Mathematics

Total Purchase Price

Im doing math homework and Ive pretty much forgotten how to the rate of sales tax, Total Purchase price, etc.. 1.Carl has a sales slip that shows purchases of a briefcase for $59.99, 2 notepads at $0

Math homework ???????

Can someone show me how to factor the following: 4 m^4 n^2 - 20 m^3 n^3-4*(m^3)*(n^2)*(m - 5*n)-http://www.wolframalpha.com/input/?i=4+m…-idk lol but um if i reach in my bag i can find something reach

Can anyone answer this

Base price: $15,555 Options: 425 Destination charges: $250 Sticker price: $16,230 Profit margin: __________ Dealer profit: $1,275 Answers:0.079%12.7%7.86% Working on business math. Please tell me ho

Grade 9 Math (find missing variable)

y:4.5=13.5:18 ?????-set this as two fractions equal to one another ..y.......13.5 ------ = --------cross multiply: top of first x bottom of second = bottom of first x top of second4.5.......18 18y =

Algebra problem...I think...should be just plugging in

W = Y + (Z * W) X = (Y * W) + Z I have W and X, need to find Y and Z. Is this possible? If so, how? W = -0.72133 X = 0.80747 These are yule-walker equations for calculating the coefficients in an A

Help in A level maths needed!

Anyone know how to change Sin(Pi/4) into a fraction? The answer is 1/Square root 2 but I dont know how to get that....-sin( pi/4) is the y-polar coordinate sqrt(2)/2.Multiply top and bottom by sqrt(2)

What two numbers can you multiply to get -16 and add together to get -15

Im guessing youre trying to factor.Well, because you need to get 15, its obviously going to be some kind of 16 and 1.But you want a negative product, so one number will be negative.You also want a neg

Algebra help asap please show how to do in steps in each problem thanks

1.2x + 7y = 3x=1-4y 2.y = 5x2x + 3y =34 3. 3x - 5y = 11x - 3y = 1 4. 2x - y = 8y = 2x - 3 5. 1/3x - y = 2x - 3y = 6-2x + 7y = 3 Plug in x = 1-4y 2(1 - 4y) + 7y = 3 2 - 8y + 7y = 3 2 - y = 3 -y = -

I don't know how to do this problem!!!!!

i need to find a way to solve this problem, please help! what is the units digit of3^1 * 3^2 * 3^3 * 3^4 * ...........3^99 * 3^100 ? please help me-Start out and see what happens. 3^1 = 3 3^2 = 9 3^

How is the (2 x the Sqrt of 2) the same as Sqrt of 8

So how come 2 ( sqrt 2) is the same as the square root of 8? How does it work, and what is the rule so I can apply to other questions to simplify square roots.-When simplifying square roots, you must

How do I solve this half-life/Exponential decay problem

An isotope has a half-life of 693 years. Determine the annual decay rate, r. There is more to the problem, but I just need to know how to find r.-The proportion of the active constituent diminishes to

How is this percentage correct

In my class, total, I have a score of 623 out of 700. 89%. If I get 100% on my final, I will have 723 out of 800. 90%. I dont get how this is right. I mean, I can see that it is, but I dont understa

Is the event independent or dependent

Event: selecting a piece of fruit, and then choosing a drink Event: buying a CD, then going to another store to buy a video tape if you have enough money left Begin with a box of marbles that contai

Solve the Equation √2x+3=x

2x+3 is inside the square root-first, square both sides so you have 2x+3=x^2 then subtract 2x+3 over so you have x^2-2x-3=0 then just factor to (x-3)(x+1)=0 i got 3 and -1 but if you check it you wil

I have a primary 6 Maths question to ask. I'm not too sure how to solve it. I need help!

Qn) It takes Mr lim 7 hours to paint the room by himself. If Mr Tan helps him, they will take 3 hours to paint the room. How long will Mr Tan take to paint the room by himself?-Its simple. Lim takes 7