09/19/14

how to get answer?
A toy rocket is launched from a 5.6 m high platform in such a way that its height, h (in meters), after t seconds is given by the equation h= -4.9t^2+38.5t+5.6t. How long will it take the rocket to... more
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09/19/14

what is the purpose of learning your native language in school education?
i mean we already talk in our native language daily and in a pretty understandable way. Why we still need to learn it? what skills do we develop by learning it and what is the ultimate goal of... more
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09/19/14

Please solve
this one I am struggling with 2. Each of the following refers to three quantities. Introduce variables to represent the first two of these quantities, and then represent the third quantity in terms... more
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09/18/14

How many beams can go across the bridge
A bridge can support a maximum wight of 7200 lb. A delivery truck carrying metal beams for construction has a weight of 4500 lb. when it is carrying nothing but its driver. Determine the maximum... more
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09/18/14

calculate the value of a when 3ax^3+2x^2-7x+3 divided by 2x+1. gives a remainder of( -a over 2)
3ax3+2x2-7x+3  divided by 2x+1 gives a remainder of  (-a/2)
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09/18/14

ted andrews bought 15 shares of clrk company stock $14.875 he sold them a month later at $20.375 what was his profit?
I don't understand at all
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09/17/14

Math question (Algebra)
If f(x)=2^(3x+1)Show that f(x+1)-f(x) is divisible by 7 if x is a whole, non-negative number.I tried solving this but I always block at the same place and have no clue how to proceed.
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09/17/14

rational numbers
Give me examples of 4 different types of number that are considered rational numbers.  I answered (1, 5, 9, 10) and missed -1/2. 
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09/17/14

A photograph measuring 8 inches by 12 inches is to be surrounded by a mat. Determine an expression for the area of the mat.
MORE DETAIL.   A photograph measuring 8 inches by 12 inches is to be surrounded by a mat before framing. Determine an expression for the area of the material needed to make the mat. In standard... more
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09/17/14

prove tan(x/2) = (1-cosx)/(sinx)
There is the evaluation above on your website but I am unaware of the mathematical logic behind it. Could you please explain.    Prove tan(x/2) = (1-cosx)/(sinx). I imagine it uses the t=tanx/2
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09/17/14

How many mm^2 in one square kilometer?
This is a practice problem that I got for homework, you have to solve it through dimensional analysis. Help.  
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09/17/14

WORD PROBLEM
an actor invests some money at 9%, and 2600 more than twice the amount at 10%. The total annual interest earned from the investment is 29570. How much did he invest at each amount?
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09/17/14

a) What is wrong with the equation (x^2+x-6)/x-2=x+3 b) In view of part a explain why the equation is correct lim x->2(x^2+x-6)/x-2=lim x->2(x+3)
I get x + 3 = x + 3. What am I not seeing here?
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09/16/14

Average speed of a biyclist
 A bicyclist travels the first 800 m of a trip with a speed of 10 m/s, the next 500 m with an average speed of 5 m/s and the final 1200 m at a speed of 13 m/s. Find the average speed of the... more
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09/16/14

A car travels 3/1000 of a mile in 1/200 of a minute. What is the car's speed?
Trying to find the speed of the car.
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09/16/14

Dots sells a total of 317 T-shirts ($2) and shorts ($4). In April, total sales were $646. How many T-shirts and shorts did Dots sell?
There are no additional details about my question. It is straight forward in the question.
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09/15/14

9. A fence is to be built around an area such as the one shown below, area a minimum and the perimeter is to be 300m? x x x y y 4y
9. A fence is to be built around an area such as the one shown below. What must be the values of x and y if the area is to be a minimum and the perimeter is to be 300m? inverted T-shape  Bottom... more
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09/13/14

Prime number
138,215,030 is a product of 3 prime numbers. Which ones?How am I supposed to calculate this?
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09/13/14

lim of (x+1)/(x+2) when x->3+
lim (x+1)/(x+2) x->3+ how would a + or - on c change anything when solving without a graph?
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09/13/14

Problemsolving
1/5 of the workers on a company drives their car to work. 3/8 of the ones who are NOT driving, are taking their bicycles to work. The rest use public transport. How many employees use public... more
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09/11/14

You charge $2 per square yard to paint. Which equation can you solve to find the amount you will charge to paint a triangular wall with a base of 4 yards and a
You charge $2 per square yard to paint. Which equation can you solve to find the amount you will charge to paint a triangular wall with a base of 4 yards and a height of 6 yards?
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09/11/14

Sprinklers are programmed to run at midnight in three different zones. The Sprinklers turn on at midnight and run till 7am.
If sprinklers in zone one turn on every 90 minutes, zone two every 40 minutes, zone three every 45 minutes: In how many minutes after midnight will all three zones turn on at the same time for the... more
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09/11/14

Solve the system by finding the reduced row-echelon form of the augmented matrix.
Solve the system by finding the reduced row-echelon form of the augmented matrix.x+2y-4z=-4 -x-y+3z=2 x+3y-5z=-6 How many solutions are there to this system?
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09/10/14

which number acts like a base or 0 in this situation?
average deviation from daily calorie standard       rob         jorge        elan       pietro      bill +540     -125          +610      -220      +125         standard : an active 12... more
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09/10/14

I need help with a word problem. Matrix form of system of equations
I am having trouble with this word problem. I need to find the profit of both the San Francisco and Los Angles store. In January, the Left Coast Bookstore chain sold 700 hardcover books, 1,400... more
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