# Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

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 Question 320057: what is the vertex and line of semmetry of f(x)=-3(x+2)^2 graph the function thanks in advance solve for x 4x^2=-9x-2 solve by completing the square x^2 + 13/2x =13 the width of a rectangle is 2ft less . the area is 15ft^2. find the lenghth and width... Click here to see answer by Fombitz(13828)

 Question 320184: I have a question that is a T/F question. Can anyone explain? Thanks in advance for your wisdom! The equations y = 3x – 6 and y = 2x + 4 are independent. True or false and why. Click here to see answer by stanbon(60771)

 Question 320202: solve by the substitution method. What is the solution of the system? 7x-9y=41 8x+46=y Click here to see answer by Fombitz(13828)

 Question 320200: the perimeter of a rectangle is 254 inches. The length exceedes the width by 74 inches. Find the length and width. Click here to see answer by rfer(13569)

 Question 320212: the perimeter of a rectangle is 150 inches. The length exceedes the width by 59 inches. Find the length and width. Click here to see answer by rfer(13569)

 Question 320204: A student makes a \$10.50 purchase at the bookstore with a \$20.00 dollar bill. The store has no bills and gives change in quaters and fifty-cent pieces. There are 30 coins in all, how many of each are there? Click here to see answer by solver91311(18785)
 Question 320204: A student makes a \$10.50 purchase at the bookstore with a \$20.00 dollar bill. The store has no bills and gives change in quaters and fifty-cent pieces. There are 30 coins in all, how many of each are there? Click here to see answer by Sunny Day(15)
 Question 320204: A student makes a \$10.50 purchase at the bookstore with a \$20.00 dollar bill. The store has no bills and gives change in quaters and fifty-cent pieces. There are 30 coins in all, how many of each are there? Click here to see answer by josmiceli(10616)

 Question 320206: soybean meal is 14% protein;cornmeal is 7% protein, how many pounds of each should be mixed together in order to get 280-lb mixture that is 11% protein? Click here to see answer by checkley77(12569)
 Question 320206: soybean meal is 14% protein;cornmeal is 7% protein, how many pounds of each should be mixed together in order to get 280-lb mixture that is 11% protein? Click here to see answer by nyc_function(2741)

 Question 320227: the line passing through (7,y) and (1,0) is parallel to the line joining (4,4) and (-2,1). Find y Click here to see answer by Fombitz(13828)

 Question 320253: using the substitution method.. what is the solution of the system? 8x+7y=31 -2x+y=17 Click here to see answer by ankor@dixie-net.com(16524)

 Question 320300: I want to see the steps in solving 2 math problems. Got them wrong on a quiz and have no idea what I am doing. 5x+6<88 2x+5=1 Click here to see answer by rfer(13569)
 Question 320300: I want to see the steps in solving 2 math problems. Got them wrong on a quiz and have no idea what I am doing. 5x+6<88 2x+5=1 Click here to see answer by stanbon(60771)

 Question 320275: f(x)= 3x+2 find the inverse function of f(x) Click here to see answer by nyc_function(2741)

 Question 320305: Investing her bonus. Donna invested her \$33,000 bonus and received a total of \$970 in interest after one year. If part of the money returned 4% and the remainder 2.25% then how much did she invest at each rate? Answer by checkley77 In this solution, where does the -1000 come from in the last line before "proof" .04X+.0225(33,000-X)=970 .04X+742.5-.0225X=970 .0175X=970-742.5 .0175X=227.5 X=227.5/.0175 X=13,000 INVESTED @ 4%. 33,000-1,000=20,000 INVESTED @ 2.25%. PROOF: .04*13,000+.0225*20,000=970 52O+450=970 970=970 Click here to see answer by Theo(3556)

 Question 320379: the everton college store paid \$1683 for an order of 45 calculators. The store paid \$11.00 for each scientific calculator. The others all graphing calculators, cost the store \$55 each. How many of each type of calculator was ordered? Click here to see answer by mananth(13127)

 Question 320381: A radio jockey played 12 commercial spots during a 1 hour radio show. Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 8 minutes, how many 30 second commercials were played that hour? How many 60 second commercials? Click here to see answer by nyc_function(2741)

 Question 320368: solve by elimination method x+7y=23 -x+6y= 16 Click here to see answer by Sunny Day(15)

 Question 320304: Determiune whether the graphs of the two equations are perpendicular? x+2y=7 2x+4y=9 Click here to see answer by Fombitz(13828)

 Question 320482: what is the solution of the following system of equations? 4y - x = 10 3y + 5x = -4 Click here to see answer by checkley77(12569)

 Question 320556: Hi--I was wondering if someone could help me with this problem? The instructions are to "Solve each system by the substitution method. Indicate whether each system is independent, inconsistent, or dependent." x=1/8y - 1 y=1/4x + 39 I'm getting very confused... Thanks in advance for your help Click here to see answer by jim_thompson5910(29613)

 Question 320576: Find an equation of the line through the pair of points. Write the equation in the form Ax+By=C (4,0) and (-8,5) Click here to see answer by jim_thompson5910(29613)

 Question 320620: Write an equation of the line containing the given point and perpendicular to the given line using the formula y=mx+b form 1. (8,9) x + 7y + 4 2. (-9,7) 3x= 2y + 9 3. (5,8) 3x + y = 2 4. (6,-6) 3x + 5y = 8 Click here to see answer by solver91311(18785)

 Question 320622: "What is the graph of the equation c= 20t+30" Click here to see answer by nyc_function(2741)

 Question 320636: I have a word problem that I am stuck on. In a triangle, the measure of the largest angle is 17 degrees more than twice the measure of the middle angle. The smallest angle is 5 degrees less than the measure of the middle angle. What are the measurments of the three angles? I cannot figure out how to write the equation and solve. Thanks! Ashleigh Click here to see answer by nerdybill(7090)
 Question 320636: I have a word problem that I am stuck on. In a triangle, the measure of the largest angle is 17 degrees more than twice the measure of the middle angle. The smallest angle is 5 degrees less than the measure of the middle angle. What are the measurments of the three angles? I cannot figure out how to write the equation and solve. Thanks! Ashleigh Click here to see answer by unlockmath(1657)

 Question 320634: y2 + y- 240 y-15 y- 15 Find the slope if it exist of the line containing the pair of points. undefined (3,7) and (4-,7) The slope m = Type an integer or a fraction, type N if the slope is Click here to see answer by solver91311(18785)

 Question 320637: In a rectangle, the perimter is 94 inches. The length of the rectangle is 5 inches less than three times the width. What is the length and width? Click here to see answer by mananth(13127)
 Question 320637: In a rectangle, the perimter is 94 inches. The length of the rectangle is 5 inches less than three times the width. What is the length and width? Click here to see answer by solver91311(18785)

 Question 320747: what is the equation of the line that has the given slope and passes through the given point .must be written in slope intercept form m=5/6,(8,6) Click here to see answer by Fombitz(13828)

 Question 320767: Find the slope of the line through the points (3,2) and (7,11). Show all steps. Thanks Click here to see answer by solver91311(18785)

 Question 320771: Can you please help me work through the following: I need to Graph the group of functions on the same coordinate system: f(x)=1/7x^2, g(x)=1/7x^2+5, s(x)=1/7x^2-7 Jerry jerry@san.rr.com Click here to see answer by Fombitz(13828)

 Question 320825: Find the slope of the graph of the linear function "g" if g(-2)=4 and g(2)=5. Thank you! :D Click here to see answer by solver91311(18785)

 Question 320824: Find the slope of the graph of the linear function "f" if f(3)=6 and f(-2)=-4 Click here to see answer by solver91311(18785)

 Question 320774: what would the equation be with these characteristics slope=-3 point=(3,5) Click here to see answer by solver91311(18785)
 Question 320774: what would the equation be with these characteristics slope=-3 point=(3,5) Click here to see answer by Alan3354(34677)

 Question 320855: need to change 3x-2y=-16 to a slope intercept form Click here to see answer by jim_thompson5910(29613)