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 October 23rd, 2008, 07:12 AM #1 Newbie   Joined: Oct 2008 Posts: 12 Thanks: 0 Can you solve that problems? [[color=#FF0000]b]Use of variables and expressiions[/color] Business and finance the simple interest earned when a principal P is invested at a rate r for a time t is calculated by the principal by the rate the time. write an expression for the interest earned. pt/l Science and medicine the kinetic energy of praticle of mass m is found by taking one half of the product of the mass and the square of the velocity V Write an expression for the kinetic energy of a particle. m=1/2 [color=#FF0000]IN TERMS OF NOTION[/color] Number problem two numbers have a sum of 35 if one number is x express the other number in terms of x x=35? [color=#FF0000]Use of expressions evaluating expressions[/color] Technology the formula for the total resistance in parallel cricuit is RT=R1R2/R1+R2 find the total resistace if R1=9 ohms and R2=15 ohms 9 15/9+15= Geometry the perimeter of a rectangle of lenght L and width W is given by the formula P=2l+2w find the perimeter when L=10 inches {in} and w =5 in p=2(10)+2(5)20+10=30 Business and finance the simple interest I on a principal of P dollars at interest rate r for time t, in years is given by=1 part. find the simple interest on a pricipal of 6,000 at 4%for 3 years ( note 4%=0.04) Science and medicine the formula that relates Celsius and Fahrenheit temperatures is F=9/5+32 If the temperature is 10 C WHAT IS fahrenheit temperature? Business and finance a local telephone company offers a long distance telephone plan that charges $5.25 per month and$0.08 per minute of calling time. the expression 0.08t+5.25 represents the monthly long distance bill for a customer who makes t minutes min of long distance calling on this plan find the monthly bill for a customer who makes 173 min of longdistance calls on this plan. Science and medicine the speed of a model car as it slows down is given by v=20-4t where v is the speed in meters per second m/s and t is the time in secof s during which the car has slowed find the speed of the car 1.5 s after it has begun to slow
 October 23rd, 2008, 08:31 AM #2 Newbie   Joined: Oct 2008 Posts: 12 Thanks: 0 Re: Can you solve that problems? Please help me
 October 23rd, 2008, 12:49 PM #3 Senior Member   Joined: Jul 2008 Posts: 895 Thanks: 0 Re: Can you solve that problems? You need a complete course of study, not just a little help. Really, you should consult with your teacher or a tutor. Simply doing these will show you nothing. You need someone right there explaining things as they go along.
 October 24th, 2008, 04:05 AM #4 Newbie   Joined: Oct 2008 Posts: 12 Thanks: 0 Re: Can you solve that problems? ok can you change that words into numbers please
 October 24th, 2008, 08:16 AM #5 Senior Member   Joined: Jul 2008 Posts: 895 Thanks: 0 Re: Can you solve that problems? That won't help you. E.G. Science and medicine the kinetic energy of praticle of mass m is found by taking one half of the product of the mass and the square of the velocity V Write an expression for the kinetic energy of a particle. m=1/2 [color=#FF0000] KE = (1/2)mv^2[/color] Compare that with what you have written. As I said, you need a complete course of study/ a teacher/a tutor, not just our written solutions to these problems.
October 24th, 2008, 08:20 AM   #6
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Quote:
 Originally Posted by Rany Tandoom . . . the simple interest earned when a principal P is invested at a rate r for a time t is . . .
Prt

Quote:
 Originally Posted by Rany Tandoom . . . the kinetic energy of particle of mass m is found by taking one half of the product of the mass and the square of the velocity V.
The kinetic energy of the particle is given by $\frac12mV^2.$

Quote:
 Originally Posted by Rany Tandoom . . . two numbers have a sum of 35; if one number is x, express the other number in terms of x.
The other is $35-x.$

Quote:
 Originally Posted by Rany Tandoom . . . the formula for the total resistance in parallel circuit is RT=R1R2/R1+R2; find the total resistance if R1=9 ohms and R2=15 ohms.
$\frac{9(15)}{9\,+\,15}\text{ ohms}\,=\,\frac{135}{24}\text{ ohms}\,=\,5.625\text{ ohms.}$

Quote:
 Originally Posted by Rany Tandoom . . . the perimeter of a rectangle of lenght L and width W is given by the formula $P\,=\,2L\,+\,2W.$ Find the perimeter when L = 10 inches {in} and W = 5 in.
$P\,=\,2(10)\text{ in }+\,2(5)\text{ in }=\,20\text{ in }+\,10\text{ in }=30\text{ in}.$

Quote:
 Originally Posted by Rany Tandoom . . . the simple interest I on a principal of P dollars at interest rate r for time t, in years is given by I = Prt. Find the simple interest on a principal of $6,000 at 4% for 3 years (note 4%=0.04). I =$6,000(0.04)(3) = $720. Quote:  Originally Posted by Rany Tandoom . . . the formula that relates Celsius and Fahrenheit temperatures is F=(9/5)C+32. If the temperature is $10^\circ\text{C},$ what is the Fahrenheit temperature? F = (9/5)10 + 32 = 50. Quote:  Originally Posted by Rany Tandoom . . . a local telephone company offers a long distance telephone plan that charges$5.25 per month and $0.08 per minute of calling time. The expression 0.08t + 5.25 represents the monthly long distance bill for a customer who makes t minutes (min) of long distance calling on this plan. Find the monthly bill for a customer who makes 173 min of long distance calls on this plan. You need to work out 0.08(173) + 5.25, i.e., 13.84 + 5.25. The answer is therefore$19.09.

Quote:
 Originally Posted by Rany Tandoom . . . the speed of a model car as it slows down is given by v = 20 - 4t, where v is the speed in meters per second (m/s) and t is the time in seconds during which the car has slowed. Find the speed of the car 1.5 s after it has begun to slow.
You need to work out 20 - 4(1.5), which is 20 - 6, i.e., 14. The speed of the car will be 14 m/s.

 October 24th, 2008, 12:27 PM #7 Newbie   Joined: Oct 2008 Posts: 12 Thanks: 0 Re: Can you solve that problems? Thank you very much

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