Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE) Get help from our free tutors ===> Algebra.Com stats: 2010 tutors, 418650 problems solved View all solved problems on Equations -- maybe yours has been solved already! Become a registered tutor (FREE) to answer students' questions. Click here to see problems AND answers on one page Question 197160: I keep getting the incorrect response to this problem. I'm not sure to use the distant formula or the midpoint formula. Can you help me? Find the lengths of the medians of the triangle with vertices A(1, 3), B(3, 5), and C(7, 1). (A median is a line segment from a vertex to the midpoint of the opposite side.) Give your answers correct to one decimal place. ? units (length of median AA') ? units (length of median BB') ? units (length of median CC') Click here to see answer by solver91311(16868)   Question 197108: Sales tax in Pennsylvania is 6%. Create an equation for the total price (cost plus tax) of a purchase in PA in terms of its cost. How much would a person pay for a car whose cost is $32,000? Click here to see answer by jojo14344(1512)   Question 197216: 8(2t+1)=4(7t+7) I got 1/12=t My answer sheet says it should be -5/3 Click here to see answer by edjones(7569)   Question 197223: A=1/2h(b + B) Find the value of B When A=91, h=7, b=12 Click here to see answer by Mathtut(3670)   Question 197222: x-4 over 3 minus 3x-1 over 5 equals 1. not sure where to even begin Click here to see answer by Mathtut(3670)   Question 197228: Tom buys $20,000 worth of stock, and sells it eight months later for $28,000. If he is required to pay 15% capital gains tax on his profits, how much tax will he pay? Click here to see answer by Mathtut(3670)   Question 197227: Find an equation in slope-intercept form passing through the points (-6.2,18.1) and (-3.4,18.1). = = 0 So the equation of the line will be of the form, where c is the y intercept. Or let (x1,y1) = (-6.2,18.1) Solution : Click here to see answer by Mathtut(3670)   Question 197227: Find an equation in slope-intercept form passing through the points (-6.2,18.1) and (-3.4,18.1). = = 0 So the equation of the line will be of the form, where c is the y intercept. Or let (x1,y1) = (-6.2,18.1) Solution : Click here to see answer by mathsteacher(28)   Question 197217: The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth. Click here to see answer by edjones(7569)   Question 197113: The length of a rectangle is four times its width. Its perimeter is 90m. Find its dimensions. Use P= 2l +2w Click here to see answer by checkley77(12569)   Question 197102: Please help me solve this problem. The directions are as follows: Solve the equation by using thew Quadratic Formula. Round to the nearest tenth if necessary. Click here to see answer by checkley77(12569)   Question 197248: 3(x-2)+18=6+2(x+6) Click here to see answer by jim_thompson5910(28476)   Question 197155: please solve 3m-1 over -5 = m-4 over 2 thank you Click here to see answer by scott8148(6628)   Question 197266: Solve this equation please. 2x+1=13 thank you Click here to see answer by jim_thompson5910(28476)   Question 197270: Please solve 2x+7x+6=51 thank u Click here to see answer by jim_thompson5910(28476)   Question 197271: please solve this problem. 8x+3=6x-13 thank you Click here to see answer by jim_thompson5910(28476)   Question 197273: please solve 2x-7 over 3 = 2x+3 over 5 thank you Click here to see answer by user_dude2008(1861)   Question 197277: please solve one half x + x over 3 = 5 over 6 thank you Click here to see answer by jim_thompson5910(28476)   Question 197221: 7/8x - 1/4 + 3/4x = 1/16 + x Click here to see answer by jim_thompson5910(28476)   Question 197283: please solve 1.2x-2.4=1.5x+3 thank you Click here to see answer by jim_thompson5910(28476)   Question 197285: please solve 2x over 3 -5-7 thank you Click here to see answer by jim_thompson5910(28476)   Question 197286: please help. this is what the problem says 2x over 3 minus 5 =7 thank you Click here to see answer by jim_thompson5910(28476)   Question 197287: please help me solve 5x-3(x-4)=18 thank you Click here to see answer by jim_thompson5910(28476)   Question 197288: I have an isosceles triangle. One vertex says (2x-3) (degree sign) and at the other end its (X+15)(degree sign) please solve for x thank you Click here to see answer by jim_thompson5910(28476)   Question 197106: Seven inches are equivalent to 17.78 cm. Find the equation converting length in cm to length in inches. What is the length in inches of a 96.2 cm bar. Click here to see answer by josmiceli(9645)   Question 197106: Seven inches are equivalent to 17.78 cm. Find the equation converting length in cm to length in inches. What is the length in inches of a 96.2 cm bar. Click here to see answer by Edwin McCravy(8879)   Question 197289: Find three consecutive integers such that twice the smallest increased by the largest is 128. thank you Click here to see answer by stanbon(57203)   Question 197297: Eight less than three times a number is 10. Find the number. thank you Click here to see answer by stanbon(57203)   Question 197302: The length of a rectangle is 2 more than three times the width. If the perimeter is 92 cm, find the dimensions of the rectangle. Click here to see answer by anantha(86)   Question 197308: Find four consecutive odd numbers such that the sum of the first and last is 64. thank you Click here to see answer by stanbon(57203)   Question 197308: Find four consecutive odd numbers such that the sum of the first and last is 64. thank you Click here to see answer by RAY100(1637)   Question 197310: Which property justifies the following statement. If 5a-10b=32 then 5(a-2b)=32 A. Commutative Property B. Associative Property C. Distributive Property D. Inverse Property thank you Click here to see answer by RAY100(1637)   Question 197316: A bun cost x pence and a cake costs 3 pence more than a bun. four cakes and thee buns together cost pound 1.60.how much does one bun cost? Click here to see answer by stanbon(57203)   Question 197335: Hi! I checked over this problem a few times, I put it into the point slope form but I'm not sure what I did wrong in my answer: Find an equation of the line that satisfies the given conditions through(2,2); slope 2/3 thanks! Click here to see answer by Edwin McCravy(8879)   Question 197345: Hello! Find an equation of the line that satisfies the given conditions. through (10, 2); perpendicular to the line x - 4y + 4 = 0 thanks! Click here to see answer by solver91311(16868)   Question 197345: Hello! Find an equation of the line that satisfies the given conditions. through (10, 2); perpendicular to the line x - 4y + 4 = 0 thanks! Click here to see answer by stanbon(57203)   Question 197344: Hi! I'm having some trouble with the following problem. Can you help me? Find an equation of the line that satisfies the given conditions. through (1/2, -2/5); perpendicular to the line 3x - 6y = 1 thanks! Click here to see answer by solver91311(16868)   Question 197342: Hi, I'm having some trouble with perpendicular lines, Can you help me? Find an equation of the line that satisfies the given conditions. through (-1, -13); perpendicular to the line passing through (2, -1) and (10, -3) thanks! Click here to see answer by solver91311(16868)   Question 197343: Hi, I'm having some trouble with parallel and perpendicular lines, can you help me? Find an equation of the line that satisfies the given conditions. through (8, 1); parallel to the line passing through (9, -1) and (-4, -5) thanks! Click here to see answer by solver91311(16868)   Question 197343: Hi, I'm having some trouble with parallel and perpendicular lines, can you help me? Find an equation of the line that satisfies the given conditions. through (8, 1); parallel to the line passing through (9, -1) and (-4, -5) thanks! Click here to see answer by stanbon(57203)   Question 197338: Hi I'm having some trouble with the following problem: Find an equation of the line that satisfies the given conditions. through (10, 2); perpendicular to the line x - 4y + 4 = 0 thanks! Click here to see answer by solver91311(16868)   Question 197338: Hi I'm having some trouble with the following problem: Find an equation of the line that satisfies the given conditions. through (10, 2); perpendicular to the line x - 4y + 4 = 0 thanks! Click here to see answer by scott8148(6628)   Question 197428: I'm having some trouble getting the correct answer for this following problem: Write an equation that expresses the statement. (Use k as the constant of variation.) S is jointly proportional to r and θ. Wouldn't the answer be S = kr8? thanks! Click here to see answer by Alan3354(30924)   Question 197429: Hi! I'm not sure what exactly I did wrong in this problem. I came up with the answer 16/3 but it says that its wrong. Can you help me? Express the statement as an equation. Use the given information to find the constant of proportionality. M varies directly as x and inversely as y. If x = 4 and y = 3, then M = -4. thanks! Click here to see answer by Alan3354(30924)   Question 197435: Hi! I'm having trouble with part "c" on this word problem: Hooke's Law states that the force needed to keep a spring stretched x units beyond its natural length is directly proportional to x. (a) Write Hooke's Law as an equation. Use k for the constant of proportionality (b) If a spring has a natural length of 8 cm and a force of F = 48 N is required to maintain the spring stretched to a length of 16 cm, find the spring constant (c) What force is needed to keep the spring stretched to a length of 14 cm? thanks! Click here to see answer by scott8148(6628)

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