# Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

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 Algebra: Evaluation of expressions, parentheses Solvers Lessons Answers archive Quiz In Depth

 Question 173053: assume that x is a positive number. use logarithm properties to present the expression log (x+5)-log x as a logarithm single qty. Click here to see answer by nerdybill(6958)

 Question 173054: This is an expression involving square roots using the FOIL method. (sqrt 6 + sqrt 5)(sqrt 6 - sqrt 5) (sqrt 6 x sqrt 6)-(sqrt 6 x sqrt 5)+(sqrt 5 x sqrt 6)-(sqrt 5 x sqrt 5) sqrt 36 - sqrt 30 + sqrt 30 - sqrt 25 6 - sqrt 30 + sqrt 30 - 5 Ok, here's where I'm confused: if the negative and positive of sqrt 30 cancel out, does that leave me with 6 - 5 = 1, or 6 - (-5) = 11? Thank you. Click here to see answer by Fombitz(13828)

 Question 173070: t or f? the points (8,6) (0,5)(8,4) lie on the following line? y=1/8x+5 Click here to see answer by scott8148(6628)

 Question 173049: Use the properties of logarithms to write the expression in terms of the logarithms of x,y, and z. log 4 sqrtx^3y^5/z^4 Click here to see answer by Alan3354(30993)

 Question 173478: 1/(2X-4)- 2/(y+1)=0 and 1/(x-3)- 1/(y+4)=0 Solve using elimination: Click here to see answer by ankor@dixie-net.com(15646)

 Question 173845: 3^2 - (-7 + 2) Can someone Please show me how to this?Thank You! Click here to see answer by stanbon(57290)

 Question 174078: some students simplify 2x^2-32/x-4 as 2x-8/x-4 =2x-8. choose values of x to mshow this is not true. Then simplify it correctly. Click here to see answer by ptaylor(2048)

 Question 174174: find the celsius temperature when the fahrenheit is -50degrees. Using the formula F=1.8C+32 round your answer to the nearest tenth. Click here to see answer by jim_thompson5910(28536)

 Question 174197: 1. A student pilot was required to fly to an airport and then return. The average speed on the way to the airport was 115mph, and the average speed returning was 172.5mph. Find the distance between the two airport if the total flying time was 5 hrs. 2.2x/3-11/2=-3/2 Click here to see answer by stanbon(57290)

 Question 174241: 1. three times the difference between three times a number and three is twenty-seven. find the number. 2. the sum of three consecutive odd numbers is 99. find the first number. 3. find two consecutive even integers such that six times the first equals four times the second . find the larger number Click here to see answer by Mathtut(3670)

 Question 174263: 1. find the x and y intercepts for 6x-4y=12 2. find the equation of a line that contains the point (0,2) and has a slope -3. 3. find the equation of a line that contains the point(1,0) and has a slope of 2. Click here to see answer by jim_thompson5910(28536)

 Question 174257: 1. the sum of the square of rwo consecutive integers is forty one. find the two integers. 2. the length of a rectangle is 3 in. more than twice its width. its area is 152in^2. find the width of the rectangle 3. find the x-and y- intercepts for 6x-4y=12. Click here to see answer by josmiceli(9668)

 Question 174248: 1. Find the equation of the line that passes through the points (-4,-11)and (-2,-3). 2. find the slope of the line containing the given points. P1(3,11), P2(6,17) Multiply 3. (x^2-7x+5)(3x-3) 4. 6x^10-3x^8+1/x^4 Click here to see answer by nycsub_teacher(90)

 Question 174307: 1. A passenger train leaves a train depot two hours after a freight train leaves the same depot. The freight train is traveling 20 mph slower than the passenger train. Find the rate of the passenger train if the passenger train overtakes the freight train after 3.2h. 2. Find the slope and y-intercept of the line -2x+3y=3. 3. find the equation of the line that contains the point (-1,0)and has a slope of 2. Click here to see answer by stanbon(57290)

 Question 174254: solve and check: 1. 5.6(s+7)=34.4+6.8s multiply 2. (x^2-7x+5)(3x-3) factor 3.21c^2+6cy-35c-10y Click here to see answer by ankor@dixie-net.com(15646)

 Question 173035: 6) The test scores in Mrs. Kaste's Math B class are normally distrubuted with a mean of 85 and a standard deviation of 5. Between what two scroes would 95.4 percent of the scores fall? 1) 70-100 2) 75-95 3) 80-90 4) 85-90 7) The heights of the tides at jones beach, ny are a function of the time of day. The time from oine high tide to another is approximately 13 hours. Which of the following types of functions would best model this situation? *Explain why for the graph 1) exponential 2) linear 3) logarithmic 4) trignometric 8) Solve for x: (3 + 2i) + (4 + xi)= 7 - 5i 1) -7 2) -3 3) 3 4)7 Show work please, thanks Click here to see answer by nycsub_teacher(90)

 Question 174735: write the phrase as a variable expression. 7 times the sum of U and V Click here to see answer by stanbon(57290)

 Question 175190: 21) 3-1 – 6-1 22) x-12 / y-1 23) (5x³)²/x7 24) (x6 / x²)-3 Click here to see answer by nycsub_teacher(90)

 Question 175187: desperately need some type of help. USE FOIL 8) (7-2y)(10-3y) 9) (5z-2)(5z+2) 10) (x-6)² 11) (2-3x6)² Click here to see answer by nycsub_teacher(90)

 Question 175193: 25) 3x³*5x14 / 20x14 35) (-64)^1/3 = 36) (81)^1/4 = thanks for the help Click here to see answer by nycsub_teacher(90)

 Question 175192: SIMPLIFY 30) -SR(16) = 31) SR(-16) = 32) SR(1/81) = 33) SR(25-16) = 34) SR(16-25) = Click here to see answer by nabla(475)

 Question 175186: i am so confused: 5) (3x-4)(x+5) 6) (x+2)(x²+x+5) 7) (x+1)(x³+4x²+7x+3) Click here to see answer by Alan3354(30993)

 Question 175185: Math is my weakest subject and I really need help: 1) (8x² + 5x –3) + (12x² +7x –14) 2) (4x³+5x+13) + (-4x²+22) 3) (3x²-8x-2) - (11x²+5x+4) 4) (5y³+y²-3y-8) - (y²-8y+11) Click here to see answer by Mathtut(3670)

 Question 175251: 6 x n n = 21,36,59 trying to help the kid Click here to see answer by stanbon(57290)

 Question 175578: I know these general prices: pulpwood is \$7.00 per ton C/S is \$12.00 per ton and sawtimber is \$29.00 per ton. This ratio between prices should be maintained for the solution. I have determined that one acre of land has 20 tons of pulpwood 60 tons of C/S and 30 tons of sawtimber. I have sold the wood to someone who paid me a lump sum of \$12,000..00. How much was paid for each unit of wood; pulpwood=?per ton, C/S =?per ton, and sawtimber = ? per ton. The answers should if possible result in the same ratio between prices as the beginning statement. I would also like to know how to solve this problem so that I can plug in the correct varriables. Thanks, Click here to see answer by stanbon(57290)

 Question 175681: 4.) Simplify (3x – 5)(2x +1) 5) Simplify (x2 + 4)(x2 – 5) Click here to see answer by stanbon(57290)

 Question 175680: 11) Simplify -24a3b5 + 36a2b2 – 12ab2 divided by –4ab. can you show the work please. Click here to see answer by stanbon(57290)

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