# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 176729: Maggie makes a \$9.25 purchase at a bookstore in Reno with a \$20 bill. The store has no bills and gives her the change in quarters and fifty-cent pieces. There are 30 coins in all. How many of each kind are there? please help me! thank you!! Click here to see answer by solver91311(16897)
 Question 176729: Maggie makes a \$9.25 purchase at a bookstore in Reno with a \$20 bill. The store has no bills and gives her the change in quarters and fifty-cent pieces. There are 30 coins in all. How many of each kind are there? please help me! thank you!! Click here to see answer by checkley75(3666)

 Question 176744: why is 3 to the zero power equals 1? Click here to see answer by Mathtut(3670)
 Question 176744: why is 3 to the zero power equals 1? Click here to see answer by MathTherapy(1425)

 Question 176768: Hi, Suppose y varies directly with x. Write an equation relating x and y. y = -6 when x = -2 Thank you, Andy 7th grade (8th grade math) Click here to see answer by stanbon(57361)

 Question 176781: Mia's motorboat took 3 hours to make a trip downstream with a 6 mph current. the return trip against the came current took 5 hours. find the speed of the boat. please help me thank you! Click here to see answer by stanbon(57361)

 Question 176782: Soybean meal is 16% protein and corn meal is 9% protein. How many pounds of each should be mixed to get a 350 lb mixture that is 12% protein. Thanks for your help! Click here to see answer by Mathtut(3670)

 Question 176851: s=2b+ph solve for h when b is area of base; p is perimeter of base; h is height of prism. Thanks in advance. Click here to see answer by Alan3354(30993)

 Question 176804: 1. Nine years ago,the sum of Carlo's age and Ronald's is greater than 28. Carlo is 6 years older than Ronald. How old is Ronald now? 2. Group the pairs of terms having a common monomial factor. 3. Determine the common monomial factors. Click here to see answer by Edwin McCravy(8909)
 Question 176804: 1. Nine years ago,the sum of Carlo's age and Ronald's is greater than 28. Carlo is 6 years older than Ronald. How old is Ronald now? 2. Group the pairs of terms having a common monomial factor. 3. Determine the common monomial factors. Click here to see answer by Mathtut(3670)

 Question 176939: I need help with this problem to. The number on three raffle tickets are consecutive integers who sum is 7503. Find the integers. Click here to see answer by ankor@dixie-net.com(15656)

 Question 176970: NUMBER THEORY: Four times the sum of 3 consecutive intergers is 48. A. Write an equation that could be used to find the intergers B. What are the intergers. Click here to see answer by checkley75(3666)

 Question 177009: 3y^2 + y - 5 = 0 How do you solve this? Click here to see answer by Fombitz(13828)

 Question 177016: I am struggling with this problem, I want to understand the steps so that I can work the problem on my own. s=vt+1/2at^2 Click here to see answer by rapaljer(4667)

 Question 177036: x-4/2 - 1/4 = 6x-1/20 I am having so much trouble with this problem. My answer is 7 but it doesn't work with the problem. Thanks for the help. Click here to see answer by jim_thompson5910(28595)

 Question 177079: I'm trying to help my granddaughter. I'm stumped p-4/9p = -7/9 Click here to see answer by nerdybill(6961)

 Question 177087: I need help with this problem property of equality can someone please show me how to solve this problem please. 7r/12=-14 thank you Click here to see answer by stanbon(57361)
 Question 177087: I need help with this problem property of equality can someone please show me how to solve this problem please. 7r/12=-14 thank you Click here to see answer by jim_thompson5910(28595)

 Question 177090: (5x2 + 7y - 6z2), (4y + 3x2), (2y - 2x2) all my problem says to do is add. I cant remember how to do this Click here to see answer by checkley75(3666)

 Question 177108: Could you please confirm that I have configured the following formula for the length of an organ pipe correctly: Given formula F = v/4(l + c ) where F is frequency, v is velocity of sound, l is pipe length and c is an end correction. Is it correct to say: l + c = v/4f, that is is the correction is added to the length of the pipe or subtracted? Click here to see answer by stanbon(57361)

 Question 177143: Thank you very much for the answer Now i have another question can you explain me the process of how this ended up given (25/28)d + 9 = d I have the following d/6+d/12+d/7+5+d/2+4=d I do get where the 9 comes from, but i tried to add that up by using LCD and it did not give 25/28. Please can you explain me the process... Thanks as always Click here to see answer by jim_thompson5910(28595)

 Question 177197: A graduate student in chemistry needs 172 liters of a 41% saline solution. How many liters of an 18% saline solution must be mixed with a 61% saline solutionto obtain the required new solution? Click here to see answer by stanbon(57361)

 Question 177241: Good afternoon dear tutor how do i go from 3W=2L+3 to (2/3)L+1 what happened to the 3 please explain thanks Click here to see answer by jim_thompson5910(28595)

 Question 177238: Solve and check. Begin by rewriting the equation without the fraction. 2x/3-5=7. I have no idea how to change the fraction 2x/3 and then to solve the equation. After solving it how do I put the answer back in to check it? Click here to see answer by jim_thompson5910(28595)

 Question 177255: Good afternoon I have 1/x + 1/1.25x = 1/5 I guess i'm confused why can i multiply through by 5x in order to get 5+5/1.25=x Could you please explain the process and also offer some tips when dealing with fraction. Thanks a lot Click here to see answer by jim_thompson5910(28595)