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# Recent problems solved by 'Alan3354'

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 Radicals/549062: How would you simplify these equations? 1 solutions Answer 357446 by Alan3354(30959)   on 2011-12-19 15:12:38 (Show Source): You can put this solution on YOUR website!How would you simplify these equations? They're not equations. I can tell, there's no equal sign. ------------------------------ = = ----------------------- = Can you finish it? =======================
�t�e�s�t/549053: My daughter failed her Algebra II test, and can't seem to solve these problems.
Any help, is greatly appreciated!
Solve.
(p + 6)2 = 17
Solve.
6r2 + 24r = - 20

Determine whether there is a maximum or minimum value for the given function, and find that value.
f(x) = x2 - 12x + 39

A ball is thrown downward from a window in a tall building. Its position at time t in seconds is where s is in feet. How long (to the nearest tenth) will it take the ball to fall.

Factor:
f(x) = x2 + 2x - 120
1 solutions

Answer 357443 by Alan3354(30959)   on 2011-12-19 14:55:32 (Show Source):
You can put this solution on YOUR website!
Solve.
(p + 6)2 = 17
I think the 2 is an exponent.

p = -6 ± sqrt(17)
-----------------------
Solve.
6r2 + 24r = - 20

 Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc) Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . Discriminant d=96 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: -1.18350341907227, -2.81649658092773. Here's your graph:

--------
r = -2 ± sqrt(6)/3
----------------------
Determine whether there is a maximum or minimum value for the given function, and find that value.
f(x) = x2 - 12x + 39
The coefficient of the x^2 term is +, so it's a minimum.
--------------
Line of Symmetry is x = -b/2a
x = 12/2 = 6
f(6) = 6^2 - 12*6 + 39 = 3
Minimum at (6,3)
---------------------
A ball is thrown downward from a window in a tall building. Its position at time t in seconds is where s is in feet. How long (to the nearest tenth) will it take the ball to fall.
No numbers given.
------------------
Factor:
f(x) = x2 + 2x - 120
= (x-10)*(x+12)

 Trigonometry-basics/549055: a person standing 60 inches tall casts a shadow 87 inches long. what is the angle of elevation of the sun to the nearest degree?1 solutions Answer 357441 by Alan3354(30959)   on 2011-12-19 14:48:44 (Show Source): You can put this solution on YOUR website!a person standing 60 inches tall casts a shadow 87 inches long. what is the angle of elevation of the sun to the nearest degree? ---------- tan(A) = 60/87 A =~ 34.59 degs --> 35 degs
 Matrices-and-determiminant/549049: by elimination x – 3y + 4z = –9 2x + y + 3z = 6 x – 4y + 3z = –91 solutions Answer 357438 by Alan3354(30959)   on 2011-12-19 14:19:36 (Show Source): You can put this solution on YOUR website!Subtract Eqn 3 from Eqn 1. --> eqn in y & z Subtract 2 times Eqn 3 from Eqn 2. --> another eqn in y & z --------- 2 eqns in y & z Can you finish it?
 test/549051: I wanna know how u find the monomial factor of 50m^2n^21 solutions Answer 357436 by Alan3354(30959)   on 2011-12-19 14:17:45 (Show Source): You can put this solution on YOUR website!Find it? It's right there, you wrote it ???
 expressions/549052: X^2+14x+48 WHAT IS THE EXPRESSION IN FACTORED FORM1 solutions Answer 357435 by Alan3354(30959)   on 2011-12-19 14:15:34 (Show Source): You can put this solution on YOUR website!Hint: find 2 numbers, both positive, whose sum is 14 and product is 48.
 Polygons/549050: how many sides are there in a polyogon, if the exterior is 241 solutions Answer 357434 by Alan3354(30959)   on 2011-12-19 14:12:20 (Show Source): You can put this solution on YOUR website!360/24 = 15 sides
 Polygons/549024: The interior and exterior angle of a polygon is 2880 how many sides does it have?1 solutions Answer 357432 by Alan3354(30959)   on 2011-12-19 14:10:24 (Show Source): You can put this solution on YOUR website!The interior and exterior angle of a polygon is 2880 how many sides does it have? ----------- If you mean the sum of Int and Ext: The Ext is always 360 degs --> sum of Int angles = 2520 2520/360 = 7 7 + 2 --> 9 sides
�t�e�s�t/549034: My daughter, has been having trouble working on her homework. Currently, 12:05 am and honestly. I don't know how to do any of these questions. Any help or examples of questions are greatly appreciated! MERRY CHIRSTMAS:)
Find the complex zeros of the quadratic function.

Without solving, determine the character of the solutions of the equation.

a. two unequal real solutions
b. a repeated real solution
c. two complex solutions that are conjugates of each other

Find the x-intercept
f(x) = -x2 + 7x - 12
Find the x-intercepts.
f(x) = 2x^2 - 10x - 12
Solve.
x2 + 5 = 230
±14
15
115
±15

Without solving, determine the character of the solutions of the equation.
x2 + 7x + 6 = 0
a. a repeated real solution
b. two unequal real solutions
c. two complex solutions that are conjugates of each other
1 solutions

Answer 357427 by Alan3354(30959)   on 2011-12-19 13:55:37 (Show Source):
You can put this solution on YOUR website!
Find the complex zeros of the quadratic function.
h(x) = x2 - 12x + 45
 Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc) Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . The discriminant -36 is less than zero. That means that there are no solutions among real numbers. If you are a student of advanced school algebra and are aware about imaginary numbers, read on. In the field of imaginary numbers, the square root of -36 is + or - . The solution is , or Here's your graph:

 Problems-with-consecutive-odd-even-integers/548923: prove that product of 4 consecutive numbers cannot be the square of an integer1 solutions Answer 357400 by Alan3354(30959)   on 2011-12-19 11:46:34 (Show Source): You can put this solution on YOUR website!prove that product of 4 consecutive numbers cannot be the square of an integer -------------- (x-1)*x*(x+1)*(x+2) = n^2 If x = 0, then n^2 can be zero. o/w, ------------- To be a square, There are no integer solutions. -------------- It can be the square of an integer if one integer is zero, o/w not. eg, 0*1*2*3 = 0^2 -1*0*1*2 = 0^2
 Trigonometry-basics/548836: Find all solutions in the interval [0,2pi) for tan(x/4)= sqrt (3)/31 solutions Answer 357399 by Alan3354(30959)   on 2011-12-19 11:38:45 (Show Source): You can put this solution on YOUR website!Find all solutions in the interval [0,2pi) for tan(x/4)= sqrt (3)/3 ----------- Solutions for x, I'll assume. x/4 = pi/6 x = 2pi/3 ---------- x/4 = 7pi/6 x = 14pi/3, > 2pi ------------------- x = 2pi/3 is all
 Square-cubic-other-roots/548963: 30+28root31 solutions Answer 357398 by Alan3354(30959)   on 2011-12-19 11:35:03 (Show Source): You can put this solution on YOUR website!Do you have a question?
 Geometry_proofs/548951: in a figure, ABC is a triangle in which AB=AC.Find x° and y°.1 solutions Answer 357396 by Alan3354(30959)   on 2011-12-19 11:33:55 (Show Source): You can put this solution on YOUR website!in a figure, ABC is a triangle in which AB=AC.Find x° and y°. ------------ Not enough info.
 Probability-and-statistics/548996: I am really lost with this concept: Factorial expressions Find the value of the following: If your answer is not an integer, write it as an exact fraction.1 solutions Answer 357394 by Alan3354(30959)   on 2011-12-19 11:21:58 (Show Source): You can put this solution on YOUR website!Factorial expressions Find the value of the following: 11! 12! ------- 8! 10! ------------- 11!/10! = 11, so cancel those = 11*12!/8! ----------- 12!/8! = 12*11*10*9 --- = 11*12*11*10*9 = 130680
 Travel_Word_Problems/548993: Jenny went on a road trip to Chicago. On her trip she averaged 59 miles per hour. What was her average speed in inches per second? 1 solutions Answer 357392 by Alan3354(30959)   on 2011-12-19 11:16:03 (Show Source): You can put this solution on YOUR website! Jenny went on a road trip to Chicago. On her trip she averaged 59 miles per hour. What was her average speed in inches per second? ----------------- 59 mi/hr = 59 mi/hr * 5280 ft/mi * 12 in/ft * (1/60) hr/min * (1/60) min/sec -------------- Notice how the units cancel to give in/sec if you do it right. = 59*5280*12/(60*60) in/sec
 expressions/548807: using the #'s 6, 4,3,2,1 only once to equal 11 how to solve this equation: x ( l - s) + c \ m = 111 solutions Answer 357391 by Alan3354(30959)   on 2011-12-19 11:01:49 (Show Source): You can put this solution on YOUR website!using the #'s 6, 4,3,2,1 only once to equal 11 how to solve this equation: x ( l - s) + c \ m = 11 ------------- Solve it for what? What does c \ m mean? Is this 2 problems, or one?
 Linear-equations/548978: Need to know how to graph this problem X + 5 = 2x – 71 solutions Answer 357376 by Alan3354(30959)   on 2011-12-19 10:08:29 (Show Source): You can put this solution on YOUR website!There's no y. --------- If X is the same as x, X + 5 = 2x – 7 x = 12 ----------- For any value of y, x = 12 Makes a "vertical" line, parallel to the y-axis (if you have one) thru (12,0)
 Travel_Word_Problems/548890: linc travels downstream at a distance of 21 mph. returning he finds that the trip upstream takes 1 2/5 hours. what is the speed of the currentand the boat in still water 1 solutions Answer 357339 by Alan3354(30959)   on 2011-12-19 08:36:13 (Show Source): You can put this solution on YOUR website!linc travels downstream at a distance of 21 mph. ----------- Is 21 a distance or a speed?
 Polynomials-and-rational-expressions/548927: \$3.50 nail polish marked up to \$8.751 solutions Answer 357338 by Alan3354(30959)   on 2011-12-19 08:25:21 (Show Source): You can put this solution on YOUR website!Don't buy it.
 Travel_Word_Problems/548907: When a person drives for several hours, how does the distance traveled in one hour usually compare with the distance traveled in other hours? Explain1 solutions Answer 357272 by Alan3354(30959)   on 2011-12-18 21:32:10 (Show Source): You can put this solution on YOUR website!When a person drives for several hours, how does the distance traveled in one hour usually compare with the distance traveled in other hours? ------------ There's no relation between them.
 Travel_Word_Problems/548910: A worm travels two meters in two hours. What is its speed? 1 solutions Answer 357271 by Alan3354(30959)   on 2011-12-18 21:30:56 (Show Source): You can put this solution on YOUR website!d = r*t r = d/t
 Permutations/548886: A gym teacher has 7 sixth grade students who would like to play on the school's hockey team. In how many ways can these athletes be grouped to make up a hockey team? [Make a list]1 solutions Answer 357262 by Alan3354(30959)   on 2011-12-18 20:40:02 (Show Source): You can put this solution on YOUR website!How many will be on the team?
 Geometry_proofs/548884: Can you help me do a two colum proof of 2x+8=351 solutions Answer 357261 by Alan3354(30959)   on 2011-12-18 20:39:02 (Show Source): You can put this solution on YOUR website!It's an equation. What would you prove?
 Quadratic_Equations/548869: I need to know the discriminant of a parabola whose associated values are (-4,0(2,0)AND WHOSE VERTEX IS (-1.-9)ASAP? Please include the formula and show your work. MY E-MAIL ADDRESS IS jhami128@comcast.net1 solutions Answer 357255 by Alan3354(30959)   on 2011-12-18 20:27:02 (Show Source): You can put this solution on YOUR website!I need to know the discriminant of a parabola whose associated values are (-4,0(2,0)AND WHOSE VERTEX IS (-1.-9) --------------- The 2 zeroes are given, so (x+4)*(x-2) = 0 ---------- The discriminant = b^2 - 4ac = 36
 Numeric_Fractions/548816: 2 6 + 1 121 solutions Answer 357239 by Alan3354(30959)   on 2011-12-18 19:35:39 (Show Source): You can put this solution on YOUR website!What does that mean?
 Radicals/548834: How do you write (3/4)^5/6 as a radical?1 solutions Answer 357227 by Alan3354(30959)   on 2011-12-18 18:52:12 (Show Source): You can put this solution on YOUR website!How do you write (3/4)^5/6 as a radical? --------- = = = = =
 Geometry_Word_Problems/548797: 3.Find the perimeter of 6 regular octagons linked together as shown in the figure below, if one side is 4.5 inches. 1 solutions Answer 357226 by Alan3354(30959)   on 2011-12-18 18:39:55 (Show Source): You can put this solution on YOUR website!No figure is shown.
 Angles/548802: Can 95,40, and 45 be the degree measures of the angles of a triangle?1 solutions Answer 357225 by Alan3354(30959)   on 2011-12-18 18:38:47 (Show Source): You can put this solution on YOUR website!They can, if the sum is 180.
 Travel_Word_Problems/548814: If you traveled 80 kilometers in 2 hours, what was your average speed1 solutions Answer 357224 by Alan3354(30959)   on 2011-12-18 18:37:26 (Show Source): You can put this solution on YOUR website!d = r*t r = d/t
 Polygons/548828: Which of the following polygons has the greatest area? JUSTIFY your answer. 4cm 3cm 3cm 8cm 9cm 1 solutions Answer 357223 by Alan3354(30959)   on 2011-12-18 18:36:45 (Show Source): You can put this solution on YOUR website!What polygons?
 Travel_Word_Problems/548830: How many miles have been driven if you drove for 2 hours ?1 solutions Answer 357222 by Alan3354(30959)   on 2011-12-18 18:36:05 (Show Source): You can put this solution on YOUR website!Depends on how fast you drive.