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 Linear-equations/105317: Graph the line with slope -1/3 passing through the point (-2,2) .1 solutions Answer 76674 by checkley75(3666)   on 2007-10-20 23:08:26 (Show Source): You can put this solution on YOUR website!Y=mX+b 2=(-1/3)-2+b b=2-2/3 b=4/3 THIS IS THE Y INTERCEPT. Y=-X/3+4/3 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = -x/3 +4/3).
 Numeric_Fractions/105314: Evaluate the expression for the given value of the variable. 2 3x - 6x +9 x=-21 solutions Answer 76672 by checkley75(3666)   on 2007-10-20 23:04:00 (Show Source): You can put this solution on YOUR website!3x^2-6x+9 3(-2)^2-6*-2+9 3*4+12+9 12+12+9=33 answer.
 Graphs/105312: Graph the line with slope 3 passing through the point (-3,-1) 1 solutions Answer 76670 by checkley75(3666)   on 2007-10-20 22:59:42 (Show Source): You can put this solution on YOUR website!-1=3*-3+b b=-1+9 b=8 THUS THE LINE EQUATION FOR THIS SLOPE RUNNING THROUGH (-3,-1) IS: Y=3X+8 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 3x +8).
 Numeric_Fractions/105315: 2x --- = 40 51 solutions Answer 76668 by checkley75(3666)   on 2007-10-20 22:56:24 (Show Source): You can put this solution on YOUR website!2X/5=40 CROSS MULTIPLY 2X=5*40 2X=200 X=200/2 X=100 ANSWER. PROOF 2*100/5=40 200/5=40 40=40
 Linear_Equations_And_Systems_Word_Problems/105323: Twice the sum of two numbers is 32. Twice their difference is 4. Find the numbers.1 solutions Answer 76667 by checkley75(3666)   on 2007-10-20 22:54:00 (Show Source): You can put this solution on YOUR website!2(X+Y)=32 X-Y=4 OR X=Y+4 NOW SUBSTITUTE (Y+4) FOR X IN THE OTHERE EQUATON & SOLVE FOR Y. 2(Y+4+Y)=32 2(2Y+4)=32 4Y+8=32 4Y=32-8 4Y=24 Y=24/4 Y=6 ANSWER. X-6=4 X=4=6 X=10 ANSWER. PROF 2(10+6)=32 32=32
 Human-and-algebraic-language/105336: I am thinking of a number. If you multily my number by 2 and then add 3, you will get 55. What is my number?1 solutions Answer 76665 by checkley75(3666)   on 2007-10-20 22:49:40 (Show Source): You can put this solution on YOUR website!2N+3=55 2N=55-3 2N=52 N=52/2 N=26 ANSWER FOR YOUR NUMBER. PROOF 2*26+3=55 52+3=55 55=55
 Human-and-algebraic-language/105337: 1 solutions Answer 76663 by checkley75(3666)   on 2007-10-20 22:47:07 (Show Source): You can put this solution on YOUR website!(N+3)/8=-9 CROSS MULTIPLY N+3=-9*8 N+3=-72 N=-72-3 N=-75 ANSWER. PROOF (-75+3)/8=-9 -72/8=-9 -9=-9
 Human-and-algebraic-language/105338: The weight of the truck is two times the weight of the car1 solutions Answer 76662 by checkley75(3666)   on 2007-10-20 22:43:53 (Show Source): You can put this solution on YOUR website!LET T BE THE WEIGHT OF THE TRUCK & LET C BE THE WEIGHT OF THE CAR. THEN T=2C
 Graphs/105339: Write the equation of the line which passes through the point (2,1) and is parallel to the line with the equation y= 5/2x+61 solutions Answer 76661 by checkley75(3666)   on 2007-10-20 22:42:17 (Show Source): You can put this solution on YOUR website!Y=5X/2+6 (RED LINE) HAS A SLOPE OF 5/2 SO ANY PARALLEL LINE ALSO HAS A SLOPE OF 5/2. THUS PASSINGH THROUGH (2,1) WE NEED TO SUBSTITUTE THESE VALUES IN THE LINE EQUATION Y=mX+b & SOLVE FOR b 1=5/2*2+b b=1-5 b=-4 SO THE PARALLEL LINE EQUATION IS; Y=5X/2-4 (GREEN LINE) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = 5x/2 +6 and y = 5x/2 -4).
 Graphs/105343: Write the equation of the line passing through (-2,-6) and (4,-6)1 solutions Answer 76659 by checkley75(3666)   on 2007-10-20 22:36:33 (Show Source): You can put this solution on YOUR website!FIRST YOU NEED TO FIND THE SLOPE(m) m=(Y2-Y1)/(X2-X1) m=(-6+6)/(4+2)=0/6=0 OR THIS IS A HORIZONTAL LINE THROUGH [Y=-6] WHICH IS ALSO THE LINE EQUATION
 Quadratic_Equations/105344: 3x^2 - 4x - 7 = 0 and x2 + 5x - 6 = 0 Very confused.1 solutions Answer 76656 by checkley75(3666)   on 2007-10-20 22:32:39 (Show Source): You can put this solution on YOUR website!3X^2-4X-7=0 (3X-7)(X+1)=0 3X-7=0 3X=7 X=7/3 ANSWER. X+1=0 X=-1 ANSWER. ----------------------------------------- X^2+5X-6=0 (X+6)(X-1)=0 X+6=0 X=-6 ANSWER. X-1=0 X=1 ANSWER.
 Linear-systems/105345: sovle 5x-27=13 and check your result.1 solutions Answer 76654 by checkley75(3666)   on 2007-10-20 22:28:32 (Show Source): You can put this solution on YOUR website!5X-27=13 5X=13+27 5X=40 X=40/5 X=8 ANSWER. PROOF 5*8-27=13 40-27=13 13=13
 Human-and-algebraic-language/105340: The total cost rquals the prince of the tickets multiplied by eight people.1 solutions Answer 76653 by checkley75(3666)   on 2007-10-20 22:26:38 (Show Source): You can put this solution on YOUR website!LET T=THE PRICE OF A SINGLE TICKET. THEN 8*T=THE TOTAL PRICE OF 8 TICKETS.
 Human-and-algebraic-language/105341: 13 plus a number is twice the number1 solutions Answer 76652 by checkley75(3666)   on 2007-10-20 22:23:43 (Show Source): You can put this solution on YOUR website!13+N=2N 2N-N=13 N=13 ANSWER. PROOF 13+13=2*13 26=26
 Unit_Conversion_Word_Problems/105325: 65 miles per hour is equal to how many feet per second?1 solutions Answer 76651 by checkley75(3666)   on 2007-10-20 22:21:00 (Show Source): You can put this solution on YOUR website!65 MILES=65*5,280=343,200 FEET 1 HOUR=3,600 SECONDS NOW WE DIVIDE THESE TWO TERMS 343,200/3600=95.3333 FEET PER SECOND.
 Inequalities/105327: This question is from textbook t/p=d if p=4 and d=5 find T1 solutions Answer 76649 by checkley75(3666)   on 2007-10-20 22:12:47 (Show Source): You can put this solution on YOUR website!T/P=D T/4=5 CROSS MULTIPLY T=4*5 T=20 PROOF 20/5=4 4=4
 Linear-systems/105334: This question is from textbook when solving 5x-27=13, first____?____ to each side, then____?___ on both sides.1 solutions Answer 76648 by checkley75(3666)   on 2007-10-20 22:10:13 (Show Source): You can put this solution on YOUR website!FIRST ADD 27 TO EACH SIDE. THEN DIVIDE BOTH SIDES BY 5. 5X-27=13 5X=13+27 OR 5X=40 X=40/5 OR X=8
 Expressions-with-variables/105328: I have a question concerning substitution and elimination. Goes like this: Maria drove from Owen Sound to Ottawa, a distance of 550 km. The trip took 7 h. Maria drove at 70 km/h for part of the trip and at 85 km/h for the remainder of the trip. How far did she drive at 70 km/h? Can you please answer this detailed for me>?1 solutions Answer 76647 by checkley75(3666)   on 2007-10-20 22:06:15 (Show Source): You can put this solution on YOUR website!70T+85(7-T)=550 70T+595-85T=550 -15T=550-595 -15T=-45 T=-45/-15 T=3 HOURS DRIVEN @ 70KM/H 7-3=4 HOURS DRIVEN @ 85 KM/H PROOF 70*3+85*4=550 210+340=550 550=550
 Mixture_Word_Problems/105330: At a particular store they sell coffee for \$4 a pound, cardamon for \$35 a pound, and a coffee and cardamon mixture for \$5 a pound. Assuming no change in profit on selling the mix versus its components how much caradamon should be mixed with 10 pounds of coffee?1 solutions Answer 76646 by checkley75(3666)   on 2007-10-20 22:00:22 (Show Source): You can put this solution on YOUR website!4*10+35*X=5(10+X) 40+35X=50+5X 35X-5X=50-40 30X=10 X=10/30 X=1/3 POUND OF \$35COMPONENTS SHOULDBE USED. PROOF 4*10+35*(1/3)=5(10+1/3) 40+35/3=50+5/3 40+11 2/3=50+1 2/3 51 2/3=51 2/3
 Human-and-algebraic-language/105331: The product of 2 and a number is -241 solutions Answer 76645 by checkley75(3666)   on 2007-10-20 21:52:24 (Show Source): You can put this solution on YOUR website!2*N=-24 N=-24/2 N=-12 ANSWER FOR THE NUMBER.
 Polynomials-and-rational-expressions/105227: I could not find this one so here goes: Factor each of the following polynomials completely 24x^2 - 18x - 6 Thanks, Marco 1 solutions Answer 76596 by checkley75(3666)   on 2007-10-19 22:44:58 (Show Source): You can put this solution on YOUR website!24x^2-18x-6 6(4x^2-3x-1) 6(4x+1)(x-1)
 Linear-equations/105224: if a line passes through (5,2) and has a slope 2/3, then what is the value of y on this line when x=8, x=11, and x=12?1 solutions Answer 76595 by checkley75(3666)   on 2007-10-19 22:42:59 (Show Source): You can put this solution on YOUR website!Y=mX+b 2=2*5/3+b 2=10/3+b b=2-10/3 b=(6-10)/3 b=-4/3 Y=2X/3-4/3 IS THE LINE EQUATION WITH A SLOPEOF 2/3 & PASSING THROUGH (5,2). WHEN X=8 THEN: Y=2*8/3-4/3 Y=16/3-4/3 Y=12/3=4 ANSWER. WHEN X=11 THEN: Y=2*11/3-4/3 Y=22/3-4/3 Y=18/3=6 ANSWER. WHEN X=12 THEN: Y=2*12/3-4/2 Y=24/3-4/3 Y=20/3 ANSWER. (graph 300x200 pixels, x from -6 to 15, y from -10 to 10, y = 2x/3 -4/3).
 Quadratic_Equations/105088: Good Evening tutor, Could you tell me if I have these correct? Solve by completing the square: 1.) 4x^2 + 2x - 3 = 0 is (-1+-sqrt of 13 / 8) 2.) x^2 = 5x + 2 is (5 +- sqrt of 29 / 2) 3.) 4x^2 + x - 3 = 0 is (1, -3/4) I want to make sure I solved these correctly so any assistance is very much appreciated. Thank you in advance. 1 solutions Answer 76594 by checkley75(3666)   on 2007-10-19 22:20:53 (Show Source): You can put this solution on YOUR website!4X^2+2X-3=0 4X^2+2X=+3 4X^2+2X+1/4=3+1/4 (2X+1/2)(2X+1/2)=13/4 2X+1/2=SQRT13/4 2X=SQRT13/4-1/2 X=(SQRT13/4)/2-(1/2)/2 X=(1/2SQRT13)/2-1/4 X=1/4SQRT13-1/4 X=1/4(SQRT13-1) ANSWER. (.56 & -1.15) TO VERIFY THIS ANSWER USE THE QUADRATIC EQUATION: AND YOU'LL HAVE ANSWERS OF .56 & -1.15 -------------------------------------------------- USING THIS SAME PROCEDURE AND PROOF, SOLVE THE REMAINING PROBLEMS.
 Travel_Word_Problems/105126: Ching leaves San Francisco and travels toward Los Angeles at 50 miles/hour. An hour later, Phil leaves Los Angeles and travels toward San Francisco at 60 miles/hour. If the two cities are 380 miles apart, how many hours will it take for Ching to meet Phil?1 solutions Answer 76590 by checkley75(3666)   on 2007-10-19 21:45:55 (Show Source): You can put this solution on YOUR website!50t+60(t-1)=380 50t+60t-60=380 110t=380+60 110t=440 t=440/110 t=4 hours they will meet. proof 5*4+60*3=380 200+180=380 380=380
 Human-and-algebraic-language/105136: There are 156 concrete blocks available to make a retaining wall. The bottom three rows will all have the same number of blocks. The next six rows will each have two blocks fewer than the row below it. How many blocks are in each row?1 solutions Answer 76589 by checkley75(3666)   on 2007-10-19 21:41:32 (Show Source): You can put this solution on YOUR website!3x+x-2+x-4+x-6+x-8+x-10+x-12=156 9x-42=156 9x=156+42 9x=198 x=198/9 x=22 is the number of blocks in the first 3 rows. then you'll have: 20,18,16,14,12 & 10 in each successive row. proof 3*22+20+18+16+14+12+10=156 66+90=156 156=156
 Radicals/105149: A bugger one for me!!!!!!! Perform the indicated multiplication. Then simplify each radical expression. -9-sqrt108 __________ 31 solutions Answer 76588 by checkley75(3666)   on 2007-10-19 21:30:23 (Show Source): You can put this solution on YOUR website!(-9-sqrt108)/3 (-9-sqrt36*3)/3 (-9-6sqrt3)/3 -3-2sqrt3 answer.
 Quadratic_Equations/105195: Tutor if you could help me with this I would appreciate it. I need to find the table of values for y= -x^2 - 2x and for y = x^2 - 1. Thank you for your help. 1 solutions Answer 76587 by checkley75(3666)   on 2007-10-19 21:26:19 (Show Source): You can put this solution on YOUR website!MAYBE GRAPHING THESE 2 EQUATIONS WOULD HELP: Y=-2X^2-2X (RED CURVE) Y=X^2-1 (GREEN CURVE) (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -2x^2 -2x and y = x^2 -1). first equation: x-----y 0-----0 1---(-4) (-1)--0 3---(-24) second equation x-----y 0----(-1) 1-----0 (-1)--0 3-----8
 Systems-of-equations/105054: I need help solving this problem 3x-7=x-91 solutions Answer 76585 by checkley75(3666)   on 2007-10-19 21:14:27 (Show Source): You can put this solution on YOUR website!3X-7=X-9 3X-X=7-9 2X=-2 X=-2/2 X=-1 ANSWER. PROOF 3*-1-7=-1-9 -3-7=-10 -10=-10
 Linear_Algebra/105057: 45,500A company placed \$1,000,000 in three different accounts. It placed part in short-term notes paying 4.5% per year, twice as much in government bonds paying 5%, and the rest in utility bonds paying 4%. The income after one year was \$45,500. How much did the company place in each account?1 solutions Answer 76584 by checkley75(3666)   on 2007-10-19 21:11:15 (Show Source): You can put this solution on YOUR website!.045X+.05*2X+.04(1,000,000-3X)=45,500 .045X+.1X+40,000-.12X=45,500 .145X-.12X=45,500-40,000 .025X=5,500 X=5,500/.025 X=220,000 INVESTED IN 4.5% NOTES. 2*220,000=440,000 INVESTED IN 5% GOV. BONDS. 1,000,000-220,000-440,000=340,000 INVESTED IN UTILITY BONDS. PROOF .045*220,000+.05*440,000+.04*340,000=45,500 9,900+22,000+13,600=45,500 45,500=45,500
 Linear-systems/105117: if v=ir what does i=?1 solutions Answer 76581 by checkley75(3666)   on 2007-10-19 20:59:43 (Show Source): You can put this solution on YOUR website!V=IR THEN I=V/R
 Exponents/105217: i have been working on the problem and not figuring out where they got there answer if someone could explain it to me...... (3x+7)exponent of 2 outside of ()1 solutions Answer 76580 by checkley75(3666)   on 2007-10-19 20:57:53 (Show Source): You can put this solution on YOUR website!I DON'T TUTOR FOR PAY ON THIS SITE BUT I HAVE DONE SOME LOCAL TUTORING FOR A FEE. I'M NOT REALLY INTERESTED IN FEES BUT WILL HELP WHEN & WHEREVER I CAN. KEEP USING THIS SITE AS IT HAS MANY SMARTER MATH PEOPLE THAN I AM. GOOD LUCK!!!!!! : ) ---------------------------------------------------------------------- (3X+7)^2=(3X+7)(3X+7) OR 3X+7 3X+7 NOW MULTIPLY USING THE FOIL PROCESS. ------------------------- 9X^2+21X+21X+49 9X^2+42X+49 FOIL STANDS FOR FIRST, OUTER, INNER & LAST. THIS IS THE ORDER TO MULTIPLY SO YOU DON'T MISS NOR ANY ONE TERM TWICE. FIRST=(3X+7)(3X+7) 3X*3X=9X^2 OUTER=(3X+7)(3X+7) 3X*7=21X INNER=(3X+7)(3X+7) 7*3X=21X LAST=(3X+7)(3X+7) 7*7=49 THAT'S WHY YOU HAVE 2 (21X) TERMS DUE TO THE OUTER & THE INNER MULTIPLICATIONS.