word problem set up

angel has 5% alcohol soulution and 20% alcohol solution. She needs 30 liters of a 10% alcohol solution. How many liters of each should she mix to get 30 liters?

2 Answers | 0 Votes | Bre from Euclid, OH 5/6/2013

If you add 3 to my age and divide the sum by 5, you will have my daughter's age. But 3 years ago I was 8 times as old as my daughter was. find their ages now.

I've got (m+3)/5 =d and m-3=8d My teacher wrote m-3=8(d-3). But no matter which equations I use. I keep getting decimals, negative numbers, or fractions for the ages. Please help and explain...

1 Answer | 0 Votes | Roxi from Albuquerque, NM 5/8/2013

I don't get y=m(x) + b

I don't get how you do x y coordinates

2 Answers | 0 Votes | Joe from Atlanta, GA 5/8/2013

Limit questions

Evaluate the limit.. Lim x-->0 1-cos 5x / 1-cos 7x

2 Answers | 0 Votes | Aqib from Carrollton, TX 5/8/2013

equation of a locus

Find the equation of a locus of point whose distance from the point (2,-2) is equal to its distance from the line x-y=0

2 Answers | 0 Votes | Aqib from Carrollton, TX 5/8/2013

Can you find the regular price of the snowboard if the snowboard at the left is on sale for $12.74. The snowboard is on sale for 60% off?

Can you find the regular price of the snowboard if the snowboard at the left is on sale for $12.74. The snowboard is on sale for 60% off? I need to know the steps in how to solve this problem...

3 Answers | 0 Votes | Tykia from Greenbelt, MD 4/30/2013

Factor the following binomial.

100x^2 - 1 Select the correct choice below. (a) 100x^2 - 1=? (b) The polynomial is prime.

2 Answers | 0 Votes | Jamal from Oregon, OH 5/8/2013

how to find the range and domain of y=-18x^2+300x+100

Please explain how to find the range an d domain of the given function.

1 Answer | 0 Votes | Michelle from Gainesville, FL 5/14/2013

I Cant solve this help! x^2+y^2-6x+8y=-9

x^2+y^2-6x+8y=-9

1 Answer | 0 Votes | Hans from Winter Park, FL 5/14/2013

why cant you divide by zero, wont it just be zero?

my teacher asked this but i dont know why you cant divide by zero

19 Answers | 1 Vote | Gady from Roy, UT 10/23/2012

What is a shape that belongs to both of these groups:"all sides are the same length" and " no square corners?"

What are the shapes that have sides that are the same length and don't have square corners?

2 Answers | 0 Votes | Edison from Flushing, NY 5/7/2013

calculus question......

the position function s of a point is given by two dimensional quantities where t in seconds and the y direction is affected by gravity (10m/s/s). y(t)=4t*sin(θ) - 5t2 & x(t)=4t*cos(θ) 1-...

3 Answers | 0 Votes | Ted from Purcellville, VA 4/29/2013