of the following could be the ratio of compact cars to sedans to station wagons, E

Wondering if I answered this Question correctly

For what values of k will the equation 4x^2+kx+25=0 have real solutions. I used the formula x= -b/2a and got k= 20 or k= -20 Thanks-To have real solutions, the discriminant must be non-negative: b^2

Math help on these questions

1.) If a sports shop sold 1,500 dozen golf balls last week, how many individual golf balls did the shop sell? A. 18,000 B. 180 C. 12,500 D. 125 2.)The Patels took out a 15-year mortgage. How man

Find the curvature of r(t) = <1, t^2, e^t>

I dont know what m doing wrong. Im getting this radical that can probably be simplified, but that would be a hell of a lot of work and I dont think its right in the first place.-I am used to using x-h

Best answers gets points!I need help with these algebra/pre-calc questions!

i need help with my homework! if you know any of these please answer. 1) solve for A if f(x)= -Ax^2+Bx-8, f(-5)= -123 and g(x)=4x+B, g(2)=11 2)Determine the solution set of x^2 3)The height s of a

How would I compute the probability of randomly selecting an ace or heart from a deck of 52 cards

Probability = [number of ways of success] / [total number of possible ways] How many aces ?How many hearts ?any overlap ? P(ace or heart) = (4/52) + (13/52) - (1/52) = 16/52 = 4/13 ¶-a deck of card
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