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# Recent problems solved by 'Fombitz'

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 Graphs/345691: find the slope for a line that passes through the points (-1,6) and (4,10).1 solutions Answer 247463 by Fombitz(13828)   on 2010-09-21 09:51:54 (Show Source): You can put this solution on YOUR website! Complete the calculation for the final answer.
 Distributive-associative-commutative-properties/345697: 2(5x-1)=3(x+11)1 solutions Answer 247462 by Fombitz(13828)   on 2010-09-21 09:49:26 (Show Source): You can put this solution on YOUR website! . . . Verify, True, good solution.
 Miscellaneous_Word_Problems/345704: please help me out? The doctor wants 350mg of compazine(im). In the cabinet i have 175mg/ml. What is the correct amount to give to the patient? Could you please show me how you come up with the answer? Thank you1 solutions Answer 247460 by Fombitz(13828)   on 2010-09-21 09:47:44 (Show Source): You can put this solution on YOUR website!He wants to give 350 mg. He has 175 mg/ml. Find the number of ml to give the patient. ml . . . 2 ml of the solution contains 350 mg of compazine.
 Matrices-and-determiminant/345687: determine the equation of a line passing through the points (1,6) and (-3,-10) using matrix equation.1 solutions Answer 247459 by Fombitz(13828)   on 2010-09-21 09:46:15 (Show Source): You can put this solution on YOUR website!Which matrix equation? Typically you just calculate the slope and use the slope-intercept form or the point-slope form of a line.
 Parallelograms/345707: Find the area of the triangle with vertices A(-4,-8), B(-4,0), and C(4,-6). 1 solutions Answer 247458 by Fombitz(13828)   on 2010-09-21 09:44:17 (Show Source): You can put this solution on YOUR website! . . .
 Mixture_Word_Problems/345769: How many gallons of a 2% salt solution must be mixed with 20 gallons of a 7% solution to obtain a 4% solution? 1 solutions Answer 247456 by Fombitz(13828)   on 2010-09-21 09:40:32 (Show Source): You can put this solution on YOUR website!Let be the amount of 2% salt solution. gallons
 Distributive-associative-commutative-properties/345844: how do you rewrite 2a+4b1 solutions Answer 247454 by Fombitz(13828)   on 2010-09-21 09:39:03 (Show Source):
 Triangles/345977: if the perimeter of an isosceles triangle is 48 inches and the length of the base is 10 what is the length of one of the legs? 1 solutions Answer 247453 by Fombitz(13828)   on 2010-09-21 09:37:50 (Show Source): You can put this solution on YOUR website!The perimeter of the isoceles triangle is, inches
 Geometry_Word_Problems/346000: Suppose a wire is stretched tightly around Earth. (The radius of Earth is approximately 6400Km). Then suppose the wire is cut and its length is increased by 20 km. It is then placed back around the planet so that it is the same distance from Earth at every point. Could you walk under the wire?1 solutions Answer 247452 by Fombitz(13828)   on 2010-09-21 09:36:40 (Show Source): You can put this solution on YOUR website!Treat the Earth as a sphere. The perimeter would be the circumference of a circle with radius 6400 km. km Now if we add 20 km, km Find the radius of the circle with that perimeter, km The difference in radii is km You could easily fit yourself under that, in fact, on a cloudy day you wouldn't even see the wire.
 Polynomials-and-rational-expressions/346076: State the number of positive real zeros, negative real zeros, and imaginary zeros for g(x)=9x^3-7x^2+10-4 Thank you s much for all of your help!!!!1 solutions Answer 247449 by Fombitz(13828)   on 2010-09-21 09:31:39 (Show Source): You can put this solution on YOUR website!I assume you mean . . . . . . From the graph, there is one positive real zero, which means the remaining two roots are imaginary.
 Age_Word_Problems/345990: Frank is 27 yrs younger than his mom. In 15 years, Frank will be half as old as his mother is then. How old his Frank and his mom now?1 solutions Answer 247448 by Fombitz(13828)   on 2010-09-21 09:28:19 (Show Source): You can put this solution on YOUR website!1. In 15 years, Frank will be and his mom will be . 2. Substitute from eq. 1, . . . . . Frank is 12 and Mom is 39.
 Permutations/345979: Suppose that a shipment of 120 electronic components contains 4 defective components to determine whether the shipment should be accepted, a quality control engineer randomly selects 4 of the components and test them. If 1 or more of the components is defective, the shipment is rejected. What is the probability that the shipment is rejected?1 solutions Answer 247443 by Fombitz(13828)   on 2010-09-21 09:23:39 (Show Source): You can put this solution on YOUR website!P(Bad)=4/120=1/30 P(Good)=29/30 . . . P(all 4 Good)=P(Good)*P(Good)*P(Good)*P(Good) P(4G)= P(not 4G)= The probability of rejection is then .
 Money_Word_Problems/345984: A broker invested \$24,000 in two mutual fnds, one earning 9% annual interest and the other earning 10%. After 1 year, the combined interest income is \$2117. How much was invested at each rate?1 solutions Answer 247441 by Fombitz(13828)   on 2010-09-21 09:17:42 (Show Source): You can put this solution on YOUR website!Let be tha mount at 9%, the amount at 10%. Total amount invested: 1. Total interest received: 2. Multiply eq. 1 by (-10) and add to eq. 2, Something is wrong with your numbers because that amount is greater than the total invested amount. If the entire amount was invested at 10%, the interest would be \$2400. If the entire amount was invested at 9%, the interest would be \$2160. Your interest amount is outside of the possible range. Check your numbers and re-post.
 Word_Problems_With_Coins/346013: Jim has \$9.00 in dimes and quarters. If he has twice as many quarters as dimes, how many of each coin does he have?1 solutions Answer 247437 by Fombitz(13828)   on 2010-09-21 09:10:18 (Show Source): You can put this solution on YOUR website!Let be the number of dimes, the number of quarters. 1. 2. Substitute eq. 2 into eq. 1, Then from eq. 2,
 real-numbers/345985: 13x-7=27 and then ROund to the nearest hundreth1 solutions Answer 247435 by Fombitz(13828)   on 2010-09-21 09:07:34 (Show Source): You can put this solution on YOUR website! or approximately,
 Geometry_Word_Problems/345998: The length of a fenced rectangular garden is 6 feet longer than the width. If the length of the fence used to surround the garden is 80 feet, what are the dimensions on the garden?1 solutions Answer 247434 by Fombitz(13828)   on 2010-09-21 09:06:44 (Show Source): You can put this solution on YOUR website!For a rectangle, Substitute, feet Then, feet
 Mixture_Word_Problems/345999: How much of an alloy that is 20% copper should be mixed with 600 ounces of an alloy that is 70% copper in order to get an alloy that is 30% copper?1 solutions Answer 247433 by Fombitz(13828)   on 2010-09-21 09:04:45 (Show Source): You can put this solution on YOUR website!Let be the amount of 20% copper. ounces
 Inequalities/345997: |3z-2|+8=11 solutions Answer 247432 by Fombitz(13828)   on 2010-09-21 09:02:59 (Show Source): You can put this solution on YOUR website! No solution, for any .
 Circles/346024: P, Q and R are three points on a circle. If the ratio of arc pq:qr:pr = 3:4:5, find the measures of arc PR, QR and PS.1 solutions Answer 247430 by Fombitz(13828)   on 2010-09-21 09:00:01 (Show Source): You can put this solution on YOUR website! . . degrees degrees degrees
 Rational-functions/346049: 1 solutions Answer 247429 by Fombitz(13828)   on 2010-09-21 08:57:09 (Show Source): You can put this solution on YOUR website!Please re-post.
 Polynomials-and-rational-expressions/346037: Simplify: 2+i/l-3i Thank you so much for all of your help!!!!1 solutions Answer 247428 by Fombitz(13828)   on 2010-09-21 08:56:45 (Show Source):
 Numbers_Word_Problems/346038: make 5 odd digits that add up to 141 solutions Answer 247427 by Fombitz(13828)   on 2010-09-21 08:52:50 (Show Source): You can put this solution on YOUR website!Can't be done. . . . Odd+Odd=Even Odd+Even=Odd Even+Even=Even . . . (Odd+Odd)+(Odd+Odd)+Odd=(Even)+(Even)+Odd=Even+Odd=Odd
 Expressions-with-variables/346041: simplify : y^4 *y^3*y1 solutions Answer 247425 by Fombitz(13828)   on 2010-09-21 08:48:58 (Show Source):
 Expressions-with-variables/346045: help! rewrite without an exponent: (9/4)^2 = 16/81?1 solutions Answer 247424 by Fombitz(13828)   on 2010-09-21 08:47:59 (Show Source): You can put this solution on YOUR website!No. . . . How'd your answer get inverted?
 Linear-equations/346048: i need help on these probloms.5g+h=g,for g 1 solutions Answer 247423 by Fombitz(13828)   on 2010-09-21 08:46:48 (Show Source):
 Mixture_Word_Problems/346060: a radiator holds 12 qt of liquid. How many quarts of pure antifreeze and how many quarts of 40% antiffreeze solution must be mixed to fill the radiator with a 50% antifreeze solution?1 solutions Answer 247421 by Fombitz(13828)   on 2010-09-21 08:45:44 (Show Source): You can put this solution on YOUR website!Let be the amount of pure antifreeze and the amount of 40% solution. Total amount equation: 1. Concentration equation: 2. Multiply eq. 1 by (-2) and add to eq. 2, quarts Then from eq. 1, quarts
 Exponents-negative-and-fractional/346050: factor: 81-64v^21 solutions Answer 247419 by Fombitz(13828)   on 2010-09-21 08:38:26 (Show Source): You can put this solution on YOUR website!Recognize that the expression is the difference of two squares.
 Polynomials-and-rational-expressions/346051: Write a quadratic equation with -3/4 and 4 as its roots. write the equation in form ax^2+bx+c=0, where a, b, and c are integers. Thank you so much for all of your help!!!!1 solutions Answer 247417 by Fombitz(13828)   on 2010-09-21 08:37:09 (Show Source): You can put this solution on YOUR website!The simplest quadratic equation with these roots is, Multiply both sides by 4. Use the FOIL method to expand,
 expressions/346058: how do i solve the following problem? (3x-1)^2=751 solutions Answer 247416 by Fombitz(13828)   on 2010-09-21 08:33:57 (Show Source):
 Numbers_Word_Problems/345969: One sixth of a number minus one seventh of the same number is 1. What is the number? So far I have 1/6x-1/7x=11 solutions Answer 247382 by Fombitz(13828)   on 2010-09-20 23:04:14 (Show Source): You can put this solution on YOUR website!So far so good. Multiply both sides by to get rid of the fractions. Then solve for .