# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 220065: How do you solve the following equations? Thanks! -2x^2 – 2x +24 = 0 and 4x^2 + 11x = 3 Click here to see answer by likaaka(51)

 Question 220293: correction to first one Solve 3x^1/2 + 12 = 9 Click here to see answer by rapaljer(4667)

 Question 220298: -3/4x + 5=2 and the 3/4 is a fraction and so i was wondering if you could show me this problem step by step so i will know how to do it and understand this multi-step problem?? Click here to see answer by rapaljer(4667)

 Question 220294: I need an equation that has a domain of [-4, 5/3) U (5/3, infinity) if you could at least walk me through how to find it, that would be great. Click here to see answer by Theo(3504)

 Question 220392: Solve for the variable . -3 = 1 2/5 + x Click here to see answer by checkley77(12569)

 Question 220597: maya needs to measure 9 1/2 cups of sugar she only has a 1/4 cup to measure with. how many 1/4 cups should she use? Click here to see answer by pranav.joshi5(2)
 Question 220597: maya needs to measure 9 1/2 cups of sugar she only has a 1/4 cup to measure with. how many 1/4 cups should she use? Click here to see answer by MathTherapy(1480)

 Question 220640: A physician monitored the effects of aspirin in patients and found that if originally 200mg of aspirin is administered for a headache, sometime later, say 20minutes, only 50% of the aspirin will still be in the bloodstream. after 40 minutes, only 50 mg will still be in the bloodstream and after 60 minutes, only 25mg. a) determine a formula to establish the amount of aspirin in the bloodstream after t minutes. b) how long will it take for the bloodstream to be free of aspirin? Click here to see answer by Theo(3504)

 Question 220726: This is a word problem my son just had on a quiz and I couldn't solve either. I thought we didn't have enough info. Marshfield Middle school cluster C has 100 students in honors pre-algebra Cluster C has 30 students enrolled in after school math enrichment. If 105 cluster C students are in only one or the other of these, how many students are in both? Tried a venn diagram to get my mind around it, didn't work. (I keep thinking I need to know the total enrollment of honors pre-alg plus after school)my son said he got 12.5 as an answer, but the teacher said it would come out as a whole number. Thanks, Trish Click here to see answer by jim_thompson5910(28715)
 Question 220726: This is a word problem my son just had on a quiz and I couldn't solve either. I thought we didn't have enough info. Marshfield Middle school cluster C has 100 students in honors pre-algebra Cluster C has 30 students enrolled in after school math enrichment. If 105 cluster C students are in only one or the other of these, how many students are in both? Tried a venn diagram to get my mind around it, didn't work. (I keep thinking I need to know the total enrollment of honors pre-alg plus after school)my son said he got 12.5 as an answer, but the teacher said it would come out as a whole number. Thanks, Trish Click here to see answer by kensson(21)

 Question 220776: The larger of two numbers is three more than five times the smaller. If the sum of the two numbers is 27, find thae larger number Click here to see answer by RAY100(1637)

 Question 220774: The sum of two consecutive even integers is 40. find the two integers. Click here to see answer by Alan3354(31518)

 Question 220919: I need to factor completely, but forgot how. 8x^3-27^6 Click here to see answer by nerdybill(7003)

 Question 220927: solve by the substitution method. 7x + 9y = 32 -6x + y = 51 the solution is ___? (type an ordered pair) Thank you Click here to see answer by drj(1380)

 Question 220926: solve by the substitution method. 9x - 4y = -44 7x + 49 = y The solution is ___? (type an ordered pair) Thank you very much :) Click here to see answer by drj(1380)

 Question 220924: solve by the substitution method. 6m + n = 28 m - 3n = 11 The solution is ___? (type an ordered pair) Thank you =) Click here to see answer by drj(1380)

 Question 220923: solve by the substitution method. 3x + 9y = 3 -4x + y = 22 The solution is ___? (type an ordered pair) Thank you =) Click here to see answer by drj(1380)

 Question 220969: Write the following phrase as a variable expression. Use x to represent "a number". The sum of eight and a number added to the product of fourteen and the number. Click here to see answer by likaaka(51)

 Question 220967: solve using the elimination method 5r-6s=-5 6r+5s=55 The answer should be an ordered pair and either an integer or fraction. Click here to see answer by drj(1380)
 Question 220967: solve using the elimination method 5r-6s=-5 6r+5s=55 The answer should be an ordered pair and either an integer or fraction. Click here to see answer by checkley77(12569)

 Question 220973: would the solution (5,5) mean that there are no solutions to the equation or that there are infinitely many solutions? Click here to see answer by checkley77(12569)

 Question 220976: A 12cm piece of tubing is cut into two pieces. One piece is 4 cm longer than the other. How long are the pieces? Click here to see answer by rfer(12729)

 Question 220978: Find three consecutive odd integers such that the sum of the first, two times the second, and three times the third is 82. Click here to see answer by drj(1380)

 Question 220977: The product of 6 and nine times a number is the same as the difference of ten times the number and 2. What is the number? Click here to see answer by checkley77(12569)

 Question 221048: I need help on this word problem setting up the equation. A 2000L tank containing 550L of water is being filled with water at the rate of 75L per minute from a full 1600L tank. How long will it be before the two tanks have the same amount of water? X equals time. Not sure how to set up this equation and solve. Click here to see answer by rapaljer(4667)
 Question 221048: I need help on this word problem setting up the equation. A 2000L tank containing 550L of water is being filled with water at the rate of 75L per minute from a full 1600L tank. How long will it be before the two tanks have the same amount of water? X equals time. Not sure how to set up this equation and solve. Click here to see answer by scott8148(6628)

 Question 221017: I really cannot figure this out! Please help!!! A disk jockey must play 12 commercial spots during one hour of a radio show. Each comercial is either 30 seconds or 60 seconds long. If the total commercial time during one hour is 8 minutes, how many 30-sec commercials were played that hour? How many 60-sec commercials? Click here to see answer by ankor@dixie-net.com(15746)

 Question 221103: the length of a triangle is twice the width. The perimeter is 84 centimeters more than the width. Find the rectangles dimensions. Please help. How do you find this out without knowing the perimeter. Thank you. Click here to see answer by rfer(12729)

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