# Questions on Algebra: Quadratic Equation answered by real tutors!

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 Quadratics: solvers Practice! Answers archive Lessons Word Problems In Depth

 Question 193115: jack mows the lawn in 7 hours and susie can mow the same lawn in 4 hours, how long would it take them to mow that lawn together? Click here to see answer by Alan3354(30993)
 Question 193115: jack mows the lawn in 7 hours and susie can mow the same lawn in 4 hours, how long would it take them to mow that lawn together? Click here to see answer by RAY100(1637)

 Question 193133: Solve z^2+z=5 Click here to see answer by jim_thompson5910(28598)

 Question 192999: Polynomial (b) Is there another way to factor this trinomal? Explaing. Please help me i dont undestand this question..thanks you Click here to see answer by Mathtut(3670)

 Question 193342: We're doing Translation. It asks What happens to the vertex in the following equations as they are translated? A) y= |x| changes to y=|x+2| I entered it into my graphing calculatorl, but how do I set it up into the question? Click here to see answer by RAY100(1637)

 Question 193345: I have a problem that states to ADD THE PROPER CONSTANT TO EACH BINOMIAL SO THAT THE RESULTING TRINOMIAL IS A PERFECT SQUARE TRINOMIAL. THEN FACTOR EACH TRINOMIAL. x^2-18x+____ How would you solve this? any help would be greatly appreciated!! Click here to see answer by Mathtut(3670)
 Question 193345: I have a problem that states to ADD THE PROPER CONSTANT TO EACH BINOMIAL SO THAT THE RESULTING TRINOMIAL IS A PERFECT SQUARE TRINOMIAL. THEN FACTOR EACH TRINOMIAL. x^2-18x+____ How would you solve this? any help would be greatly appreciated!! Click here to see answer by RAY100(1637)

 Question 193340: Please check my work, Thanks. Assignment 2: Quadratic Equations Solve the following question on quadratic equations Write three quadratic equations, with a, b, and c (coefficients of x2, x, and the constant) as: 1. Integers 2x^2 -3x + 4 =0 2. Rational numbers other than integers. (Integers will not count for this one.) (1/2)x^2 +(3/5)x + (1/7) = 0 3. Irrational numbers √2x^2 + √3x -√5 = 0 Click here to see answer by RAY100(1637)

 Question 193383: The area of a rectangular wall hanging in Elizabeth's room is 240 square inches. The width of the hanging is four inches less than twice the length. What are the dimensions of the wall hanging? Click here to see answer by yuendatlo(23)

 Question 193390: Please check my work, thank you. Exponential Functions Question 1: Do exponential functions only model phenomena that grow, or can they also model phenomena that decay? Explain what is different in the form of the function in each case. Yes, they can also model decay, for example you can use them to model the decay of radioactivity. The only difference is that there will be a negative index. Example of function for growth: y=ae^(kt) Example of function for decay: y=ae^(-kt) Question 2: A Cell divides into two identical copies every 4 minutes. How many cells will exist after 5 hours? Growth formula: A(t) = A(o)(2)^(t/4) where t is number of minutes after t = 0 ------------------------------------------------------------------ A(300) = 1*2^(300/4) A(300) = 2^(75) A(300) = 3.77x10^22 cells Click here to see answer by yuendatlo(23)

 Question 193380: The area of the floor in James' rectangular storage rental locker is 144 sqaure feet. The Length of the locker is 30 feet less than six times the width. What are the dimensions of the floor? Click here to see answer by nerdybill(6963)

 Question 193440: i need some help on a word problem for quadratics-it goes like this-a model rocket is fired into the air off the top of a building. the following equation models this motion: h=-10t+26t+12 where h is the height in meters above the ground and t is the time in seconds since the launch. and now i have to answer the following questions...A. how high is the building? B. how high will the rocket be after 2.5 seconds? C. when will the rocket reach a height of 12 meters? D. how long will it take for the rocket to hit the ground? E. how long will it take to reach its maximum height? F. what is the maximum height the rocket can go? i was able to figure out B and C but i am having a little bit of trouble figuring out the rest. i do not want answers i just need a little help getting started on the others. thank you sooo much!!! Click here to see answer by Alan3354(30993)

 Question 193497: solve for R 12r+11r-5=0 Click here to see answer by checkley77(12569)

 Question 193573: Please check my work: Form each of the following: A linear equation in one variable: X + 3 = -5 A linear equation in two variables: y = 5x - 3 A quadratic equation: 3x2 + x - 2 = 0 A polynomial of three terms: 7x2y3 + 4x − 9 An exponential function: 32 = 9 A logarithmic function: log39 = 2 Click here to see answer by stanbon(57387)

 Question 193571: I'm lost, please help. Graph the following functions. Include at least 3 (x,y) points for each one. 1. f(x) = 5x 2. f(x) = 4x+2 3. f(x) = (1/3)x 4. f(x) = log5x Click here to see answer by RAY100(1637)

 Question 193575: I'm sorry. I know this problem is very similar to the example, but I get a very crazy answer when I've tried to do this like the example many times. I must be doing something wrong. Please help. One leg of a right triangle is 96 inches. Find the hypotenuse and teh other leg if the length of the hypotenuse exceeds 2 and 1/2 times teh other leg by 4 inches. Click here to see answer by nerdybill(6963)
 Question 193575: I'm sorry. I know this problem is very similar to the example, but I get a very crazy answer when I've tried to do this like the example many times. I must be doing something wrong. Please help. One leg of a right triangle is 96 inches. Find the hypotenuse and teh other leg if the length of the hypotenuse exceeds 2 and 1/2 times teh other leg by 4 inches. Click here to see answer by stanbon(57387)

 Question 193590: what is the slope of a line that is parallel to the line represnted by the equation y-2x=7? Click here to see answer by Alan3354(30993)

 Question 193593: which equation describes a vertical line that passes through the point(-2,4)? Click here to see answer by Alan3354(30993)

 Question 193592: which equation describes a horizontal line that passes through the point(7,1)? Click here to see answer by stanbon(57387)
 Question 193592: which equation describes a horizontal line that passes through the point(7,1)? Click here to see answer by Alan3354(30993)

 Question 193589: which equation represents a line that is paralle to the line represented by the equation y=3/5x+5/3? Click here to see answer by Alan3354(30993)

 Question 193591: on a scatter plot of data,a trend line passes through the points (-6,7) and (-2,10). describe the correlation. Click here to see answer by stanbon(57387)

 Question 193566: I'm stuck on this one: determine whether the following equation has a real or complex solution √2x^2 -4x-7√2=0 Click here to see answer by orca(409)

 Question 193711: Given the graph of y = ax^2 + bx + c Use the graph to determine the sign of the discriminant D, and the corresponding quadratic equation and its solutions. Thank You Click here to see answer by J2R2R(94)

 Question 193709: Translate the following into a quadratic equation, and solve it: The length of a rectangular garden is four times its width; if the area of the garden is 196 square meters, what are its dimensions? Thank You Click here to see answer by RAY100(1637)

 Question 193729: Write three quadratic equations, with a, b, and c (coefficients of x2, x, and the constant) as: Integers Rational numbers Irrational numbers Click here to see answer by user_dude2008(1861)

 Question 193731: Translate the following into a quadratic equation, and solve it: The length of a rectangular garden is four times its width; if the area of the garden is 196 square meters, what are its dimensions Click here to see answer by user_dude2008(1861)
 Question 193731: Translate the following into a quadratic equation, and solve it: The length of a rectangular garden is four times its width; if the area of the garden is 196 square meters, what are its dimensions Click here to see answer by RAY100(1637)

 Question 193753: What do you suppose is the reason the solution is complex when the discriminant is negative? Click here to see answer by stanbon(57387)

 Question 193770: whats the answer to -2x(squared)+ 0.7=-0.3 Click here to see answer by checkley77(12569)
 Question 193770: whats the answer to -2x(squared)+ 0.7=-0.3 Click here to see answer by Mathtut(3670)

 Question 193769: 4x^2 -36 y^2 factor completely Click here to see answer by Mathtut(3670)

 Question 193771: x^2-3wx +2xy-6wy factor completely Click here to see answer by Mathtut(3670)

 Question 193768: x^2 - 5x-14 Factor completely Click here to see answer by Mathtut(3670)

 Question 193766: 12x^2 - 10x -8 Factor completely Click here to see answer by Mathtut(3670)

 Question 193802: Use the discriminant to find how many places the quadratic function crosses the x-axis. 4x^2 + 8x = 0 Click here to see answer by solver91311(16897)

 Question 193810: Use the vertex form of the quadratic equation to find the vertex. y = (x-2)^2 + 4 Click here to see answer by stanbon(57387)

 Question 193790: a retailer spent \$48 to purchase a number of special mugs. Two of them were broken in the store, but by selling each of the remaining mugs for \$3 above the original cost per mug, she made a total profitt of \$22. If the price for the n mugs is \$48, how can we express the cost per mug? Now have to write in standard form of a quadratic equation Click here to see answer by solver91311(16897)

 Question 193812: Use the discriminant to find how many places the quadratic function crosses the x-axis. y = 9x2 - 24x + 16 Click here to see answer by Alan3354(30993)

 Question 193762: Can you please help me with this problem. 2(a+7)^2=34 /2 /2 (a+7)^2=17 I don't know what to do after that. I would really appreciate it if you helped. Click here to see answer by solver91311(16897)

 Question 193830: Find the height, of a ball, above ground using the following information. wait 2 seconds, initial velocity is 55 ft/sec, initial height above ground is 2 ft Question 1 answers 40 ft 42 ft 46 ft 48 ft Click here to see answer by solver91311(16897)

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