Questions on Algebra: Equations answered by real tutors!

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 Question 233220: solve by the elimation method. 0.3x-0.2y=4 0.4x+5y=1 What is the solution set I came up with (220/23, - 130/23) am I right or close to it Click here to see answer by Edwin McCravy(9716)
 Question 233220: solve by the elimation method. 0.3x-0.2y=4 0.4x+5y=1 What is the solution set I came up with (220/23, - 130/23) am I right or close to it Click here to see answer by stanbon(60771)

 Question 233224: Solve by the substitution method 2x+3y=8 -6x+y=36 What is the solution set I came up with ( -2,6) am I close Click here to see answer by Alan3354(34673)

 Question 233233: solve by substitution 2x+6y=14 -3x+y=29 What is the soultion set ( -3,2) am I right Click here to see answer by Alan3354(34673)

 Question 233168: what is the equation for "y varies linearly with x" and "y in inversely proportional to x"? Click here to see answer by stanbon(60771)

 Question 233340: 2x - 8y= -12 8x + 79 = y solve by the substitution method Click here to see answer by stanbon(60771)

 Question 233370: a trawler caught 1/2 ton of fish on monday and 3/8 ton on tuesday and had to throw away 3/5 ton how much fish remained Click here to see answer by rfer(13569)

 Question 233403: when x^13 + 1 is divided by x-1 the remainder is a) 1 b) -1 c) 0 d) 2 e) none Click here to see answer by jsmallt9(3424)

 Question 233483: how do i do this question please explain. Gray trained 32 more dogs than john. Together they trained 126 dogs. how many dogs did gray train. Click here to see answer by Theo(3552)

 Question 233442: Solve the equation for y in terms of x. x + y = 2 Click here to see answer by Alan3354(34673)

 Question 233443: Solve the equation for y in terms of x 6x + 3y = 1 Click here to see answer by rfer(13569)
 Question 233443: Solve the equation for y in terms of x 6x + 3y = 1 Click here to see answer by Alan3354(34673)

 Question 233469: The cost in millions to remove x% of the pollutant in an ocean modeled by C=6000/(200-2x): What is the cost to remove 75% of the pollutant? What is the cost to remove 90% of the pollutant? What is the cost to remove 99% of the pollutant? Click here to see answer by checkley77(12569)

 Question 233539: The equation y = 0.002x+ 0.50 can be used to determine the approximate profit, y in dollars, of producing x items. How many items must be produced so the profit will be at least \$1795? Click here to see answer by rapaljer(4670)

 Question 233563: ½ (y-2) + 2 = 3/8 (3y-4)? is 4 the solution and how do i work it out? Click here to see answer by edjones(7794)

 Question 233695: I need to solve for r A= p + prt Click here to see answer by nerdybill(7090)

 Question 233742: if (3,y) is a solution to the equation 5x+2y=-3, what is the value of y? Click here to see answer by rfer(13569)

 Question 233841: tell whether the given value of the variable is a solution to the equation: 3x+6+x=10:x=-8 Click here to see answer by rfer(13569)

 Question 233989: Find the equation of the line with a slope of -1/2 and containing the point (-3, 2). Click here to see answer by scott8148(6628)

 Question 233988: Find the y-intercept of the line through A(1, 2) and B(-3, -4). Click here to see answer by rfer(13569)

 Question 233982: Find the equation of the line with an x-intercept of -1/2 and a y-intercept of 4. Click here to see answer by rfer(13569)

 Question 233987: What is the domain of the variable x in the equation y = (3x + 5) / (2x + 5x - 3)? Note: in the denominator 2x, x is squared Click here to see answer by nyc_function(2741)

 Question 234056: Which of the following pairs of equations has no solution? A}k+2j=6,k-2j=4 B}k+2j=6,k+2j=4 C}k+2j=6,k+4j=12 d}k+2j=6,k-4j=12 Click here to see answer by stanbon(60771)

 Question 234250: What positive integers satisfy -2 less than or equal to 3x - 4 less than or equal to 7? I have solved the problem this way: 3x = 7 + 4 x = 11/3 Answer. Am I right with my solution and answer. Please show me the correct solution and answer. Thank you very much and God bless. Click here to see answer by rfer(13569)

 Question 234309: Three sides of a triangle are represented by x,x+3 and x+5. The perimeter of the triangle is 35 units. Solve for x Click here to see answer by checkley77(12569)

 Question 234321: I e-mailed Sanbon earlier and I forgot to ask how you write the question in equation form or formulas either way. The problem was: The area of a rectangle is 1260 square inches. It's length is 36 inches find the width. Please help....Thanks. Dee Click here to see answer by Alan3354(34673)

 Question 234440: determine whether the equation defines y as a function of x Click here to see answer by solver91311(18785)

 Question 234498: What is the translation of the statement"w is greater than -3 and less than 4"? A}-3 B}-3>w>4 C}-34 D}-3>w<4 Click here to see answer by Theo(3552)

 Question 234497: What is the translation of the statement"w is greater than -3 and less than 4"? A}-3 B}-3>w>4 C}-34 D}-3>w<4 Click here to see answer by checkley77(12569)

 Question 234530: Previous one had an error...sorry.... FACTORING: I really need help here. I just can't get the factoring for some reason. If someone could help me in a step by step format so that I could get it I'd REALLY REALLY APPRECIATE IT. I thought I had the GCF for the first one as 7x^7 but when I went to check it didn't work out with 35x^7 unless I did something wrong. With the second one, I got confused when the textbook was showing the switching of the variables. #1 Factor completely and if it's a prime, state that it's a prime: 7x^9 - 28x^8 - 35x^7 #2 Same directions 10s^2 + 4st - 6t^2 Click here to see answer by stanbon(60771)