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# Recent problems solved by 'MathLover1'

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Exponential-and-logarithmic-functions/750564: Write an exponential function whose graph passes through the points (0, -6) and (-2, -54)
1 solutions

Answer 456696 by MathLover1(6801)   on 2013-05-19 21:35:34 (Show Source):
You can put this solution on YOUR website!
 Solved by pluggable solver: Find the equation of line going through points hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (0, -6) and (x2, y2) = (-2, -54). Slope a is . Intercept is found from equation , or . From that, intercept b is , or . y=(24)x + (-6) Your graph:

since you can't see second point on graph above, here is another graph:

 Equations/750565: Completing the square x^2-2x-8=0 Im stuck on this thanks!1 solutions Answer 456694 by MathLover1(6801)   on 2013-05-19 21:25:22 (Show Source): You can put this solution on YOUR website! ....write as ....group
 Mixture_Word_Problems/750560: Hi, I have an online algebra course and sometimes I find it difficult to solve equations. I was wondering if someone could please help me with this problem? Thank you so much(: The question is: Which of the following parabolas match the following graph below? And then since I couldn't drag and drop the image, I think but am not sure that two points that could be used were 1 and -1.However, to be sure, you can, I believe, go to this link and it should pull up the image. http://pub.provostacademy.com/suite/repository/workspace/System%20Files/a1p3u3l2aa1.gif1 solutions Answer 456690 by MathLover1(6801)   on 2013-05-19 21:20:40 (Show Source): You can put this solution on YOUR website! you have a parabola with a vertex at origin. From the graph I can see that if => and if => , then you have
 Volume/750441: What is the volume of a square pyramid with base edges of 20 meters and a height of 30 meters?1 solutions Answer 456580 by MathLover1(6801)   on 2013-05-19 15:44:15 (Show Source): You can put this solution on YOUR website! The volume of a square-based pyramid is given by where is area of the base and is height if
 Exponential-and-logarithmic-functions/750427: How do you solve this problem: -3ex<-7? I tried to figure it out. I could only get this far > -3ex=-7ex1 solutions Answer 456571 by MathLover1(6801)   on 2013-05-19 14:53:56 (Show Source): You can put this solution on YOUR website!...switch sides to get positive values or ..........
Graphs/750423: Write an equation through the points (7,-2) and (-6,6). Thank You!
1 solutions

Answer 456566 by MathLover1(6801)   on 2013-05-19 14:39:14 (Show Source):
You can put this solution on YOUR website!
 Solved by pluggable solver: Find the equation of line going through points hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (7, -2) and (x2, y2) = (-6, 6). Slope a is . Intercept is found from equation , or . From that, intercept b is , or . y=(-0.615384615384615)x + (2.30769230769231) Your graph:

Linear-systems/750418: does 3x+7y=8 and 21y=-9x+24 have one solution, no solution or infinitly many solutions

1 solutions

Answer 456563 by MathLover1(6801)   on 2013-05-19 14:26:33 (Show Source):
You can put this solution on YOUR website!

and

____________________solve the system

 Solved by pluggable solver: Solve the System of Equations by Graphing Start with the given system of equations: In order to graph these equations, we need to solve for y for each equation. So let's solve for y on the first equation Start with the given equation Subtract from both sides Rearrange the equation Divide both sides by Break up the fraction Reduce Now lets graph (note: if you need help with graphing, check out this solver) Graph of So let's solve for y on the second equation Start with the given equation Subtract from both sides Rearrange the equation Divide both sides by Break up the fraction Reduce Now lets add the graph of to our first plot to get: Graph of (red) and (green) From the graph, we can see that the two lines are identical (one lies perfectly on top of the other) and intersect at all points of both lines. So there are an infinite number of solutions and the system is dependent.

Quadratic_Equations/750270: f(x) = -3x^2 -10x -2
What is the vertex?
Where is the symmetric point?
1 solutions

Answer 456470 by MathLover1(6801)   on 2013-05-18 21:40:05 (Show Source):
You can put this solution on YOUR website!

vertex form:

vertex: (,)
axis of symmetry:

given:
...write it in vertex form
..complete the square...recall that

 Solved by pluggable solver: Completing the Square to Get a Quadratic into Vertex Form Start with the given equation Add to both sides Factor out the leading coefficient Take half of the x coefficient to get (ie ). Now square to get (ie ) Now add and subtract this value inside the parenthesis. Doing both the addition and subtraction of does not change the equation Now factor to get Distribute Multiply Now add to both sides to isolate y Combine like terms Now the quadratic is in vertex form where , , and . Remember (h,k) is the vertex and "a" is the stretch/compression factor. Check: Notice if we graph the original equation we get: Graph of . Notice how the vertex is (,). Notice if we graph the final equation we get: Graph of . Notice how the vertex is also (,). So if these two equations were graphed on the same coordinate plane, one would overlap another perfectly. So this visually verifies our answer.

since , axis of symmetry:

here is a graph with your parabola and its axis of symmetry:

 Polynomials-and-rational-expressions/750243: 1st prob. Multiply. (n^3+8)(n-4) 2nd prob. Subtract. 5x^4 + 6x^3 - 9x^2 -(-6x^4 +x^2) __________________ 1 solutions Answer 456454 by MathLover1(6801)   on 2013-05-18 19:14:33 (Show Source): You can put this solution on YOUR website!Multiply: Subtract:
Linear-equations/750238: hello, need more help.
Find the Y-intercept and the X-intercept for the line determined by the points (1,-2) and (3,4). thank you for any help, I am looking for examples so I can start figuring this out. thanks again!
1 solutions

Answer 456453 by MathLover1(6801)   on 2013-05-18 19:04:05 (Show Source):
You can put this solution on YOUR website!

 Solved by pluggable solver: Find the equation of line going through points hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (1, -2) and (x2, y2) = (3, 4). Slope a is . Intercept is found from equation , or . From that, intercept b is , or . y=(3)x + (-5) Your graph:

since is slope-intercept form where is a slope and is a
so, is ; point (,)

: set to find

... is ; point (,)

 logarithm/750025: Express as a single logarithm and, if possible, simplify. 2/3[ln (w2 - 16) - ln(w + 4)] + ln (w + y) These are the possible answers: 1) ln (w - 4)2/3(w + y) 2) ln (w - 4)2/3(w - y) 3) ln (w - 4)(w - y) 4) ln (w + 4)2/3(w + y) Please show the steps. Thanks!1 solutions Answer 456283 by MathLover1(6801)   on 2013-05-17 23:01:13 (Show Source): You can put this solution on YOUR website! so, answer is: 1)
 Sequences-and-series/750011: Evaluate each infinite geometric series. http://assets.openstudy.com/updates/attachments/5196e052e4b0e2ba86d44a29-helperoc101-1368842331108-untitled256.png1 solutions Answer 456278 by MathLover1(6801)   on 2013-05-17 22:28:30 (Show Source): You can put this solution on YOUR website! use partial fractions if -> , then ; so, we will have
 Expressions-with-variables/749970: If x = 4 and y = 1/9 evaluate the expression a) 96(x^2y^-1/2)^-2 (x^-3 y)^-1/2 Can you please help me out? Thanks so much in advance:) Also can you please show the steps it would really help me understand better:)1 solutions Answer 456256 by MathLover1(6801)   on 2013-05-17 20:52:47 (Show Source): You can put this solution on YOUR website!If and evaluate the expression: a) .....now plug in and
 Permutations/749043: What is the value of. 4P21 solutions Answer 455760 by MathLover1(6801)   on 2013-05-15 12:48:38 (Show Source):
 Linear-systems/749059: if a+a+a=15 and is smiplified as 3a.what would h+h+h+h be?1 solutions Answer 455757 by MathLover1(6801)   on 2013-05-15 12:40:26 (Show Source): You can put this solution on YOUR website! if and is smiplified as then => what would
 Equations/748953: help me to solve it 1000-75p = 1170750/p(1-25,82/p) 1 solutions Answer 455742 by MathLover1(6801)   on 2013-05-15 11:35:44 (Show Source): You can put this solution on YOUR website! solutions: complex or
 Trigonometry-basics/748964: X Y -3 0 -2 -4 -1 -7 0 -6 1 -4 2 0 3 6 What are the zeros of this function? 1 solutions Answer 455717 by MathLover1(6801)   on 2013-05-15 09:52:44 (Show Source): You can put this solution on YOUR website! | | | | | | | | What are the zeros of this function? A value of which makes a function equal . The zeros of a function are the coordinates of the intercepts of the graph of or . so, your zeros are: | and | if => if =>
 Roman-numerals/748989: MMMMCMLXXXVII - MMMCLXII = MDCCCXXV1 solutions Answer 455715 by MathLover1(6801)   on 2013-05-15 09:40:16 (Show Source): You can put this solution on YOUR website! first you need to know that: then you need to know if you have means or if you have means , or if you have means , or if you have means , or means so, your number is:
 test/748985: What is the factor of polynomial 6x^3y^3z+12x^2y^2z^31 solutions Answer 455709 by MathLover1(6801)   on 2013-05-15 09:22:51 (Show Source): You can put this solution on YOUR website! ... factor for and is , factor for and is factor for and is factor for and is so factor out
 test/748973: I never received a answer for this problem -7x+11<9x-211 solutions Answer 455705 by MathLover1(6801)   on 2013-05-15 08:55:55 (Show Source): You can put this solution on YOUR website! ....add to both sides .....add to both sides or
 Rational-functions/748978: please help me solve this equation 1 solutions Answer 455704 by MathLover1(6801)   on 2013-05-15 08:49:44 (Show Source): You can put this solution on YOUR website!.....multiply both numerator and denominator by to eliminate from denominator
 Equations/748857: I am a little lost on this series. Please solve each equation by taking square roots: 3 + 7n^2 = 521 solutions Answer 455660 by MathLover1(6801)   on 2013-05-14 22:54:32 (Show Source): You can put this solution on YOUR website! solutions: => or =>
 Polynomials-and-rational-expressions/748858: (2b+4)^2=?1 solutions Answer 455659 by MathLover1(6801)   on 2013-05-14 22:49:26 (Show Source):
Linear-equations/748861: Write the equation for a line with a y-intercept equal to (0,-5) and a slope equal to2/3.

1 solutions

Answer 455658 by MathLover1(6801)   on 2013-05-14 22:46:37 (Show Source):
You can put this solution on YOUR website!
 Solved by pluggable solver: Find the equation of the line(with graph)---slope a nd y-intercept:given Using the slope-intercept form, where m=slope, b=y-intercept, and, substituting the values m=2/3 and b=-5, And the general equation is,

 Exponents/748834: I just can't figure out this homework problem. Here it is The numerator is the following (2.7π(2.5x10^4)^3) The denominator is 5^ -3 and the entire formula is in brackets to the power of 2 I'm going to write it in words because the preview looks a little off. The numerator is (2.7 times Pi(2.5 times ten to the 4th)3rd power) The denominator is 5 to the negative 3rd power. The entire fraction is squared I keep coming up with "in scientific notation" 2.8x10^30 and the answer should be 2.7x10^32 Thanks for any help1 solutions Answer 455656 by MathLover1(6801)   on 2013-05-14 22:12:35 (Show Source): You can put this solution on YOUR website! ............ so, your solution is correct
 Equations/748772: 12d-9=15d+9 What does D equal?1 solutions Answer 455634 by MathLover1(6801)   on 2013-05-14 19:27:24 (Show Source):
 Polynomials-and-rational-expressions/748768: Factor this expression 5x^2- 7x - 61 solutions Answer 455632 by MathLover1(6801)   on 2013-05-14 19:25:36 (Show Source): You can put this solution on YOUR website! ....write as ....group
 test/748761: 4x-9>8x+111 solutions Answer 455630 by MathLover1(6801)   on 2013-05-14 19:20:49 (Show Source): You can put this solution on YOUR website! or
 logarithm/748766: can ypu please help me with the equation 1+log base6 (r-5)=11 solutions Answer 455628 by MathLover1(6801)   on 2013-05-14 19:18:35 (Show Source): You can put this solution on YOUR website! ...........since , substitute it ...if so, then
 Travel_Word_Problems/748720: solve for d and write the equation c=b/d1 solutions Answer 455603 by MathLover1(6801)   on 2013-05-14 17:39:08 (Show Source):
Linear-systems/748673: What is the equation of the line that passes through (5, -2) and (-3, 4)?
1 solutions

Answer 455598 by MathLover1(6801)   on 2013-05-14 17:26:06 (Show Source):
You can put this solution on YOUR website!
 Solved by pluggable solver: Find the equation of line going through points hahaWe are trying to find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (5, -2) and (x2, y2) = (-3, 4). Slope a is . Intercept is found from equation , or . From that, intercept b is , or . y=(-0.75)x + (1.75) Your graph: