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# 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?

# 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...

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

I don't get how  you do x y coordinates

# Limit questions

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

# 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

# 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...

# Factor the following binomial.

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

# 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.

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

# 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

# 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?

# 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-...

# inequalities

i missed school because i was sick and missed how to do inequalities. I looked it up and it looks really confusing!!! Can you help!?!?!?!?

# When was the last Anthrax outbreak?

I just curious about the topic.

# Find an equation of the plane?

Find an equation of the plane that passes through the point P(-1, 2, 1) and contains the line of intersection of the planes x+y-z=2 and 2x-y+3z=1.

# solve 7-6a=6-7a

Can you show me the process / steps to solve?  7-6a=6-7a

y=-1/2x2

# Find the maximal value of f(x, y)?

Find the maximal value of f(x, y)=3y+4x on the circle x^2+y^2=1.