# Questions on Algebra: Equations answered by real tutors!

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 Question 750842: What's the x-intercept and y-intercept of the equation 2y+x= 12 Click here to see answer by Cromlix(2315)
 Question 750842: What's the x-intercept and y-intercept of the equation 2y+x= 12 Click here to see answer by Yanisleysi (5)

 Question 750410: A bottling company produced a cyndrical can which has a capacity of 1litre.The radius of the cylinder is 2,82cm.Calculate the height of the can correct to one decimal place Click here to see answer by Cromlix(2315)

 Question 750868: This was the first problem I had. I do not understand equations whatsoever. Not two-part equations, not one-part equations, not any equation! Please help me! First, I tried: (1/3)(9x-12)=4x-9 1/3(9x)-1/3(12)=4x-9 (3x-4)=4x-9 3x-4x=-1x 4x-4x=0 -1x-4=-9 -9+4=-5 -1x=-5 x=-5 I got this question wrong, but I don't know how! Thank-you for your time, Sarah Click here to see answer by JoeTaxpayer(186)
 Question 750868: This was the first problem I had. I do not understand equations whatsoever. Not two-part equations, not one-part equations, not any equation! Please help me! First, I tried: (1/3)(9x-12)=4x-9 1/3(9x)-1/3(12)=4x-9 (3x-4)=4x-9 3x-4x=-1x 4x-4x=0 -1x-4=-9 -9+4=-5 -1x=-5 x=-5 I got this question wrong, but I don't know how! Thank-you for your time, Sarah Click here to see answer by jim_thompson5910(29613)

 Question 750876: Write the equation of the line with slope = - 4 and containing the point (- 2, 5). Click here to see answer by jim_thompson5910(29613)

 Question 750351: where does the line y = 3x+7 cross the y axis Click here to see answer by Cromlix(2315)

 Question 750877: Find the equation of a line passing through the point (- 10, 1) and perpendicular to the line y = 2. Click here to see answer by jim_thompson5910(29613)
 Question 750877: Find the equation of a line passing through the point (- 10, 1) and perpendicular to the line y = 2. Click here to see answer by stanbon(60771)

 Question 750881: find the equation of the line passing through (3, - 3) and parallel to 7x + y = 4. Click here to see answer by jim_thompson5910(29613)

 Question 750882: Choose the equation of the line passing through the point (4,5) and perpendicular to y=1/4x+9 Click here to see answer by jim_thompson5910(29613)

 Question 750888: find a third degree equation that has a solution set of (4,5,-8) Click here to see answer by jim_thompson5910(29613)

 Question 750887: write the equation of the line passing through the points (8,-39) and (1,3) Click here to see answer by jim_thompson5910(29613)
 Question 750887: write the equation of the line passing through the points (8,-39) and (1,3) Click here to see answer by stanbon(60771)

 Question 750885: write the equation of the line passing through the points (5,-2) and (9,-2) Click here to see answer by jim_thompson5910(29613)

 Question 750896: An investment was worth \$2500 in 1995. By 2000 it had grown to \$3500. Let y be the value of the investment in year x, where x = 0 represents 1995. Assuming that the value of the investment increases in a linear fashion, write an equation that models the value of the investment in year x. Click here to see answer by stanbon(60771)

 Question 750908: The sum of the squares of three consecutive positive integers is 77. Find the integers. Click here to see answer by Alan3354(34677)

 Question 750966: Okay, so neither me, nor my mom, understand this question. Here is what I have tried so far. Work: Many thanks, Sarah Click here to see answer by JoeTaxpayer(186)

 Question 751304: Can someone please show me the steps to this problem. I don't understand this. Thank you. What is the average rate of change of the function f(x)=x^2 over an interval [a,b] Click here to see answer by stanbon(60771)

 Question 751374: How do i solve the following word problem? Sally and her friends are making lemonade to sell at a carnival. Sally made a strong lemonade with 50% lemon juice. Her friend Janet made hers weaker with only 25% lemon juice. They decided to compromise and make some lemonade that is 35% lemon juice. How much of the 25% lemonade must be used to make 10L at this new percentage. Click here to see answer by josmiceli(10616)

 Question 749282: Write equations for the vertical and horizontal lines passing through the point (-9,5) Click here to see answer by jim_thompson5910(29613)

 Question 749838: what is the solution of -(x + 1) - 5 > 10? Click here to see answer by jim_thompson5910(29613)

 Question 748807: Let f(x) = 5x+6 and g(x) = -2x+1. Find the value of f(-5)/g(0) Click here to see answer by jim_thompson5910(29613)

 Question 751420: use crammer's rule to solve the system of equation: 2x+y=-2 and x-2y=19 Click here to see answer by jim_thompson5910(29613)

 Question 751569: {(y=4x-7)(y=9x-8) how would you find the answer to this using the substitution method X=________ Y=________ Click here to see answer by MathLover1(7480)

 Question 751593: John is trying to drain a swimming pool. He has two pumps, but he can only use one at a time. He knows that the time a pump takes to drain the pool varies inversely with the power in watts of the pump. His old pump is a 40 watt pump, and it can drain the pool in 5 hours. How long would the job take if he uses his new 100 watt pump? Click here to see answer by Cromlix(2315)

 Question 751598: Sam bought a new fertilizer spreader for his yard. It has a dial on the handle that adjusts the flow of fertilizer. The dial setting is from 0 to 10. He has learned that if he sets the dial to 10, then one bag of fertilizer will cover only 500 square feet of his yard. The setting varies inversely with the area it will cover. How many square feet should one bag cover if the dial is set at 4? Click here to see answer by Cromlix(2315)

 Question 751600: The current (I) in an electrical conductor varies inversely as the resistance (r) of the conductor. The current is 2 amperes when the resistance is 960 ohms. What is the current when the resistance is 480 ohms? Click here to see answer by Cromlix(2315)

 Question 751531: this is my problem P = A((1+r)-n P= 20,000(1+ 0.06)-20 P = 22,000(1.06)-20 this is my question do i divide or multiply here to get my answer Click here to see answer by lwsshak3(7679)

 Question 751608: Rosa has designed a pulley system for a school science project. She has determined that as the coefficient of friction increases, the efficiency of the pulley decreases. With a coefficient of friction of 0.2, the efficiency of the pulley is 75%. What would you expect the efficiency to be if the coefficient of friction increased to 0.3? Click here to see answer by Theo(3556)