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# use the angle sum or difference identity to find the exact value of sin 15 degrees

I don't understand what to do after i the two numbers like (45-30)

# Algebra 1/Algebra 2 Factorization Problems

Hi. I have a hard time with Algebra 1/Algebra 2 Factorization Problems. Can someone explain them in-depth and offer some examples? Clarify the mystery for me. Thanks!

# what's the inverse of f(x)=-(x-2)^1/2+4

what's the inverse of f(x)=-(x-2)^1/2+4

# Solve for b

(B+2)(b-3)=-6 solve for b

3k3=27k

16a2+56ab+49b2

4y2-5=12y

# Sum of roots

2(x2-1)=7x+13 solve an sum of two roots

# What digit is in the units place of the number that is 2/3 of 27^10?

Help... I am so confused with this problem.

# How do you simplify (2x-5)/(x-2)+(x-8)/(x+4)

I've multiplied it out so that they both have a common denominator of (x+4)(x-2) and now I'm confused on what to do next.

# 9t raised to the second power - 49 while using square method

the problem is above

6x+5y+2z=830 3x+7y+4z=820 x=22-2z solve for the variables

Let C be the cost and N be the number of copies made Then:          .12xN  for   0<N≤100 C =  .09xN  for  100< N<500  ...

# I dont know how to create and solve a piecewise function from a word problem

Your company has decided to distribute flyers advertising your new salsas. The local copy shop charges 0.12 per photocopy for 100 copies or less, then drops the price to 0.09 per copy, after the first...

# solving polynomials 8v( v- 10)

The problem is 8V (v-10)

# 160 athletes are distributed with a mean finishing time of 72.2 min and standard deviation of 6.8 min

160 athletes are distributed with a mean finishing time of 72.2 min and a standard deviation of 6.8 min What is # of athletes with finishing times between 58.6 and 72.2 min

(5x-4) + (5-2x)

# simplify the expression (-4+ v ^2)-(-3v ^2 +3)

simplifying polynomials the ^ is to the power of

# using elimination

What is the solution to the linear system? x+y=2 3x-2y=-9

# what is the solution to this linear system?

This is the question: x+y=2                               3x-2y=-9