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Question 153467: If a client wants to spend Total of $25.00 on food, including the tax (7.75%) and the tip (20%), what is the price of the food alone. Is there some sort of an equation or a formula?

Click here to see answer by vleith(2825)

Question 153804: When doing an equation such as...
Negatuve one eigth of a number is -3/4
What am I to do
Click here to see answer by checkley77(12569)

Question 154204: P = (N/r)( 1 - (1 + r)-n )
P = (20000/0.05)( 1 - (1 + 0.05)^-20 )
= 400000(1 - .37689) = $249,244
This is the formula and the solution. Can someone PLEASE tell me how they did (1-(1+0.05)^-20) and reached the .37689.
I am desparate and no one has answered the last 2 questions I have posted. Am I posting in the wrong area?
Click here to see answer by Earlsdon(6287)

Question 154220: A company determines that its total cost is given by the function
C(x) = 2.5x^2 - 125x + 10,000 where x is the number of units produced and C(x) is in dollars.
A. How many units mut be produced to minimize cost?
B. What is the minimum cost?

Click here to see answer by ankor@dixie-net.com(15645)

Question 154218: Knowing that the distance a runner runs varies directly with the hours of sleep the night before find how far a runner runs on 8 hours of sleep if it is known that a runner ran 5 miles on 4 hours of sleep.
Click here to see answer by Alan3354(30993)

Question 154255: Can someone please tell me if this is correct.
I won the lottery and will recieve 12000 per year for 10 years.
At 12% interest how much should the lottery invest to pay out this amount for the next 10 years?
P=(N/r)(1-(1+r)^n)
I came up with 67,802.68. Am I correct?
Click here to see answer by jim_thompson5910(28536)

Question 154226: a man invested $6000, part of it at 5%simple interest and the rest at 7% simple interest. If his annual interest income is $372, how much did he invest at each rate?
Click here to see answer by checkley77(12569)

Question 154497: Find the present value of $5600 to be compounded at 7% for 9 years?
Click here to see answer by ariverajr(1)

Question 154715: 8+[5-6]

Click here to see answer by Alan3354(30993)

Question 155258: The break-even point for a business is given by the formula: B=F/P-V in which
B= units sold to break-even point, F= fixed costs, P= price per unit, v= variable costs
Network systems is introducing a new network card. Suppose network Systems knows its fixed costs are $600,000, its variable costs are $500 per card, and it must sell 15,000 cards to break even the first year. What is the minimum price per unit it should charge?
Click here to see answer by jojo14344(1512)

Question 155257: The future value of an investment is the value of the investment after a certain period of time and is given by the formula: FV=PV(l+i)^n in which
FV= future value, PV= present value, i=the interest rate, n= the number of years invested
Find the future value of an investment of $120,000 in 5 years from now if an investment earns 5% annual interest for the next 10 years.
Click here to see answer by nerdybill(6951)

Question 155385: Please help me to solve this problem.I really don`t understand and drastically need help. Thank you so much for all that you do! Please help me! Here is the problem:

Tommy has 40 coins(all nickels, dimes, and quarters) worth 4.50. He has 7 more nickels than dimes. How many quarters does Tommy have? Write an equation.

Thanks again so much for the help!
Click here to see answer by stanbon(57282)

Question 155586: can you show me how to solve this problem
-5(7-4)2 divideby 3-12
Click here to see answer by jojo14344(1512)

Question 149323: GRAPH THE PIECEWISE FUNCTION GIVEN BY f(X)= { X+1 IF X < O
{ -X2 + 2 IF X >_ O

X IS SQUARED AND THE SYMBOL IS GREATER THAN OR = TO

Click here to see answer by Fombitz(13828)

Question 155860: w-0.2w=7.2
Click here to see answer by Earlsdon(6287)

Question 156314: 9x-9=5
Click here to see answer by jojo14344(1512)

Question 156615: what is the best way to solve an algebra question?
Click here to see answer by nabla(475)

Question 156815: How many kilograms of antifreeze must be added to 10 kg. of 20% antifreeze solution to produce a 50% solution?
Click here to see answer by nerdybill(6951)

Question 156813: A hardware store sells large nails for $5.00 per killogram and small nails for $2.00 per killogram. The owner wants to mix the nails tog et 20 kg. of a mixture that would sell for $3.50 per killogram. How many killograms of each size does the owner need.
Click here to see answer by nerdybill(6951)

Question 156812: A certain paint mixture sells for $3.40 per liter and contains white and red paint. The white paint is valued at $3.00 per liter and the red at $4.00 per liter. If 10 L of this mixture is needed, how much white and red must be used to make it?
Click here to see answer by nerdybill(6951)

Question 156807: find the accumulated value of an investment of $8,000 at 9% compounded continuously for 4 years.
Click here to see answer by checkley77(12569)

Question 156983: OFF TOPIC QUESTION! SORRY!
I'm really sorry to be asking this here as I know that it is a math homework help website. However, I have an english homework question. I have four sentences from an essay that have an error in them somewhere and I can't figure out where. I dont expect anyone here to help me, but i would really apperciate it if any of you might know of a helpful site like this for english? I really appericiate you all taking your time to help students and I thought you might know of a place that could help. Thank you so much!!
I need to revise these sentences and I can’t figure out what I did wrong. Thanks!
At the same time, a five foot five, one hundred
and fifty pound, average women passes by.
Of course the first women with her lanky body
and perfect bone structure is going to stand out.
While the first women should still be the one to
stand out as unusual, it’s the opposite.
The average women would be seen as odd,
undesirable, and unwanted.

Click here to see answer by scott8148(6628)

Question 157241: I have eight more quarters than dimes. If the coins are worth $6.20, how many dimes are there?
Click here to see answer by nerdybill(6951)

Question 157240: The Lengths of the sides of a triangle are consecutive even integers. Find the length of the longest side if it is 22 units shorter than the perimeter.
Click here to see answer by checkley77(12569)

Question 157585: Carol invested $12,000 for one year, part at 10% annual interest and the balance at 12% annual interest. After the one year she earned $1420 in interest. How much was invested at each rate?
Click here to see answer by checkley77(12569)

Question 157607: The Rileys have $27,000 to invest. they intend to invest part of the money in certificates of deposit at 8.5% and the remainder in a savings account at 5%. If they wish to receive the same income from each investment, how much should they invest in each?
Click here to see answer by checkley77(12569)

Question 157614: Hey I need help with this word problem that has to do with algebra and finance:
Shannon had five times as many quarters as dimes in her jar. if the total value of the dimes and quarters are equal $16.20, how many of each kind of coin did she have in the jar?
oh and please define the variable.
sorry this is such a long question but ive thought long and hard and just cant thing of a way to solve it while defining the variable and answering it in a therefor statement
Click here to see answer by nerdybill(6951)

Question 157728: Three coins are tossed. Find the probability that no more than one coin lands heads up.
Click here to see answer by jojo14344(1512)

Question 157726: Dr. Sand borrowed some money to buy new furniture for her office. She paid $245.00 simple interest on a 3.5-year loan at 3.5%. Find the principal.

I got $2,400 but I was told that is not correct. What have I done wrong?
Click here to see answer by vleith(2825)

Question 157734: Find the maturity value.
Principle is $1,400
Rate is 16%
Compounded quarterly
Time is 6 years.
I came up with $3,588.63 - is this correct?
Click here to see answer by checkley77(12569)

Question 157929: How can I make $5.11 out of 31 coins? I can only use pennies and quarters
Click here to see answer by Fombitz(13828)

Question 158097: algebraic expression for somme number x divided by three

Click here to see answer by vleith(2825)

Question 158261: Harrison earns $15 per hour cutting grass and $11 an hour selling papers. One week he earns $459 working a total of 37 hours. How many hours did he work at each job?
Click here to see answer by checkley77(12569)

Question 158452: You pay $38.50 for a sweater that is marked 30% off the reguar price. What is the regular price of the sweater? How much did you save by buying it on sale?
Click here to see answer by checkley77(12569)

Question 158852: Part of $13,750 is invested at 9% interest and the rest is invested at 8%. After on year, the accounts paid $1,185 in interest. How much was invested at the lower rate?
Click here to see answer by checkley77(12569)

Question 158989: what is another way of asking :
Begin your budget by recording the amount of money your earn ,the amount of money you save , and the amount of money you spend for two weeks .
Click here to see answer by gonzo(654)

Question 159127: 5+5=
Click here to see answer by Alan3354(30993)

Question 155884: 12x+16y=168
Click here to see answer by Alan3354(30993)

Question 159184: I am taking a Survey of Accounting Concepts class and I haven't taken Algebra in a very long time. I've forgotten how to solve this type of equation. We are working on Contribution Margin Rates. I'm trying to solve for R. Please do all the steps so that I can translate this to other "solve for..." problems. Thanks!
480=0.2R-6000
Click here to see answer by nerdybill(6951)

Question 159231: Factoring Completely: How do you factor a problem like this: (x^2 + 10x + 21)

Click here to see answer by KnightOwlTutor(293)

Question 159226: Factoring Completely: how would you factor a problem like this one, whats the answer? (5x^2 - 10x)
Click here to see answer by KnightOwlTutor(293)

Question 159230: Factoring Completely: How do you factor a problem like this: (x^2 + 10x + 21)

Click here to see answer by Alan3354(30993)

Question 159224: Factoring Completely: how would you solve this problem? (x2 + 12xy + 35y2)
Click here to see answer by KnightOwlTutor(293)

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