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# Recent problems solved by 'checkley75'

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 Linear_Equations_And_Systems_Word_Problems/87216: Your maximum exercise heart rate M is given by the formula M = 0.85(220-a), where "a" is your age. What is the age of someone who has a maximum exercise heart rate of 133?1 solutions Answer 63178 by checkley75(3666)   on 2007-07-04 09:07:28 (Show Source): You can put this solution on YOUR website!M=.85(220-A) 133=.85(220-A) 133=187-.85A .85A=187-133 .85A=54 A=54/.85 A=63.5
 Quadratic_Equations/87224: find the quadratic equation when one root is the square of the other1 solutions Answer 63176 by checkley75(3666)   on 2007-07-04 08:40:35 (Show Source): You can put this solution on YOUR website!x^2-6x+8 is a quadratic equation with 2 roots where 1 is the square of the other. (x-4)(x-2) x-4=0 x=4 answer x-2=0 x=2 answer 4 is the square of 2
 Equations/87141: For function y=1/x-2 Give the y values for x =-1,0,1,2,3,4. Show work Using these points, draw a curve. Show Graph1 solutions Answer 63146 by checkley75(3666)   on 2007-07-03 19:26:25 (Show Source): You can put this solution on YOUR website!X=-1 THEN Y=1/-1-2, Y=-1-2, Y=-3 X=0, THEN Y=1/0-2, Y=-2 Y=1, THEN Y=1/1-2, Y=-1 Y=2, THEN Y=1/2-2, Y=-1.5 X=3, THEN Y=1/3-2, Y=5/3 X=4, THEN Y=1/4-2, Y=-1.75 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = (1/x) -2).
 Radicals/87142: Okay, the following question has me stumped, Geometry: If the roof of a home is 7m from peak to eave and the attic space is 3m high at the peak, how long does each of the pieces of insulation need to be? (Insulation is 40cm wide rolls that are cut to fit between the rafters in the attic) Round the answer to the nearest tenth.1 solutions Answer 63145 by checkley75(3666)   on 2007-07-03 19:17:07 (Show Source): You can put this solution on YOUR website!WHAT YOU HAVE IS A RIGHT TRIANGLE WITH THE RIGHT SIDE=3M & THE HYPOTENUS IS 7M. NOW WWE NEED TO FIND THE OTHER SIDE (BASE) USING THE PYTHAGOREAN THERUM A^2+B^2=C^2 WHERE A & B ARE THE 2 SIDES & C IS THE HYPOTENUSE. 3^2+B^2=7^2 9+X^2=49 X^2=49-9 X^2=40 X=SQRT40 X=6.3M IS THE BASE MEASUREMENT.
 Expressions-with-variables/87133: The sum of three consective even integers is 114 a. Define variables for the smalles integer (36)? b. Define variables to represent the 2nd and 3rd integers (38, 40)? c. Write an equation for the sum of the tree consecutive even integers. d. Solve the equation to find the three even integers. 1 solutions Answer 63123 by checkley75(3666)   on 2007-07-03 16:28:04 (Show Source): You can put this solution on YOUR website!X+(X+2)+(X+4)=114 3X+6=114 3X=114-6 3X=108 X=108/3 X=36 ANSWER FOR THE FIRST/SMALLEST EVEN NUMBER 36=2=38 FOR THE SECOND EVEN NUMBER 36=4=40 FOR THE THIRD EVEN NUMBER PROOF 36+38+40=114 114=114
 Trigonometry-basics/87185: Determine the area of triangle ABC given the following information: A=12, B=13, C=51 solutions Answer 63122 by checkley75(3666)   on 2007-07-03 16:21:05 (Show Source): You can put this solution on YOUR website!KNOWING THAT THIS IS A RIGHT TRIANGLE: WE USE THE QUADRATIC PATHOGOREAN THEROM PROOF A^2+B^2=C^2, 12^2+5^2=13^2, 144+25-169, 169=169. NOW WE USE THE AREA FORMULA FOR A RIGHT TRIANGLE A=B/2*H (B IS THE BASE=12), HIS THE HEIGHT=5) A=12/2*5 A=6*5 A=30
 Percentage-and-ratio-word-problems/87093: Solve the following equation for A : 2A/3 = 8 + 4A 1 solutions Answer 63077 by checkley75(3666)   on 2007-07-02 21:53:25 (Show Source): You can put this solution on YOUR website!2A/3=8+4A NOW CROSS MULTIPLY 2A=3(8+4A) 2A=24+12A 2A-12A=24 -10A=24 A=24/-10 A=-2.4 PROOF 2*-2.4/3=8+4*-2.4 -4.8/3=8-9.6 -1.6=-1.6
 Coordinate-system/87120: Graft these two equations from the following: and ..1 solutions Answer 63076 by checkley75(3666)   on 2007-07-02 21:46:05 (Show Source): You can put this solution on YOUR website!3s+5g=300 set s=y & g=x we get 3y=-5x+300, y=-5x/3+300 3s+3g=1336 3y=-5x+1336, y=-5x/3+1336 (graph 300x300 pixels, x from -60 to 50, y from -100 to 100, of TWO functions y = -5x/3 =300 and y = -5x/3 +1336).
 Linear-equations/87095: Can someone explain to me how this is done? Find the slope and y-intercept. x = –5 1 solutions Answer 63061 by checkley75(3666)   on 2007-07-02 15:37:36 (Show Source): You can put this solution on YOUR website!THERE IS NO Y INTERCEPT AS THIS IS A VERTICLE LINE PASSING THROUGH THE POINT (-5,0) & THE SLOPE IS UNDEFINED (SOME USE THE TERM FOR INFINITY).
 Quadratic_Equations/86823: simplify 5sqrt6x + 4sqrt6x1 solutions Answer 63047 by checkley75(3666)   on 2007-07-02 11:12:22 (Show Source): You can put this solution on YOUR website!5SQRT6X+4SQRT6X=9SQRT6X
 Expressions-with-variables/87081: 9-2m/7=19 1 solutions Answer 63045 by checkley75(3666)   on 2007-07-02 11:07:42 (Show Source): You can put this solution on YOUR website!9-2M/7=19 -2M/7=19-9 -2M/7=10 -2M=70 M=70/-2 M=-35 PROOF 9-2*-35/7=19 9+70/7=19 9+10=19 19=19
 Equations/87024: x^-9 * x^91 solutions Answer 62993 by checkley75(3666)   on 2007-07-01 17:24:23 (Show Source): You can put this solution on YOUR website!X^-9*X^9 [X^-9=1/X^9] X^9/X^9=1 ANSWER.
 Quadratic_Equations/86795: simplify: square root of 125/square root of 5 1 solutions Answer 62992 by checkley75(3666)   on 2007-07-01 17:21:57 (Show Source): You can put this solution on YOUR website!SQRT125/SQRT5 SQRT25*5/SQRT5 5(SQRT5)/(SQRT5) NOW CANCEL OUT THE SQRT5 WE HAVE 5.
 Equations/86835: Solve. 3x – 7 = 2x + 81 solutions Answer 62991 by checkley75(3666)   on 2007-07-01 17:19:20 (Show Source): You can put this solution on YOUR website!3X-7=2X=8 3X-2X=8+7 X=15 ANSWER. PROOF 3*15-7=2*15+8 45-7=30+8 38=38
 Equations/86840: solve and check 8 – (4x – 3) = 191 solutions Answer 62990 by checkley75(3666)   on 2007-07-01 17:16:28 (Show Source): You can put this solution on YOUR website!8-(4X-3)=19 8-4X+3=19 -4X=19-8-3 -4X=8 X=8/-4 X=-2 PROOF 8-(4*-2-3)=19 8-(-8-3)=19 8-(-11)=19 8+11=19 19=19
 Quadratic_Equations/87001: This isnt a quadratic formula problem, I dont know what type of problem it is, I just really need help in it. The problem is: Simplify d^2-2d-3 d^2-10d+24 d+1 d-4 They are like that because the problem is in fraction form1 solutions Answer 62989 by checkley75(3666)   on 2007-07-01 17:09:14 (Show Source): You can put this solution on YOUR website!IF THIS IS THE FRACTION? (D^2-2D-3)/(D^2-10D+24) (D-3)(D+1)/(D-4)(D-6) YOUR ANSWER IS (D+1)/(D-4). QUESTION -- HOW DID YOU GET RID OF THE OTHER 2 TERMS (D-3)/(D-6)??????????
 Expressions-with-variables/87002: y=2x y=x=3 please give me some understanding of how to substitute variables 1 solutions Answer 62988 by checkley75(3666)   on 2007-07-01 17:03:10 (Show Source): You can put this solution on YOUR website!BELIEVE YOU HAVE 1 TOO MANY = SIGNS IN THE SECOND EQUATION. IF Y=X=3 THEN 3=2*3 3=6 NOT VALID.
 Points-lines-and-rays/87003: Please help me solve my assignment. Thank you. Points N, R and T lie in a straight line. R lies between N and T. If RT = 4/3 NT and RT = 100, find NT.1 solutions Answer 62987 by checkley75(3666)   on 2007-07-01 17:01:00 (Show Source): You can put this solution on YOUR website!RT CANNOT BE GREATER [4/3=1.333] THAN NT IF R IS BETWEEN N&T PROOF: RT=100 & RT=(4/3)NT THEN 100=(4/3)NT NT=100/(4/3) NT=100(3/4) NT=300/4 NT=75 THE ENTIRE LENGTH OF THE LINE (NT=75) CANNOT BE LONGER THAN THE PART (RT=100)
 Expressions-with-variables/87019: Find a: m over z minus b over a equals u1 solutions Answer 62986 by checkley75(3666)   on 2007-07-01 16:48:57 (Show Source): You can put this solution on YOUR website!m/z-b/a=u (ma-bz)/za=u now cross multiply zau=ma-bz now divide both sides by zu a=(ma-bz)/zu
 Permutations/87027: If someone has 6 different pairs of pants, 10 different shirts, and 5 different pair of shoes, how many different pant, shirt, and shoe outfits are possible?1 solutions Answer 62985 by checkley75(3666)   on 2007-07-01 16:45:03 (Show Source): You can put this solution on YOUR website!6*10*5=300 different combinations are possible.
 Radicals/86830: Find the perimeter of a triangle if the three sides are: square root 5 - square root 3 square root 5 + square root 3 4 thanks,1 solutions Answer 62930 by checkley75(3666)   on 2007-06-30 16:31:46 (Show Source): You can put this solution on YOUR website!sqrt5-sqrt3+sqrt5+sqrt3+4=2.236-1.732+2.236+1.732+4=4.472=4=8.472 answer.
 Quadratic_Equations/86831: Which two expressions are equivalent? Provide evidence for your answer sqrt-49,-7,-sqrt49 1 solutions Answer 62929 by checkley75(3666)   on 2007-06-30 16:28:38 (Show Source): You can put this solution on YOUR website!sqrt(-49)=7i -(sqrt49)=-7
 Money_Word_Problems/86841: solve and check A real estate agent received a 5.5% commission on the sale of a home. If the home sold for \$133,000, how much was his commission?1 solutions Answer 62928 by checkley75(3666)   on 2007-06-30 16:25:08 (Show Source): You can put this solution on YOUR website!\$133,000*.055=\$7,315 is his commission.
 Equations/86934: solve and check 8 – (4x – 3) = 191 solutions Answer 62927 by checkley75(3666)   on 2007-06-30 16:19:55 (Show Source): You can put this solution on YOUR website!8-(4x-3)=19 8-4x+3=19 -4x=19-11 -4x=8 x=8/-4 x=-2 answer.
 Travel_Word_Problems/86980: This question is from textbook Saxon, Algebra 1 The distance traveled by a car at a constant speed is directly proportional to the time spent traveling. If the car went 910 miles in 13 hours, how far will it go in 14 hours?1 solutions Answer 62926 by checkley75(3666)   on 2007-06-30 16:17:04 (Show Source): You can put this solution on YOUR website!910/13=x/14 13x=14*910 13x=12740 x=12740/13 x=980 miles covered in 14 hours @ the constant rate.
 Miscellaneous_Word_Problems/86962: Please help Write the following phrase using symbols. Use the variable x to represent the number. A number increased by by 1 1 solutions Answer 62916 by checkley75(3666)   on 2007-06-30 10:57:00 (Show Source): You can put this solution on YOUR website!Increase a number by 1. If the number is x then (x+1) represents the number increased by 1.
 Miscellaneous_Word_Problems/86968: Please help Use the properties of addition and multiplication to complete the statement. (17 + 0) + 5 = 17 + ( ____ + 5) 1 solutions Answer 62914 by checkley75(3666)   on 2007-06-30 10:55:20 (Show Source): You can put this solution on YOUR website!(17+0)+5=17+(0+5) 17+5=17+5 22=22
 Equations/86913: please solve x+(x*.05)=9471 solutions Answer 62882 by checkley75(3666)   on 2007-06-29 21:19:52 (Show Source): You can put this solution on YOUR website!x+.05x=947 1.05x=947 x=947/1.05 x=901.90476 answer. proof 901.90476+.05*901.90476=947 901.90476+45.095238=947 947=947
 Equations/86930: solve and check 80 = 10x1 solutions Answer 62881 by checkley75(3666)   on 2007-06-29 21:14:46 (Show Source): You can put this solution on YOUR website!80=10x x=80/10 x=8 proof 10*8=80 80=80
 Money_Word_Problems/86933: The perimeter of a rectangle is 34 feet and its area is 60 square feet. Find the length and width of the rectangle.1 solutions Answer 62880 by checkley75(3666)   on 2007-06-29 21:13:30 (Show Source): You can put this solution on YOUR website!xy=60 x=60/y 2x+2y=34 2(60/y)+2y=34 120/y+2y=34 (120+2y^2)/y=34 120+2y^2=34y 2y^2-34y+120=0 2(y^2-17y+60)=0 2(y-12)(y-5)=0 y-12=0 y=12 answer. the x=60/12=5 y-5=0 y=5 answer. the y=60/5=12 proof 5*12=60 60=60 2*5+2*12=34 10+24=34 34=34