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simplify:   1.  √-25√-9   2.  (6i)^2   3.  1/i   4.  -√3(√-3)   5.  1/2 - i   thanks

# Proving Other Trigonometric Identities

Prove that:   1 + cos x =     sin x        sin x        1 - cos x

# How to solve this math equation 1 3/5 × 2 1/3=

Need help solving this problem

# what line passes through point (-2,3) (1,-6) ?

you must put it in standard form

# if a line is graphed at points -2,0 -4,0 and -3,2. then what is the eqaution used to solve it?

if a line on a graph is located at points -2'0 -4'0 and -3,2. then what eqaution would i use to sove the problem?

# Let A = {15, 25, 35, 45, 55, 65} and B = {25, 45, 65}. What is A n B

need help trying to figure out this problem no idea how to do it

# Find the future value of the given annuity. (Round your answer to the nearest cent.) annuity due, \$160 monthly payment, 7 1/4% interest for 13 years

I have tried using the formula given and I can't figure it out.

# Any hiked 160 miles in 3 days at this rate how far could she hike in 36 days

Amy hiked 160 Miles in 3 days at this rate how far could she hike in 36 days?

# An infectious strain of bacteria increases in number at a relative growth rate of 200% per hour. When a certain critical number of bacteria are present in the b

can some one walk me through the steps to solve this problem and explain?

F =[1,0,-2,3]

# In a standard deck of 52 cards, what is the probability of drawing one card that is not a club and not a face card?

Probability: unions and intersections

# if one sweater and four shirts cost \$53, while five sweaters and two shirts cost \$103.

find the price of one sweater and the price of one shirt?

# I,m taking a college algebra course in college and I don't know how to solve by factoring.

This is the problem 12x2 + 14x=0

# when object is in motion

Rotation of earth is motion or revolution is motion !what is definition of motion?

# Take 17 from K.

its a multiple choice a is k-17 or b 17-k

# Is the Poisson dis. used to determine the prob. that the next 2 students will arrive 30 min apart at a rate of 30 per hour?

Or is it an exponential distribution problem?

# let an be the sum of the squares of first n natural numbers. that is an = +...+ n^2 for n> or equal to 1.

A). Find the values a1,a2,a3,a4,a5,a6, and a7.   B). Based on the computational results in a), deduce a formula for an

# the question is in the description part.

Question: suppose that a password for a computer system must have at least 8, but no more than 12, characters, where each character in the password is a lowercase english letter, a digit, or one of...

# how many dimes and quarters do i have if i have 5 more quarters than dimes totalling 5.10. how do i turn 5.10=.10x+.25(x+5) into a system of equation

how to make a system of equations out of the word problem that would give me the points to graph and the systems to solve by process of elimination, substitution and graphing it. the word problem...

# If P(x)=x^2, use factoring to simplify P(a+h)-P(a)

Does the first part have anything to do with the second?