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# Recent problems solved by 'Alan3354'

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 Coordinate-system/459735: (-6, 1/2) and (-10, 1/2) the slope is M= ?1 solutions Answer 315264 by Alan3354(30993)   on 2011-06-10 15:09:36 (Show Source): You can put this solution on YOUR website!Change in y = 0 Slope = 0
 Systems-of-equations/459744: What is the value of y in the solution to the following system of equations? 5x – 3y = –11 2x – 6y = –14 1 solutions Answer 315263 by Alan3354(30993)   on 2011-06-10 15:03:42 (Show Source): You can put this solution on YOUR website!5x – 3y = –11 2x – 6y = –14 ------------ Multiply eqn 1 by 2 10x –6y = –22 2x – 6y = –14 -------------- Subtract 8x = -8 Can you finish it?
 Probability-and-statistics/459740: In a pack of 52 cards, there are 13 of each suit. What is the probability of reaching into a deck and pulling out a heart?1 solutions Answer 315259 by Alan3354(30993)   on 2011-06-10 14:53:35 (Show Source): You can put this solution on YOUR website!13/52 = 1/4
 Linear-equations/459741: Find the point of intersection on a pair of straight lines. Y=3x-15 Y=-2x+10 thanks Paola1 solutions Answer 315258 by Alan3354(30993)   on 2011-06-10 14:49:55 (Show Source): You can put this solution on YOUR website!The RHS = y for both, so set them equal to each other and find x. Then find y.
 Graphs/459691: How would I graph this inequality on a plane? y > 6x1 solutions Answer 315249 by Alan3354(30993)   on 2011-06-10 13:48:25 (Show Source): You can put this solution on YOUR website!Graph y = 6x, you get a line increasing left to right. y > 6x is the area "above" the line, not including the line.
 Functions/459713: How do I find the steps to A=Pe^rt A=1000e^(0.1*10)1 solutions Answer 315248 by Alan3354(30993)   on 2011-06-10 13:46:56 (Show Source): You can put this solution on YOUR website!Those are the steps, just sub values into the equation A =~ 2718.28
 Evaluation_Word_Problems/459720: PLEASE HELP THE OTHER ANSWER I GOT TO THIS QUESTION WAS WRONG HERES THE PROBLEM: one number is six more than the second number. Five times the first is 7 less than 4 time the second number. Find the FIRST AND SECOND NUMBER. THANK YOU SO MUCH FOR YOUR HELP ;)1 solutions Answer 315247 by Alan3354(30993)   on 2011-06-10 13:41:28 (Show Source): You can put this solution on YOUR website!one number is six more than the second number. Five times the first is 7 less than 4 time the second number. ---------------- x = y + 6 5x = 4y - 7 ------------ 5(y+6) = 4y - 7 5y + 30 = 4y - 7 y = -37 x = -31
 test/459695: C-2 over c squared + 3c1 solutions Answer 315230 by Alan3354(30993)   on 2011-06-10 12:09:27 (Show Source): You can put this solution on YOUR website!What about it?
 test/459701: Solve the equation. (x-3)(4x+3) = 0 x = Thanks, Minka1 solutions Answer 315229 by Alan3354(30993)   on 2011-06-10 12:04:05 (Show Source): You can put this solution on YOUR website!x = 3, -3/4 ??????
 Inequalities/459693: Solve the system of equations using elimination x + y = 14 -x + 3y = 6 What is the solution, type an ordered pair. Thanks, Minka1 solutions Answer 315224 by Alan3354(30993)   on 2011-06-10 11:41:14 (Show Source): You can put this solution on YOUR website!Solve the system of equations using elimination x + y = 14 -x + 3y = 6 ----------- Add 4y = 20 Can you finish it?
 Triangles/459674: Pikeville, KY (latitude 37.480 degrees north) and Alma, GA (31.530 degrees north) both lies at longitude 82.520 degrees west. How far apart are the two cities? (assume the earth has a radius of 4000 miles)1 solutions Answer 315222 by Alan3354(30993)   on 2011-06-10 11:19:13 (Show Source): You can put this solution on YOUR website!Pikeville, KY (latitude 37.480 degrees north) and Alma, GA (31.530 degrees north) both lies at longitude 82.520 degrees west. How far apart are the two cities? (assume the earth has a radius of 4000 miles) ------------------- Since the longitudes are the same, they lie on a great circle with a radius of 4000 miles. d = the circumference time the angle/360 ------------------------- d = 2*pi*4000*(37.48 - 31.53)/360 = 200*pi*5.95/9 miles =~ 415.39 miles
 Graphs/459685: Can someone should me how to graph this inequality on a plane? 3x + 4y ≤ 121 solutions Answer 315221 by Alan3354(30993)   on 2011-06-10 11:13:01 (Show Source): You can put this solution on YOUR website!dl the FREE graph software from http://www.padowan.dk --------- Use F6 and enter 3x + 4y <= 12
 Graphs/459686: Can someone should me how to graph this inequality on a plane? 6x - 5 ≤ 11x +y1 solutions Answer 315220 by Alan3354(30993)   on 2011-06-10 11:11:31 (Show Source): You can put this solution on YOUR website!dl the FREE graph software from http://www.padowan.dk --------- Use F6 and enter 6x - 5 <= 11x +y
 Triangles/459684: If im given a right triangle and two sides are 30 and 60 how do I find the hypotenuse 1 solutions Answer 315219 by Alan3354(30993)   on 2011-06-10 11:08:45 (Show Source): You can put this solution on YOUR website! Pythagorean Theorem
 Triangles/459673: if the two sides of a right triangle have lengths 8 and 3, then what is the length of the hypotenuse?1 solutions Answer 315216 by Alan3354(30993)   on 2011-06-10 10:51:01 (Show Source):
Quadratic_Equations/459676: find the value of x to 3 d.p when:
x^2 + 20x = 400cm^2
1 solutions

Answer 315215 by Alan3354(30993)   on 2011-06-10 10:46:18 (Show Source):
You can put this solution on YOUR website!
x^2 + 20x = 400cm^2
Units aren't usual in a quadratic.
x^2 + 20x - 400 = 0
 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=2000 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: 12.3606797749979, -32.3606797749979. Here's your graph:

---------
x = 12.36 cm
x = -32.36 cm
Good luck with the -32 cm

 Angles/459649: The supplement of an angle measure degree. What is the measure of the angle?1 solutions Answer 315195 by Alan3354(30993)   on 2011-06-10 09:45:40 (Show Source): You can put this solution on YOUR website!180 - some degrees.
 Graphs/459607: How do I solve this by graphing? 3x+2y=8 6x+4y=16 Thank you very much1 solutions Answer 315194 by Alan3354(30993)   on 2011-06-10 09:43:15 (Show Source): You can put this solution on YOUR website!The 2nd eqn is 2x the 1st, so they're the same line. --> infinite # of solutions, no unique solution
 Surface-area/459654: the surface area of a cube that has edge length 12 cm. if the adge length of the cube is doubled what happens to the surface area 1 solutions Answer 315192 by Alan3354(30993)   on 2011-06-10 09:36:00 (Show Source): You can put this solution on YOUR website!It's 4 times the original. -------- Area = 6s^2 2x --> 6(2s)^2 = 24s^2 -------------- PS the volume is 8 times.
 Evaluation_Word_Problems/459652: I put this problem in yesterday, I still cannot figure it out, please help x^2/3 - 5x ^1/3-= 01 solutions Answer 315191 by Alan3354(30993)   on 2011-06-10 09:29:50 (Show Source): You can put this solution on YOUR website!x^2/3 - 5x ^1/3-= 0 --------- Not sure what -= means. I'll ignore the minus sign --> x = 0 --------- x = 125
 Polynomials-and-rational-expressions/459565: Please help me solve this! Find the polynomial for the perimeter and for the area. The box is a rectangle and the long top is (n+2), the short side going up and down is n. p= a= 1 solutions Answer 315134 by Alan3354(30993)   on 2011-06-09 23:11:50 (Show Source): You can put this solution on YOUR website!I don't know what the "long top" is, or what the "short side going up and down" means.
 Points-lines-and-rays/459573: If line P contains points A (–1, 4) and B (3, –5), line q is parallel to line P and line r is perpendicular to line Q, what is the slope of line R?1 solutions Answer 315133 by Alan3354(30993)   on 2011-06-09 23:09:27 (Show Source): You can put this solution on YOUR website!The slope of line P = -9/4 Line r is perpendicular so its slope = 4/9
 Linear-systems/459557: Solve the linear system: 5x-y=7 x=-4y+161 solutions Answer 315132 by Alan3354(30993)   on 2011-06-09 23:02:45 (Show Source): You can put this solution on YOUR website!5x-y=7 x=-4y+16 --------- Sub for x in the 1st eqn 5(-4y+16) - y = 7 -20y + 80 - y = 7 -21y = -73 y = 73/21 -------------- Sub for y in the 2nd eqn
 Miscellaneous_Word_Problems/459541: The power rating P, in watts, of an electrical appliance is determined by P = I x V where I is the current, in amperes, and V is measured in volts. a) A kitchen requires 30 amps of current and the voltage in the house is 115 volts. What is the wattage of the kitchen? 1 solutions Answer 315114 by Alan3354(30993)   on 2011-06-09 21:39:30 (Show Source): You can put this solution on YOUR website!30*115 = 3450 watts
 Volume/459546: I want to make a circle 100sq ft (10x10 how many one foot long blocks would I need to cover one layer round. Sorry I did not get the circumference or diameter.1 solutions Answer 315112 by Alan3354(30993)   on 2011-06-09 21:38:23 (Show Source): You can put this solution on YOUR website!What size are the blocks? 1 ft long by what?
 Geometric_formulas/459547: a small can of soup is shaped like a right cylinder with diameter 7cm and height 12cm. a family-size can of the soup has diameter 10cm and height 15cm. which contains more soup, two small cans or one family-size can? 1 solutions Answer 315111 by Alan3354(30993)   on 2011-06-09 21:37:17 (Show Source): You can put this solution on YOUR website!repeat
 Trigonometry-basics/459554: 2SINY+COSY=?1 solutions Answer 315110 by Alan3354(30993)   on 2011-06-09 21:35:57 (Show Source): You can put this solution on YOUR website!That doesn't simplify.
 Miscellaneous_Word_Problems/459552: The weight of water 62&1/2 per cubic ft whats the weight of 17&1/9 cubic ft of water? Thank You1 solutions Answer 315109 by Alan3354(30993)   on 2011-06-09 21:35:11 (Show Source): You can put this solution on YOUR website!62 1/2 x 17 1/9 = 125/2 * 154/9 = 19250/18 pounds = 1069 4/9 pounds
 Exponential-and-logarithmic-functions/459529: Please help me with this problem, I have a test very soon..thanks! Given that log[a](3)=0.62826 and log[a](4)=0.8614, find log[a](36)1 solutions Answer 315103 by Alan3354(30993)   on 2011-06-09 20:26:47 (Show Source): You can put this solution on YOUR website!36 = 3*3*4 log(36) = log(3) + log(3) + log(4) ------------------- It wasn't asked for, but: 2.11792*ln(a) = ln(36) ln(a) = ln(36)/2.11792 a = 5.430326
 Geometry_proofs/459500: Please Help me solve this proof: Given: 2(x-3) = 8 Prove: x = 7 Statements: Reasons: 1.) 2(x-3)= 8 1.) Given1 solutions Answer 315101 by Alan3354(30993)   on 2011-06-09 20:12:28 (Show Source): You can put this solution on YOUR website!Given: 2(x-3) = 8 Prove: x = 7 ---------------- 2(x-3) = 8 x-3 = 4 x = 7 I wouldn't call that a proof. ---------------- Given: 2(x-3) = 8 Prove: x = 7 2(x-3) = 8 2(7-3) = 8 2*4 = 8 8 = 8
 Exponential-and-logarithmic-functions/459521: I need help please, I have a test soon. log4(^3sqrt4)1 solutions Answer 315100 by Alan3354(30993)   on 2011-06-09 20:09:50 (Show Source): You can put this solution on YOUR website!log4(^3sqrt4) I don't know what ^3 means.