Friday

July 3, 2015

July 3, 2015

Number of results: 18,794

**Math (Geometry)**

Square ABCD has M as the midpoint of AB, N as the midpoint of BC, P as the midpoint of CD and Q as the midpoint of MP. If [AMNPDQ]=20, what is the value of [ABCD]? Details and assumptions [PQRS] refers to the area of figure PQRS.
*April 29, 2013 by Bob*

**Geometry; Check answers?**

For each graph, find (a)AB to the nearest tenth and (b)the coordinates of the midpoint of AB. 1. Coordinates are A(-9, -6) B(6,6) D=19.2 Midpoint=(1.5,-6) 2.A(-2,-2) B(8,-6) D=10.77 midpoint= (3,-4) 3. A(0,3) B(-2,-2) D=5.4 Midpoint= (-1,0.5)
*August 20, 2013 by Unknown*

**Geometry **

Did I solve the following correctly? I had to the fin the midpoint. A (-3, 2) B (5, -4) I did the midpoint formula: M(-3+5/2, 2+ -4/2=M (2/2, -2/2). Is (2/2, -2/2) the correct midpoint?
*September 23, 2014 by Eva*

**Finding the midpoint**

Find the midpoint of the line segment joining the points P1 and P2 P1=(3,2) P2=(-5,7) The midpoint is=
*April 8, 2013 by Lauren*

**geometry**

in triangle GHJ, K(2,3) is the midpoint of GH, L(4,1) is the midpoint of HJ, M(6,2) is the midpoint of GJ. Find the coordinates of G, H, and J.
*December 9, 2010 by brandi*

**Gemoetry question**

B is the midpoint of line Ac AB=3x AC=7x-5 How do I find what the value of BC is? Since B is the midpoint, AB = BC 3x = 7x -5 4x = 5 x = 5/4
*August 4, 2007 by Jim*

**Maths**

In triangle ABC, D is the midpoint of AC and E is the midpoint of AB. BD and CE are perpendicular to each other and intersect at the point G. If AB=7 and AC=9, what is the value of BC^2?
*April 12, 2013 by Ian*

**Geometry**

J is the midpoint of Gk, H is the midpoint of GJ and I is the midpoint of Hj. Suppose GK=64. Find the measure of HJ
*September 22, 2008 by Alex*

**geometry**

In triangle DEF, A(2,3) is the midpoint of DE, B(4,1) is the midpoint of EF, and C(6,2) is the midpoint of DF. What are the coordinates of D, E, and F?
*December 9, 2010 by billy*

**geometry**

in triangle GHJ, k(2,3) is the midpoint of GH, l(4,1) is the midpoint of HJ and m(6,2) is the midpoint of GJ. Find the coordinates of G,H and J. can you please show me how to find this? i don't really understand how it would be done. thank you.
*November 2, 2010 by maria*

**Geometry**

Is it possible for AB = 10, BC = 2x + 5 and AC = 5x, given that point B is the midpoint? If you are talking about lengths of a line segment ABC, with B the midpoint, then AB + BC = AC 15 + 2x = 5x 3x = 15 x = 3. But also we must have AB = BC for B to be a midpoint 10 = 2x + 5 ...
*July 26, 2007 by Jim*

**Math (Geometry)**

Square ABCD has M as the midpoint of AB, N as the midpoint of BC, P as the midpoint of CD and Q as the midpoint of MP. If the area of AMNPDQ is 20, what is the area of ABCD?
*May 1, 2013 by Hale*

**finding midpoint**

the midpoint formula is x1 + x2 divided by 2, y1 + y2 divided by two. if the coordinates are x1: a, y1:b and x2: c, y2: 0, what is the midpoint? I have found the y coordinate of the midpoint to be b over 2. I found the x to be a-c over two. Is this correct? Can it be ...
*March 10, 2009 by Anonymous*

**geometry**

I have triangle ABC. Bottom is AC with midpoint F. There is a point under F called P with a little backward Z connecting F & P. A segment goes from D (midpoint of AB)to P and from E (midpoint of BC) to P. I got AD=3; BC=8 I have AF=7. I don't know how to figure out AP? Any ...
*April 16, 2015 by Jeremy*

**geometry**

Let ABC be a right triangle with ACB =90, AC =6 , and BC =2. E is the midpoint of AC , and F is the midpoint of AB . If CF and BE intersect at G , then cos(CGB), in simplest radical form, is ((k square root w)/f) where k , w , and f are positive integers. Find the value of k+w...
*March 2, 2013 by Anonymous*

**Math: is this the right answer?**

i have to find the midpoint... the two points too find the midpoint are (4,2)&(8,-6). the equation to get the answer is... x+x/2 & y+y/2......i came up with (6, -2) being the midpoint on that line; is that correct?
*September 11, 2008 by Kristin;*

**midpoint question**

find the midpoint between these points (-2,7)and (-8,-5) thank you midpoint is (sum of the x values/2,sum of the y values/2) (really you are just finding the "average" of the x's and y's.) tell me what you get.
*May 8, 2007 by cecilia lopez*

**geometry**

M is the midpoint of JK, Q is the midpoint of MK, and X is the midpoint of MQ. if a point on JK is picked at random, what is the probability that the point is on MX?
*May 1, 2013 by Nick*

**geometry**

One endpoint and the midpoint of a segment are given. Find the coordinates of the other endpoint. Show all your work. A. Endpoint: (-1,9) Midpoint: (-9,-10) Endpoint: _______ B. Endpoint: (9,-10) Midpoint: (4,8) Endpoint: ________
*September 11, 2014 by marissa*

**trig**

Find the other endpoint of the line segment with the given endpoint and mid point. 1. Endpoint:(-1, 9), midpoint: (-9, -10) 2. Endpoint: (2, 5), midpoint: (5, 1) 3. Endpoint:(9, -10), midpoint: (4, 8)
*March 28, 2012 by drew*

**Geography/Maths**

What is the difference between geographic midpoint and the midpoint calculated by halving the distance between two cities? Also, is Georaphic midpoint significantly different that the average longitutdes and latitutdes of two different locations?
*April 8, 2008 by Mikal*

**finding midpoint of a line with given interval**

my question is given the interval 2 is less than or equal to x which is less than or equal to 10; find the midpoint of a the line y = 4x+8 the midpoint x is given by x=1/2 (2+10)=6 what is y when x=6? THAT IS HARD CUZ I'M JUST IN ALGEBRA I AND WE HAVEN'T LEARNED THAT YET OR ...
*August 7, 2006 by beth*

**Geometry**

C is the midpoint of AB, D is the midpoint of AC, E is the midpoint of AD, F is the midpoint of ED, G is the midpoint of EF, and H is the midpoint of DB. If DC = 16, what is GH?
*August 26, 2014 by Paisley *

**statistics**

for mu homework, we are making histograms. on the assignment, we need to list the class limits, class boundaries, midpoint, frequency and relative frequency for each class. i know how to find all of those except for the midpoint since we were not taught this in class. care to ...
*September 5, 2012 by penny lane*

**Math**

Let ABCD be a parallelogram. Let M be the midpoint of AB and N be the midpoint of AD. Diagonal BD intersects CM and CN at P and Q, respectively. Find PQ/BD.
*November 23, 2013 by ASDF*

**Geometry**

Let ABCD be a parallelogram. Let M be the midpoint of AB and N be the midpoint of AD. Diagonal BD intersects CM and CN at P and Q respectively find PC/BD.
*December 6, 2014 by kayla1*

**GEOMETRY - URGENT! HELP!**

Let ABCD be a parallelogram. Let M be the midpoint of AB and N be the midpoint of AD. Diagonal BD intersects CM and CN at P and Q respectively find PC/BD.
*December 6, 2014 by kayla1*

**geometry**

question is: find the coordinates of midpoint P of line BC. Calculate lengths of AP, BP, CP. P is ? (midpoint of BC which bisects <A(0,0), B(0, 2k), C(2h,0). Thank you.
*April 15, 2015 by chloe*

**geometry**

use the midpoint formula to find endpoint c. A = (-3, 2) B is midpoint (5, -4). I know AB is I/2 of AC. I tried and got x= 14, y= -11. Correct? and how do you graph it? Thanks
*April 6, 2015 by kirk*

**geometry**

write a 2 column proof, Given D is the midpoint of AC, E is the midpoint of BC and DE is congruent to EF, prove: DE is parallel to AB and DE = 1/2 AB. answer is 15 steps
*December 29, 2012 by linda*

**math**

write a 2 column proof, Given D is the midpoint of AC, E is the midpoint of BC and DE is congruent to EF, prove: DE is parallel to AB and DE = 1/2 AB. answer is 15 steps
*December 29, 2012 by linda*

**Math, please check work**

find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: (0,0) midpoint: (4, -3) I would Double the midpoint and add on the endpoint The other endpoint would be (8, -6) is this correct?
*December 17, 2009 by Lyndse *

**Geometry**

Geometric Proofs.... Write a justification for each step Given: AB = EF, B is the midpoint of Line AC and E is the midpoint of Line DF. 1. B is the midpoint of Line AC and E is the midpoint of Line DF. 2. Line AB is congruent to Line BC and Line DE is congruent to Line DF 3. ...
*September 20, 2011 by David*

**Math**

Geometric Proofs.... Write a justification for each step Given: AB = EF, B is the midpoint of Line AC and E is the midpoint of Line DF. 1. B is the midpoint of Line AC and E is the midpoint of Line DF. 2. Line AB is congruent to Line BC and Line DE is congruent to Line DF 3. ...
*September 20, 2011 by David*

**hialeah miami lakes**

given triangle PQR with vertices P(0,-8), Q(4,-9) and R(-2,-3), find the length of the midsegment connecting the midpoint of PQ to the midpoint of PR.
*May 3, 2011 by ivette hanon*

**geometry**

I'm having a hard time with this question: "AB has endpoints A(n,4n) and B(3n,6n). Which of the following is true? A. AB=4n B. The midpoint of AB is (2n,2n). C. AB=n√8 D. The midpoint of AB is (4n,10n)". PLEASE HELP!!!!!
*August 25, 2012 by Rick*

**geometry**

Draw and mark a figure in which M is the midpoint of ST, SP = PT, and T is the midpoint of PQ.
*September 1, 2010 by tina*

**NewGeometry**

Line segment XY has a midpoint of L. 1/3XY = 3. What is the midpoint of XY?
*September 29, 2010 by angie*

**geometry**

Line segment XY has a midpoint of L. 1/3XY = 3. What is the midpoint of XY?
*September 29, 2010 by shann*

**geometry**

Triangle ABC, AB=8, BC=10, and AC=12, M is the midpoint of AB, and N is the midpoint of BC. What is the length of MN?
*January 1, 2011 by Will*

**math**

If B is the midpoint of AC, and C is the midpoint of BD, then what percent of CD is AC? A. 25% B. 50% C. 100% D. 200% HELP Is it A, 25%?
*August 15, 2014 by Bladimir*

**Math**

Triangle with vertices: D(-18,12) E(-6,-12) F(12,6) Show that the right bisectors of the sides of triangleDEF all intersect at point C(-4,4), the circumcentre of the triangle. -I found the midpoint of DF then the slope of the midpoint and point E, then found y intercept of new...
*October 14, 2012 by Anonymous*

**Geography**

If D is the midpoint of AC and C is the midpoint of AB and AD=3cm what is the length of AB
*September 9, 2010 by Sabrina*

**Math**

If D is the midpoint of AC, is the midpoint of AB,and BD = 12 cm, what is the length of AB ? Would AB=24 Cm?Thanks
*September 23, 2010 by Shadow*

**geometry**

If R is the midpoint of AB and S is the midpoint of BC and AS:SC=3:2, determine the length of BS if AC=50.
*September 18, 2011 by CC*

**geometry**

B is the midpoint of and D is the midpoint of . Solve for x, given BD = 3x + 5 and AE = 4x + 20.
*November 18, 2011 by Anonymous*

**geometry**

in segment pt, l is the midpoint of pa and a is the midpoint of pn. if pn = 17 and la = 3.5, what is the length of nt?
*April 29, 2012 by Corey*

**Geometry Please Help!**

Given triangle ABC with vertices A(-6, -2), B(2,8), and C(6, -2). Line AB has midpoint D, line BC has midpoint E, and line AC has midpoint F. Which of the following statements is true? 1. ADEF is only a parallelogram 2. ADEF is a rhombus 3. ADEF is a rectable but not a ...
*February 28, 2012 by Anthony*

**Geometry, Help**

1. Reasoning How does the Distance Formula ensure that the distance between two different points is positive? 2. There are two different formulas for midpoint. Is it possible to use the formula for midpoint "on a number line" when you are trying to find the midpoint of two ...
*August 19, 2013 by Unknown*

**geometry**

B is the midpoint of AC, D is the midpoint of CE, and Bd=14. find AE. B is the midpoint of AC, D is the midpoint of CE and BD=7. Find AE.
*December 11, 2011 by james*

**Calculus**

I am in a car and travel for 12 minutes. Below are the speeds in mph, recorded every two minutes. Use trapezoids, right-bound rectangles, and midpoint rectangles to estimate the distance I traveled. Min 0 2 4 6 8 10 12 Speed 20 22 35 46 50 50 20 Trapezoids: Right-bound ...
*February 8, 2015 by Anonymous*

**Math**

Could anyone give me an idea of what to do for this problem? ( Like how do I set it up) Draw and mark a figure in which M is the midpoint of Segment ST, SP=PT, and T is the midpoint of Segment PQ. Thanks
*August 30, 2010 by Shadow*

**geometry**

In the accompanying diagram of triangle ABC side DE is parallel to AC. If BD is 8 and BA is 18, that is all on side d is the midpoint of BA and BC is 27 with the midpoint E what is the length of BE??
*June 8, 2010 by Michelle *

**geometry**

M is the midpoint ofSymbol for segment A B.. Line segment A B, with point M as its midpoint. A M equals M B. Find the coordinates of B given A(3,8) and M(5,4)
*August 26, 2011 by Anonymous*

**Math**

the cube has a volume of 8.If point x,the midpoint of AV is joined to point y, the midpoint of edge CD what is the length of the shortest distance from x to y?
*August 8, 2012 by Grace*

**geometry**

The verticles of triangles BAD are B(1,3) A(7,5) and D (9.-3). If E is the midpoint of segment BA and F is the midpoint of segement AD show that a. segement EF is parallel to BD b. Ef = 1/2BD
*January 29, 2013 by Kevin*

**geometry.**

use midpoint formula to calculate the midpoint of AB. Name it point M and plot it in the graph. Calculate lengths AB, AM, MB. thanks for help.
*April 6, 2015 by robin*

**calculus**

Find the midpoint of the line segment joining the point P1 and P2. P1= (2,5) P2= (-5,6) The midpoint is ___ Type the order pair, use intergers and simplified fractions for any number in the expression. I need this help ASAP Please!!!
*September 12, 2012 by ladybug*

**Math**

Given: Segment AB is congruent to Segment DE Prove: Segment AD is congruent to BE Note: (for the illustration) C is the midpoint of Segment AE, B is the midpoint of Segment AC and D is the midpoint of Segment CE.
*December 14, 2014 by Violet*

**Geometry**

how do you solve using midpoint equation if you only have one pair of points? like to use midpoint equation you usually get two points (4,3) and (5,2) but ive been given only one point (3,1). how do i solve for midpoint with only one set of points? help please
*September 29, 2011 by Madison*

**MIDPOINT OF A LINE SEGMENT**

HOW DO YOU FIND THE END POINT OF A SEGMENT WHEN YOU ONLY HAVE THE MIDPOINT AND ONE OF THE ENDPOINTS??? Why don't you post the problem and tell us what you don't understand about it?
*November 30, 2006 by NONYA BUSINESS*

**ALGEBRA**

Find the coordinates of the midpoint for the following equation: y = -2x^2 + 20x + 1. Your answer should be in the form (x-coordinate, y-coordinate). (Hint: Find the x-coordinate by using the Midpoint Formula [-b / (2a)]. Then find the y-coordinate by plugging the x-...
*March 28, 2010 by GGIFT*

**MATH 157**

I am looking everywhere.....in my notes and in my chapter. What would the other endpoint of a line segment with the given midpoint and one endpoint? ENDPOINT (0,0) MIDPOINT (2, -8)
*September 20, 2009 by ggift*

**Math**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint:(0,0); Midpoint:(2,-8). My answer is:(4,-16). Is this correct? Thanks.
*September 25, 2009 by B.B.*

**geometry**

In trapezoid ABCD, if the base DC = 16 and the base AB = 20 and E is the midpoint of AD and F is the midpoint of BC, what is the measure of EF?
*June 11, 2012 by Anonymous*

**geometry **

B is the midpoint of line AC D is the midpoint of line CE AB is conjecture to DE Prove AE=4AB
*October 20, 2014 by Lay*

**geometry**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: ( 6, -1); Midpoint:(15/2,2
*January 14, 2010 by Kate*

**Math**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint (6, 4): midpoint (3, 5).
*January 17, 2010 by Tim*

**Math**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint (6, 4): midpoint (3, 5).
*February 20, 2010 by Crystal*

**Math**

find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: (6, 4); midpoint: (3, 5)
*April 3, 2010 by Anonymous*

**math**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: (0, 0); Midpoint: ( 2, -8)
*May 23, 2010 by Lisa*

**math**

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint: (0, 0); Midpoint: ( 4, -2)
*May 27, 2010 by Michelle*

**Geometry**

The midpoint of line segment AB is (1,2). The coordinates of A are (-3,6). Find the coordinates of B. I know how to figure out midpoint, but I'm having trouble figuring out how to do this problem. Any help would be appreciated. :)
*September 23, 2009 by Abigail*

**geometry**

Between the points (8,-6) and (-8, 6) find A.) The distance (simplified radical form use sqrt(n). B.) The midpoint ( use ( , ) and .5 for 1/2. Separate answer with commas. Distance, midpoint
*May 8, 2012 by Daniel*

**Please help in triangle**

ABC is an isosceles triangle with AB=BC and ∠ABC=123∘. D is the midpoint of AC, E is the foot of the perpendicular from D to BC and F is the midpoint of DE. The intersection of AE and BF is G. What is the measure (in degrees) of BGA?
*June 19, 2013 by Mathslover*

**geometry**

find other endpoint of line segment with a given endpoint and midpoint endpoint (2,1) Midpoint (-7, 2)
*September 12, 2011 by jordan*

**gepmetry**

given coordiantes for one endpoint and midpoint find the other endpoint? endpoint is (-3,3/7) midpoint is (-2,-11/7)
*March 12, 2013 by paula*

**Physics**

A stretched wire resonates in one loop. The midpoint of the wire oscillates with an amplitude of A. What is the traveled distance of the midpoint in one period? Please help me understand this relationship. Thank you very much!
*April 3, 2015 by Help2*

**MATH**

find y if s is the midpoint of segment RT, T is midpoint of segment RU, RS = 6x+5, ST=8x-1, and TU=11y+13.
*February 12, 2012 by Debbie*

**Physics**

Two positive charges of 6 �C are separated by a distance of 50 cm in air. What is the electric field strength at the midpoint of the line joining the charges? 72.0 V/m 64.8 V/m 6.0 V/m zero V/m I'm honestly clueless because I don't recall ever learning this. However, ...
*October 21, 2012 by Derp*

**physics**

A 380 turn solenoid of length 32.0 cm and radius 3.10 cm carries a current of 4.80 A. Find the following. (a) the magnetic field strength inside the coil at its midpoint mT (b) the magnetic flux through a circular cross-sectional area of the solenoid at its midpoint T · m2
*March 9, 2010 by christiam*

**pre cal**

Q1: Find the length and midpoint of segment PQ given P(3,2) and Q(-1,4) Q2: The midpoint of AB is M(1/2 , 6). Given A(3,7), find the coordinates of B.
*May 14, 2009 by maxine*

**geometry**

given D is the midpoint of line CE E is the midpoint of line df. prove line cd is congruent to line ef give me reasons
*February 3, 2011 by amy*

**geometry question**

Is it possible for AB = 10, BC = 2x + 5 and AC = 5x, given that point B is the midpoint No. I answered the same question last week. The total length of 10 would have to be equal to 7x + 5. That means 7x = 5 x = 5/7 You have an additional requirement that 2x + 5 = 5x, since B ...
*August 1, 2007 by Jim*

**GEOMETRY MIDPOINT FORMULA steve how did this hapn**

If a line is extended from A (2,3) through B ( -2, 0 ) to a point so that AC = 4ab Find the coordinates of C Please help thanks so much GEOMETRY MIDPOINT FORMULA - Steve, Thursday, January 30, 2014 at 11:58am B-A = (-4,-3) C-A = 4(B-A) = (-16,-12) C = A+(C-A) = (-14,-9)
*January 31, 2014 by Joy*

**Geometry HELP**

An isosceles triangle Î”ABC has its altitude at the y-axis and its base at the x-axis. D is the midpoint of segment AC and E is the midpoint of segment CB. Given the coordinates A(-2a, 0), B(2a, 0), and C(0, 2b), determine the coordinates of midpoints D and E. a.)D(2a,-b); E(-...
*June 10, 2010 by Ariel*

**Geometry Help**

1.) An isosceles triangle Î”ABC has its altitude at the y-axis and its base at the x-axis. D is the midpoint of segment AC and E is the midpoint of segment CB. Given the coordinates A(-2a, 0), B(2a, 0), and C(0, 2b), determine the coordinates of midpoints D and E. a.)D(2a,-b...
*June 12, 2010 by Ariel*

**statistics**

I need to find the class midpoint, boundaries and class with for the following problem Tar Cigarette Filter Frequency 2-5 2 6-9 2 10-13 6 14-17 15 I did the midpoint and boundaries 3.5 5.5 7.5 9.5 11.5 13.5 15.5 17.5 But for the width I got an answer of 1.25 can someone please...
*April 19, 2012 by ALFREDA*

**Math**

The position vectors A and B with respect to the origin O,(-8,5) are (12,-5)and respectively. Point M is the midpoint of AB and N is the midpoint of OA. (a) Find: (i) The coordinates of N and M; (ii) The magnitude of NM, (b) Express vector NM in term OB. (c) Point P maps onto...
*October 16, 2012 by Anonymous*

**math **

The position vectors of points A and B with respect to the origin 0, are (-8,5) and (12,-5) respectively. Point M is the midpoint of B and N is the midpoint of OA. (a) Find: (i) The coordinates of N and M (ii) The magnitude of NM (b) Express vector NM in terms of OB (c) Point ...
*October 7, 2013 by kg*

**math**

The position vectors of points A and B with respect to the origin 0, are (-8,5) and (12,-5) respectively. Point M is the midpoint of B and N is the midpoint of OA. (a) Find: (i) The coordinates of N and M (ii) The magnitude of NM (b) Express vector NM in terms of OB (c) Point ...
*October 7, 2013 by Kg*

**Geometry **

Please write a paragraph proof for this statement. 30: Point Y is the midpoint of segment XZ. Z is the midpoint of segment YW. PRove that segment or line XY is congruent to segment or line ZW.
*October 24, 2010 by Shamaree*

**Geometry**

Please write a paragraph proof for this statement. Point Y is the midpoint of segment XZ. Z is the midpoint of segment YW. PRove that segment or line XY is congruent to segment or line ZW.
*October 24, 2010 by Shamaree*

**geometry**

Q is the midpoint of PR. PQ = 3x - 5 and QR = x + 17. What is the value of x?
*September 14, 2010 by Paige*

**math**

c is the midpoint of bc,bc=12, and cd 4x-8 what is the value of x
*March 2, 2012 by Anonymous*

**More math linear equation help?**

I'm looking at this graph where I see a line AB with the points (-2,2) and (2,8). Then I have to do the following: a) Find the length of AB b) Find the midpoint of AB c) Write an equation for the line going through AB I don't understand how to do part a and c, so could ...
*May 31, 2013 by Lily*

**Midpoint Help / Math**

M(-4,-2) is the midpoint of RS. If S has coordinates (-2,5), find the coordinates of R.
*April 23, 2013 by Andy*

**math**

find the distance between the points (-20,16) and (-15,19). also find the midpoint of the segment that joins the points. what is the distance?_____ what is the midpoint?______
*November 1, 2014 by Ernie*

**geometry**

B is the midpoint of. AB=5x+2 AC=12x-2 What is the value of BC?
*June 10, 2011 by Antonisha*

**algerbra**

point b is the midpoint of ac. what is the value of a? c(-3a,6/7a)
*September 1, 2011 by trevor*