| Subject | Date Asked | Expert |
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| variables on both sides | 11/20/2009 | Scott A Wilson |
Q: 4(y+1)= 7(y-2) I don't get theses at all
A: The parenthises mean to multiply what is on the outside by each element in the indside. Thus, our ...
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| algebra 2 | 11/17/2009 | Richard J. Raridon |
Q: Write in exponential form: 1. ln 100 = 4.61 2. ln 1/e2 = -2 Write the equation in logarithmic form: ...
A: Here's some of your answers 1. e^4.61 = 100 3. ln(1097) = 7 ln8 -ln2 = ln4 ln7 +0.5ln9 = ln(21) ...
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| Algebre - Parabolas | 11/17/2009 | Richard J. Raridon |
Q: I need to find the vertex, the axis of symmetry and the direction in which the parabola opens and to ...
A: The easiest way to answer your questions is to plot the parabola. For y = 0, x = -3 Put in y = +/- ...
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| Variation and problem solving | 11/17/2009 | Scott A Wilson |
Q: Supose x varies directly with y and inversely with the sqare root of z. If x is 5/2 when y is 2 and ...
A: It is said that x = Ay/√z. Putting in x=5/2, y=2, and z=16 give us 5/2 = 2A*(1/√16) = ...
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| Linear Functions and Exponential Models | 11/12/2009 | David Montiel |
Q: I am having a hard time understanding how to get the linear function y=mx+b out of this table. The ...
A: Find the slope for each pair of data. For instance the first pair will be x1=1, y1=3 x2=3, y2=7 ...
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| ap calculus ab | 11/11/2009 | Richard J. Raridon |
Q: I am 16 years old and in 12th grade in high school. my problems (set 3): In Exercises 4 and 9, find ...
A: 4. sec(x)+xsec(x)tan(x) 9. -csc^2(x)/[1+cot(x)] -csc^2(x)cot(x)/[1+cot(x)]^2 11. y = -x+3+(pi) 13. ...
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| ap calculus ab | 11/11/2009 | Scott A Wilson |
Q: my problems (set 3): In Exercises 4 and 9, find dy/dx. Use your grapher to support your analysis if ...
A: 4. This is a product rule. That's y = f(x)g(x) where f(x)=x and g()=secx. The derivatives are ...
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| Enhance my understanding, please.. | 11/11/2009 | Scott A Wilson |
Q: What are extraneous solutions of an equation? And why do they sometimes occur in the process of ...
A: Extraneous solutions arise when we solve the problem by multiplying by some expression that cancels ...
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| y=mx+b | 11/10/2009 | Richard J. Raridon |
Q: how do you plot y=1/4x + 6?
A: First of all, to avoid confusion, you should write it y = (1/4)x+6 That's the equation for a ...
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| Equation of a Parabola | 11/10/2009 | Scott A Wilson |
Q: I'm not even sure how to start this. I took a stab at it but this just doesn't look right. I'm going ...
A: Take the Angle as A, the Range as R, and the Height as H. We know R = 160 = V0•cosA and H = 60 = ...
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| Equation of a Parabola | 11/9/2009 | Richard J. Raridon |
Q: I need some help trying to figure this out. I'm going back and taking a college algebra class after ...
A: For a cannon, the range R = V0^2sin(2A)/g and the height h = V0^2sin^2(A)/(2g) where V0 is the ...
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| algebra | 11/8/2009 | Scott A Wilson |
Q: Subtract and simplify if possible: 2-z/z-9 - 6z-7/9-z
A: I will assume it is really suppose to be (2-z)/(z-9) - (6z-7)/(9-z). Note that if you multiply the ...
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| factoring a polynomial | 11/8/2009 | Richard J. Raridon |
Q: I have to factor this polynomial: x^5-5x^4+8x^3-21x^2+45x Im stuck on what steps to take to factor ...
A: You can write it f(x) = x(x^4-5x^3+8x^2-21x+45) If x is a solution, then f(x) = 0. You can see ...
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| algebra | 11/8/2009 | Scott A Wilson |
Q: Solve for x: (x^2 - 5x + 5)^x^2-9x+20 =1 a) 4 and 5 b) 1 and 4 c) 1,4 and 5 d) 2 and 3 e) 1,2,3,4 ...
A: I will assume that since this is suppose to be solvable, it should really be (x^2 - 5x + ...
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| Symbol help | 11/7/2009 | Scott A Wilson |
Q: My uncle wants me to help with an algebra assignment, their all pretty easy equations, I just don't ...
A: The ^ symbol is used, for example, for 6^2 = 6*6 = 26; 5^3 = 5*5*5 = 125; 3^4 = 3*3*3*3=81. ...
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| Algebraic Fractions | 11/7/2009 | Richard J. Raridon |
Q: Good Afternoon, I'm an older working mom planning on returning to school next Spring, and I am ...
A: I'm older than you but you don't need to call me sir. Your corrected problem looks exactly like ...
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| Intermeidate Algebra | 11/6/2009 | Scott A Wilson |
Q: I am struggling a lot with a few questions here. Here they are.... I need to use factoring and the ...
A: Is the equation 7x² - 5x + 15 = 3(5-x²)? That is that same as 7x² - 5x + 15 = 15 - 3x². Adding 3x² ...
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| algebra | 11/6/2009 | Scott A Wilson |
Q: Multiply: (-4n)^2(3n^5)^2=(-4*3)^2(n*n^5)^2=24 *n^6^2 ? The exponents outside the parentheses has ...
A: The exponets apply to every term inside the parenthesis. For (-4n)^2, you get 16n^2. For (3n^5)^2, ...
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| ap calculus ab | 11/6/2009 | Scott A Wilson |
Q: my problems (set 3): 2. What is the limit of (4-x²)/(x²-1) as x approaches ∞? (A) 1, (B) 0, ...
A: There may be several question, but they won't take long to answer. 2 Divide numerator and ...
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| college algebra | 11/5/2009 | Scott A Wilson |
Q: find the intercepts of the polynominal function f(x). find the intervals for which the graph of f is ...
A: The function is x³ + 4x² - 7x - 10. The first one to try is x=1, which gives 1+4-7-10, which is -12. ...
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| college algebra | 11/5/2009 | Scott A Wilson |
Q: 1. in 1906 the fastest time for an american man to run a mile was 4 minutes and 30 seconds runners ...
A: 1. 1906, 4.5m, 1957, 4m The average is (4.5-4)/(1957-1906) = 0.5/51 = 1/102. 2. 2000 380 2005 392; ...
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| Algebra Word Problem | 11/5/2009 | Scott A Wilson |
Q: Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is ...
A: I can tell this is going to say , 'You're welcome.' Yet if you want to read on, there's more stuff ...
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| algebra | 11/5/2009 | Scott A Wilson |
Q: I am supposed to use the quadratic formula to solve this equation: x^2-5x= -10
A: To use the quadratic equation, put it in its proper form. That would be x² - 5x + 10 = 0. Thus, we ...
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| ap calculus ab | 11/4/2009 | Richard J. Raridon |
Q: I am 16 and in 12th grade in high school. my problems (set 2): For Exercises 9, 10, 11, 12, 13, 19, ...
A: 9. (1/a)[(1/b)(2x) -(2/a) +d/x^2] 10. 64x^-9 +6x^-1/2 11. 42x^-8 +2x^-1/2 12. -5x^-6 -8x^-9 13. ...
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| Algebra Word Problem | 11/4/2009 | Scott A Wilson |
Q: Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is ...
A: Since the equation we are given is C = p•a^t, the value of a needs to be less than one for the ...
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| unitary method question | 11/4/2009 | Scott A Wilson |
Q: A garrison of 2000 men has provisions for 54days. At the end of 15days a reinforcement arrives and ...
A: Since there are 2,000 men and there are 54 days of food, that means that there is enough food for ...
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| Algebra | 11/4/2009 | Scott A Wilson |
Q: Simplify Expression. How do you know when to add or subtract? Example -5x +16-8x-14+10x = -13x+2+10x ...
A: The sign in front tells you. -5x means subtract 5x. +16x means to add 16x; if in front, it would be ...
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| algebra | 11/4/2009 | Scott A Wilson |
Q: I am supposed to multiply: (v+d)(v^2-vd+d^2) I was using the FOIL method and got confused,I think. ...
A: If we do (v+d)(v^2-vd+d^2), the first term is v^3. Next we do it in pairs. We have v * (-vd) + ...
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| question | 11/3/2009 | Scott A Wilson |
Q: Please tell me how can i solve it without using any calculator: 0.456/74 85.02/3.678
A: If its a normal calculator, type 0.456, then press the division (/ or ÷), the type 74, then press =. ...
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| urgent math | 11/3/2009 | David Montiel |
Q: Hey there I have a test tomorrow nigh for Calc and I just can't seem to get the answers for these ...
A: This is too long I don't have the time to help you with everything. I will give you some hints to ...
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| Quadratic Functions | 11/3/2009 | Scott A Wilson |
Q: Gravity. A person holds a pistol straight upward and fires. The initial velocity of most bullets is ...
A: We are given that h(t) = -16t² + 1200t. To see when it hits the ground, solve for when h(t) = 0. ...
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| algebra | 11/3/2009 | Scott A Wilson |
Q: I am supposed to use rational exponents to write x^1/9 *y^1/5 *2^1/3 as a single radical expression
A: Well, the denominators of all the powers are 9, 5, and 3. Clearly 9 is divisible by itself and 3, ...
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| algebra | 11/2/2009 | Scott A Wilson |
Q: I need to find the x intercepts for the graph of the equation: y= x^2 + 3x-10
A: TO find the x intercepts, factor the function. 10 = 2*5, and 5-2=3, so the factors are (x-2)(x+5). ...
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| algebra | 11/2/2009 | Scott A Wilson |
Q: I am supposed to convert to decimal notation: 8.12 * 10^7
A: It is known that 10^7 means a 1 followed by 7 0's. Thus, 10^7 = 10,000,000 (ten million). Multipying ...
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| LCM of fractions | 11/2/2009 | Scott A Wilson |
Q: I wanted to know as to how we calculate LCM of fractions?? for example finding the LCM of 2/3 and ...
A: To determine the best denominator with fractions, determine the LCM of the denominators. The lowest ...
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| im trying to study for exam | 11/2/2009 | David Montiel |
Q: i am studying for a vetassess exam and i doing practice questionsi found on there website. i can ...
A: I'm a bit confused about the question. Do you mean A=20 - 10/Z2 ? What is Z2 ? or is it Z*2 (Z ...
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| algebra | 11/1/2009 | Scott A Wilson |
Q: I am supposed to give exact solutions to three decimal places: x^2+12x+36=4 Is it 2.000 and 6.000?
A: If you put in 2 you get 2² + 12•2 + 36, pr 4 + 24 + 36 = 64, which is not 4. It is 4³, however, but ...
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| how to solve (x + 2x^3)^4 = -1 | 10/31/2009 | David Montiel |
Q: I am stuck on how to start a calculus problem. The problem is to show why the function f(x)=(x + ...
A: I'm a little bit confused. Specifically, I don't understand what "a" is. Do you mean: "Show that ...
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| algebra | 10/30/2009 | Scott A Wilson |
Q: Solve for x: x^2 + 29 = 4x I don't know which x I am solving for, and the text book doesn't ...
A: There is an x² in the equation, which means it is a parabola. When solving parabolas, put everything ...
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| math | 10/30/2009 | Scott A Wilson |
Q: suppose you have 32 D quaters and 36 P quaters. what is the greatest number of groups you can make ...
A: It looks like this problem is asking for the greatest common divisor of 32 and 36. If the groups ...
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