WyzAnt Answershttps://www.wyzant.com/resources/answers/questions?f=new-answersAsk questions and get free answers from professional tutorsTue, 04 Aug 2015 03:38:01 -0500https://www.wyzant.com/images/WyzAnt_white200.gifWyzAnt Answershttps://www.wyzant.com/resources/answers/questions?f=new-answershttps://www.wyzant.com/resources/answers/questions?f=new-answers370181https://www.wyzant.com/resources/answers/131753/if_a_9_629_and_a_8_17b_what_is_the_value_of_2abSabah from Cherry Hill, NJhttps://www.wyzant.com/resources/answers/users/view/85901802SAT MathIf a^9=629 and a^8=17b, what is the value of 2ab?<div>This is a Sat Math question and I need help in how they got the answer. The answer is 74. Thanks in advance.</div>Tue, 04 Aug 2015 00:19:41 -05002015-08-04T00:19:41-05:00370167https://www.wyzant.com/resources/answers/131743/if_my_mom_was_born_december_10_1963_and_i_was_born_january_18_1993_how_old_was_my_mother_when_she_gave_birth_to_meCandace from Holdingford, MNhttps://www.wyzant.com/resources/answers/users/view/85901759Age ProblemIf my mom was born December 10, 1963 and I was born January 18, 1993 how old was my mother when she gave birth to me<div>Age problem birthday calendar year</div>Mon, 03 Aug 2015 23:09:19 -05002015-08-03T23:09:19-05:00370114https://www.wyzant.com/resources/answers/131691/the_successor_of_a_certain_number_when_added_to_twice_the_number_produces_61_what_is_the_number_if_n_represents_the_number_which_equation_could_be_used_to_sIcer from Burrel, CAhttps://www.wyzant.com/resources/answers/users/view/85901386Math Word Problem Math HelpThe successor of a certain number when added to twice the number produces 61. What is the number? If n represents the number, which equation could be used to s<div>The successor of a certain number when added to twice the number produces 61. What is the number?<br /><br />If n represents the number, which equation could be used to solve for n?<br /><br />A. 2n + n = 61</div>
<div><br />B. 2n + n + 1 = 61</div>
<div><br />C. n + 2(n + 1) = 61</div>Mon, 03 Aug 2015 19:02:28 -05002015-08-03T19:02:28-05:00370124https://www.wyzant.com/resources/answers/131705/i_did_a_survey_1_5_being_the_best_how_do_i_calculate_it_to_a_numberMichele from Trumbull, CThttps://www.wyzant.com/resources/answers/users/view/85901496Survey Number NeededI did a survey 1-5 being the best how do I calculate it to a number <div>I did a survey for work 5 people where involved I want to come to a number. I used 1-5, 5 being the best how do I equate it into a number?</div>Mon, 03 Aug 2015 19:56:46 -05002015-08-03T19:56:46-05:00370136https://www.wyzant.com/resources/answers/131723/which_of_the_following_occurs_when_a_few_drops_of_hno3_are_now_added_to_this_systemMathalina from Louisville, KYhttps://www.wyzant.com/resources/answers/users/view/6303329Acid-base ReactionsAcid BaseChemistryChemical ReactionsWhich of the following occurs when a few drops of HNO3 are now added to this system? <div>2 H+(aq) + 2 CrO4 -2(aq)(yellow) ->Cr2O7 -2(aq) + H2 O (orange)</div>
<div>If a few drops of Pb(NO3 )2 solution are added to the equilibrium below, a yellow precipitate of PbCrO4(s) forms.</div>
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<div>1) A ppt. of Cr(NO3 )2 forms. <br />2) A ppt. of Pb(NO3 )2 forms. <br />3) More PbCrO4 forms. <br />4) Solution turns yellow.(s) dissolves.<br />5) Some PbCrO4(s) dissolves.</div>
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<div>I don't know how to solve this.</div>Mon, 03 Aug 2015 20:46:43 -05002015-08-03T20:46:43-05:00370163https://www.wyzant.com/resources/answers/131739/the_balanced_equation_for_the_reaction_between_sodium_oxide_and_water_isMathalina from Louisville, KYhttps://www.wyzant.com/resources/answers/users/view/6303329ChemistryChemical ReactionsAcid-base ReactionsAcid BaseThe balanced equation for the reaction between sodium oxide and water is<div><br /> A. Na2O + H2O → 2NaOH<br /> B. Na2O + H2O → 2NaH + O2<br /> C. Na2O + H2O → 2Na + H2O2<br /> D. Na2O + H2O → 2Na + H2 +O2 </div>
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<div>How do I know which reaction will occur?</div>Mon, 03 Aug 2015 22:46:30 -05002015-08-03T22:46:30-05:00370128https://www.wyzant.com/resources/answers/131709/factor_the_polynomial_a_4_4a_3b_5b_2b_2Vivian from Arkadelphia, ARhttps://www.wyzant.com/resources/answers/users/view/85866763Simplifying Expressionsfactor the polynomial a^4+4a^3b-5b^2b^2 <div>1. simplify the expression. use positive exponent. Assume variable represent non zero real number (-9)(-9)^4(-9)(-9)(-9)^2</div>
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<div>2.Divide (15x^2-11x^2-22x-6) divide (-5x-3)</div>
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<div>3. factor the polynomial a^4+4a^3b-5b^2b^2 </div>Mon, 03 Aug 2015 20:20:30 -05002015-08-03T20:20:30-05:00370117https://www.wyzant.com/resources/answers/131697/7_i_have_200_ml_of_a_solution_of_40_alcohol_in_water_how_much_alcohol_must_i_add_to_make_the_solution_60_alcoholAna from Freeport, NYhttps://www.wyzant.com/resources/answers/users/view/85901431Mixture Problems7. I have 200 ml of a solution of 40% alcohol in water. How much alcohol must I add to make the solution 60% alcohol?<div>7. I have 200 ml of a solution of 40% alcohol in water. How much alcohol must I add to make the solution 60% alcohol?</div>Mon, 03 Aug 2015 19:09:16 -05002015-08-03T19:09:16-05:00370164https://www.wyzant.com/resources/answers/131741/simplify_the_complex_fraction_r_2_1_r_1Rfrdcx from Urbana, ILhttps://www.wyzant.com/resources/answers/users/view/85901741Algebra 2 Questionsimplify the complex fraction: r^-2+1/r-1<div> Do I have to do anything to the r-1? or can I just divide it with the numerator (which would be: r^2+1)</div>Mon, 03 Aug 2015 22:53:35 -05002015-08-03T22:53:35-05:00370154https://www.wyzant.com/resources/answers/131737/m_8_2_1_half_m_2Rosalina from Ashburn, VAhttps://www.wyzant.com/resources/answers/users/view/85901681Alegrbra 4m-8-2=1 half (m-2)<div>m-8-2= 1 half (m-2)</div>Mon, 03 Aug 2015 22:03:21 -05002015-08-03T22:03:21-05:00370120https://www.wyzant.com/resources/answers/131699/a_circular_rug_comes_in_two_sizes_in_one_the_diameter_is_41_inchesStephanie from Suncook, NHhttps://www.wyzant.com/resources/answers/users/view/85901449Geometrya circular rug comes in two sizes. In one, the diameter is 41 inches<div>a circular rug comes in two sizes. In one, the diameter is 41 inches, and in the other only 32 inches. If the smaller rug sells for $69.75 and the prices are proportional to the area, find the selling price of the larger rug</div>Mon, 03 Aug 2015 19:25:25 -05002015-08-03T19:25:25-05:00370129https://www.wyzant.com/resources/answers/131711/trigonometryDija from Cincinnati, OHhttps://www.wyzant.com/resources/answers/users/view/85614209TrigonometryTrigonometry<div>1. find sin(5π/12) exactly</div>
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<div>2. find sin π/8 exactly</div>
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<div>3. given that tan Θ= -3/4 and Θ is in quadrant II, find each of the following: cos 2Θ</div>Mon, 03 Aug 2015 20:24:49 -05002015-08-03T20:24:49-05:00370141https://www.wyzant.com/resources/answers/131729/list_of_all_numbers_less_than_100_with_digit_5_but_are_not_divisible_by_5Emma from Washington, DChttps://www.wyzant.com/resources/answers/users/view/85889187Divisionlist of all numbers less than 100 with digit 5 but are not divisible by 5<div>Hi expert,</div>
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<div>My question is list of all numbers less than 100 with digit 5 but are not divisible by 5</div>
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<div>And my answer is 95,85, 75, 65, 55, 45, 35, 25, 15, 55 which are all divisible by 5????</div>
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<div>Thanks</div>Mon, 03 Aug 2015 21:09:09 -05002015-08-03T21:09:09-05:00370127https://www.wyzant.com/resources/answers/131707/multiply_simplify_and_factorDija from Cincinnati, OHhttps://www.wyzant.com/resources/answers/users/view/85614209Trigonometrymultiply, simplify, and factor<div>1. Multiply and simplify: sin x(cot x- csc x)</div>
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<div>2. Factor and simplify: csc<sup>² </sup>xsec² x-csc² x</div>
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<div>3. prove the identity: cos² x+1/sin² x= 2csc² x-1</div>
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<div>4. prove the identity: tan x/csc x= sec x-cos x</div>
<div> </div>Mon, 03 Aug 2015 20:17:26 -05002015-08-03T20:17:26-05:00370153https://www.wyzant.com/resources/answers/131735/find_image_distanceVishal from New Brunswick, NJhttps://www.wyzant.com/resources/answers/users/view/85901656PhysicsFind image distance<div>A convex mirror (f1 = −6.30 cm) and a concave mirror (f2 = 9.50 cm) are facing each other and are separated by a distance of 24.0 cm. An object is placed between the mirrors and is 12 cm from each mirror. Consider the light from the object that reflects first from the convex mirror and then from the concave mirror. What is the distance of the image (di2) produced by the concave mirror?</div>Mon, 03 Aug 2015 21:52:11 -05002015-08-03T21:52:11-05:00370115https://www.wyzant.com/resources/answers/131693/the_capacities_of_two_trucks_are_3_tons_and_4_tons_respectively_if_the_smaller_truck_makes_18_more_trips_than_the_larger_it_can_deliver_12_more_tons_of_freighIcer from Burrel, CAhttps://www.wyzant.com/resources/answers/users/view/85901386Math Word Problem Math HelpThe capacities of two trucks are 3 tons and 4 tons respectively. If the smaller truck makes 18 more trips than the larger, it can deliver 12 more tons of freigh<div>The capacities of two trucks are 3 tons and 4 tons respectively. If the smaller truck makes 18 more trips than the larger, it can deliver 12 more tons of freight than the larger. How many trips does each truck make?<br /><br />Let x represent the number of trips that the larger truck makes. Which of the following equations could be used to solve the problem?<br /><br />A. 4x - 3(x + 18) = 12</div>
<div><br />B. 3(x + 18) - 4x = 12</div>
<div><br />C. 3x - 4(x + 18) = 12</div>Mon, 03 Aug 2015 19:03:24 -05002015-08-03T19:03:24-05:00370133https://www.wyzant.com/resources/answers/131719/lowering_powersDija from Cincinnati, OHhttps://www.wyzant.com/resources/answers/users/view/85614209Trigonometriclowering powers<div>1. Find sin 2x, cos 2x, and tan 2x from the given information.</div>
<div> 3 sin x=5/13 x is in Quadrant I</div>
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<div>2. Use the formulas for lowering powers to rewrite the expression in terms of the ?rst power of cosine</div>
<div> sin^4 x</div>Mon, 03 Aug 2015 20:36:52 -05002015-08-03T20:36:52-05:00370095https://www.wyzant.com/resources/answers/131669/probability_questionGina from Philadelphia, PAhttps://www.wyzant.com/resources/answers/users/view/85471325Probability & StatisticsProbability question<div>An exam has 39 questions on it and students need to answer 26 of the questions. In how many ways can this be done if the first 5 questions and exactly 6 of the last 8 questions must be answered and questions #13 and #20 must not be answered because of typos?</div>Mon, 03 Aug 2015 18:09:47 -05002015-08-03T18:09:47-05:00370130https://www.wyzant.com/resources/answers/131713/solve_for_sin_cos_and_tanDija from Cincinnati, OHhttps://www.wyzant.com/resources/answers/users/view/85614209TrigonometrySolve for sin, cos, and tan<div>1. Solve: 2 sin x =-1</div>
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<div>2. Solve: 4cos² x=1</div>
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<div>3. Solve: 3 tan x= √3</div>Mon, 03 Aug 2015 20:28:11 -05002015-08-03T20:28:11-05:00370134https://www.wyzant.com/resources/answers/131721/you_buy_9_gallons_of_gas_for_22_41_what_is_the_cost_per_gallonDom from Cleveland, OHhttps://www.wyzant.com/resources/answers/users/view/85901556SjhASasyou buy 9 gallons of gas for $22.41. what is the cost per gallon<div>ASJDHASHLajhlKSHlaksjhlaKSHlasjhlASJlasjaSHaljkshakJSHlakjshlakJSakjslkaS</div>Mon, 03 Aug 2015 20:37:02 -05002015-08-03T20:37:02-05:00