Proving the identity (verify) the trig function

cos (x+y) + cos (x-y) = 2 cos (x) cos (y)   I've tried a lot of modifications to both sides but I just cannot get them to be equal

04/02/16

Whats the product of 6x+2 and X2 & dash;2

Im just fooling around and want to see who knows their algebra math thats all

value of a+b+c?

If the graph of the equation y=ax2+bx+c passes through the points (0,2), (-6,-7), and (8,-14), what's the value of a+b+c?

5x + 3 > 20

linear inequalities

04/02/16

word problem

The tuition at a local community college was ?$2497 in 1994 and? $2798 in 1996. Find the rate at which tuition was increasing.

Help with a binomial distribution problem

You roll a standard die 24 times. Knowing that the event satisfies the requirements for a binomial distribution, find the probability that exactly 4 of the rolls show a 6.

04/01/16

Help, what are some practical examples for multiplying negatives

It seems like a huge swing from positive to negative then back to positive. What are some real world applications for multiplying negatives

04/01/16

Absolute value function, modulus function

|x|+|y| = |x+y| then xy>0 |x|-|y|  =|x-y| then xy < 0   Can you please explain the above absolute value function properties and give some examples on the same 

f(x)=3/x-1 +3

theres a fraction and so you have to fividr it o the other side so it can be by itself 

03/31/16

Equivalent expression for 24x + 16

Idk this answer plz help

03/31/16

Divide: (sqrt(5) + 3) / (sqrt(5) - 3)

A: -17/2+(3/2) sqrt(5) B: -7/2 - (3/2) sqrt(5) C: 7/2 - (3/2) sqrt(5) D: 7/2 + (3/2) sqrt(5) E: 1 - (3/2) sqrt(5)

03/31/16

Identify the center and radius for circle (x-a)^2+(y+b)^2=m

Also, Write an equation for the circle that's diameter has end points (-5,2) and (10,10)

Describe the right­hand and left­hand behavior of the graph of the polynomial function. f(x)=x^5-x^2+2

 Describe the right­hand and left­hand behavior of the graph of the polynomial function. f(x)=x^5-x^2+2

03/31/16

what is the answer to -3x+2y=11

It's to hard for me to solve help plz

03/30/16

You roll two six-sided number cubes. What is the likelihood that they would land on an even number and a 5?

Help with question:   You roll two six-sided number cubes. What is the likelihood that they would land on an even number and a 5?

What is the percent strength of a 25mL/250mL solution?

Dilutions 

03/30/16

Convert a 35% strength (w/w) cream to a fraction

dilutions 

Given that (12,3) is on the graph of f(x), find the corresponding point for the function 8f(x)

I need the correct answer and showing work please!

In an isosceles triangle, one angle is 45 degrees greater than each of the other two equal angles. Find the measure of all three angles.

 In an isosceles triangle, one angle is 45 degrees greater than each of the other two equal angles. Find the measure of all three angles.

Determine n(B)

for the set B =(5), determine n(B)

03/29/16

find cos (2theta) if csc (theta) = -3/2 and tan(theta)is greater than 0

i am needing to solve showing all of my work

let x be a binomial random variable with n = 7, p = 0.3. find values of p(x = 4)

let x be a binomial random variable with n = 7, p = 0.3. find values of P(x = 4)

03/29/16

Governor A earns $53,925 more than Governor B. Their salary totals total $287,655. What are the salaries of each?

Im struggling getting ready for a test. Need help studying

A photocopier increases the sides of a square in the ratio 2:3. What percentage increase is this?

this question is about increase in the side of the square and what is increase in percentage

Is this a good intro, of course some things are changed for personal purposes!

Hi my name is Jessica Milly and I am from Asbury Park, NJ. I am currently enrolled into Penn Foster but I use to go to Froggy Regional High School. As a senior in high school, I threw in the towel... more

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