Algebra ->  Algebra  -> Quadratic Equations and Parabolas -> Questions on Algebra: Quadratic Equation answered by real tutors!      Log On

 Ad: You enter your algebra equation or inequality - Algebrator solves it step-by-step while providing clear explanations. Free on-line demo . Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Question 366613: a punter, punts the football at the 40 yard line at the equation of y=-0.008x^2+2.5x+1. I know how to graph a linear function starting at a cirtain point, how would you graph a quadratic function from the 40 yard line? Click here to see answer by edjones(7569)

 Question 366775: The Quotient Rule for Exponents states if m,n, and x are real number x does not equal 0, then x^m/x^n= Click here to see answer by robertb(4012)

 Question 366783: What is the distance between the points where the graph of y = - 2x^2 - x + 15 crosses the x-axis? Click here to see answer by josmiceli(9697)

 Question 366786: can you tell me if these are right if not can you help me out with them please. Hint: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from the center of Earth. a. Solve the equation for r, and then solve the equation for C. Multiply both sides by r^2 to get: wr^2 = C r^2 = C/w r = sqrt[C/w] b. Suppose that an object is 160 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the Earth.) C=160*3963^2=40205744640 c. Use the value of C you found in the previous question to determine how much the object would weigh in i. Death Valley (282 feet below sea level). Distance from center = 3963 - (282/5280) = 3962.946591 miles = 20,924,358 ft w=Cr^-2 w = 1570536900*3962.946591^-2= 100.0026954 miles ii. The top of Mount McKinley (20,320 feet above sea level). 3963+ (20320/5280) = 3966.848484848485 miles 2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a. Solve this equation for h. 1.2*Sqrt (h) = D : Sqrt(h) = ; Divided both sides by 1.2 h = ; Squared both sides b. Mauna Kea in Hawaii is 13,796 feet in elevation. How far can you see to the horizon from the top of Mauna Kea? Can you see Waikiki beach, Honolulu (about 198 miles away)? Explain your answer. 13796/5280=2.6 miles D=1.2 sprt (2.6)= 1.2* Click here to see answer by stanbon(57399)

 Question 366798: The height (t) in feet above the ground, of a ball thrown into the air from the top of a building is given by the function of h(t)= -16(t-2)^2+264, where t is the number of seconds the ball has been in the air. a. From what height was the ball thrown? b. what height does the ball reach? c. when does the ball strike the ground? e. for what values of t does the function have meaning? Click here to see answer by Alan3354(30993)

 Question 366841: f(x)=1/4x^2 find the vertex and line of symmetry Click here to see answer by Alan3354(30993)

 Question 366865: find and lable the vertex and line of symmetry. Graph the function f(x)=-2(x+1)^2 Show work please Click here to see answer by ewatrrr(10682)

 Question 366861: The number of tickets sold each day for an upcoming performance of handel's Messiah is givn by N(x)=-0.4x^2+10.4x+10 where x is the number of days since the concert was first announced. When will daily sales peak and how many tickets will be sold that day? Pleas show work Thank you Click here to see answer by josmiceli(9697)

 Question 366928: If (2x-1) is a factor of f(x)=2x^3-5x^2-kx+3 find the value of k. Find the other two factors of f(x) and solve the equation f(x)=0 Click here to see answer by stanbon(57399)

 Question 366959: What is the quadratic function whose roots are 8 and -4 and whose minimum is -6? Click here to see answer by Fombitz(13828)

 Question 366982: determine what type of number the solutions are and how many solutions exist Click here to see answer by robertb(4012)
 Question 366982: determine what type of number the solutions are and how many solutions exist Click here to see answer by stanbon(57399)

 Question 366988: write a quadratic equation in the variable x havin the given numbers as solutions type the equation in standrd form, ax^2+bx+c=0 solution 2, only solution Click here to see answer by stanbon(57399)

 Question 366939: Prove if the diagonals of a paarallelogram are congruent, then the parallelogram is a rectangle. Click here to see answer by robertb(4012)

 Question 366990: write a quadratic equation in the variable x havin the given numbers as solutions type the equation in standrd form, ax^2+bx+c=0 solution 3, only solution Click here to see answer by Fombitz(13828)

 Question 366992: durin the first part of a trip a canoesit travels 64 miles at a certain speed. The conoeist treavels 22 miles on the secondo part of the trip at a speed of 5 mph slower. the total time for the trip is 4 hours what was the speed of each part of the trip. Click here to see answer by mananth(12270)

 Question 366916: a) On a 135-mile bicycle excursion, Maria averaged 5 miles per hour faster for the first 60 miles than she did for the last 75 miles. The entire trip took 8 hours. Find her rate for the first 60 miles. b) A group of students agreed that each would chip in the same amount to pay for a party that would cost \$100. Then they found 5 more students interested in the party and in sharing the expenses. This decreased the amount each had to pay by \$1. How many students were involved in the party and how much did each student have to pay? c) A 24-foot ladder resting against a house reaches a windowsill 16 feet above the ground. How far is the foot of the ladder from the foundation of the house? Express your answer to the nearest tenth of a foot. Click here to see answer by solver91311(16897)

 Question 367018: I've been working on this problem for 5 days and can't figure it out. This is the question. "A homeowner has poured a rectangular slab for a barbecue pit. The length is 3 feet more than its width. It is surrounded by a 2 foot wide flower bed. If the area covered by both is 270 square feet, find the dimensions of the barbecue area". 1. A=lw which would mean that the with is 15 and the length is 18 (18*15=270). Now if you subtract the perimeter of that, which would be 8 feet (2*4=8) that would mean that the remaining area would be 262. 2. At 51 I suck at word problems as bad as I did when I was 15 and just can not figure out how to put this in a quadratic equation. I have tried 270=(w+3)(w)-2^2 and it doesn't work. I have tried x=(w+3)(w)-2^2-270 and that doesn't work. What exactly is it that I'm doing wrong? 3. Yes, this is a homework problem and yes I have tried everything to solve it. I have read and re-read the chapter and my class notes but it just comes down to I don't understand...Please Help!!!1 Susan Lucas Click here to see answer by Fombitz(13828)
 Question 367018: I've been working on this problem for 5 days and can't figure it out. This is the question. "A homeowner has poured a rectangular slab for a barbecue pit. The length is 3 feet more than its width. It is surrounded by a 2 foot wide flower bed. If the area covered by both is 270 square feet, find the dimensions of the barbecue area". 1. A=lw which would mean that the with is 15 and the length is 18 (18*15=270). Now if you subtract the perimeter of that, which would be 8 feet (2*4=8) that would mean that the remaining area would be 262. 2. At 51 I suck at word problems as bad as I did when I was 15 and just can not figure out how to put this in a quadratic equation. I have tried 270=(w+3)(w)-2^2 and it doesn't work. I have tried x=(w+3)(w)-2^2-270 and that doesn't work. What exactly is it that I'm doing wrong? 3. Yes, this is a homework problem and yes I have tried everything to solve it. I have read and re-read the chapter and my class notes but it just comes down to I don't understand...Please Help!!!1 Susan Lucas Click here to see answer by solver91311(16897)

 Question 367047: Find the product of the roots of 2x^2 - 8x + 3 = 0. Click here to see answer by mananth(12270)

 Question 367054: The diagonal of a rectangle is 5cm & one of its side is 4 cm. Its area is? Click here to see answer by mananth(12270)

 Question 367055: If a car is travelling at a constant rate of 45 miles per hour, how many miles does it travel from 10.40a.m. to 1.00p.m of the same day? Click here to see answer by mananth(12270)

 Question 367058: If the sum of the number and the original number increased by 5 is greater than 11, which could be a possible value of the number? Click here to see answer by ewatrrr(10682)

 Question 367063: Two squares have sides p cm and (p+5) cms. The sum of their squares is 625 sq.cm. The sides of the squares are ? Click here to see answer by ewatrrr(10682)

 Question 366845: If (2x-1) is a factor of f(x)=2x^3-5x^2-kx+3 find the value of k. Find the other two factors of f(x)=0 Click here to see answer by Jk22(389)

 Question 367066: The wages of 8 men & 6 boys amount to Rs 33. If 4 men earn Rs 4.50 more than 5 boys determine the wages of each man & boy. Click here to see answer by mananth(12270)

 Question 367075: Investigate to see if (2x+5) is a factor of 2x^3-3x^2-12x+20=0 Solve the equation. Click here to see answer by Fombitz(13828)

 Question 367117: A PIECE OF WIRE 44 CM LONG IS CUT INTO TWO PARTS AND EACH PART IS BENT TO FORM A SQUARE. AF THE TOTAL ARE OF THE TWO SQUARES IS 65 CM SQUARE, FIND THE PERIMETER OF THE TWO SQUARES Click here to see answer by Theo(3464)