# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 601510: if f(x)= (x-3)/ (x+2) find an expression for f'(x) Click here to see answer by stanbon(57387)

 Question 601723: What is this problem simplified: p-(-1/15p) I got the answer 1 1/15p. Is this correct? Click here to see answer by Alan3354(30993)

 Question 601727: Ugh, having a mental lapse and would appreciate any and all help on these... Simplify and write your answer to one significant digit: (0.0086 X 10 (to the negative two power) ) (1.2 X 10 (to the eight power) ) ___________________________________________________________________________ (2 X 10 (to the eight power) ) (60,000) & (40 X 10 (to the negatvie tenth power))(42 X 10 (to the negative fourth power) ) ________________________________________________________________________________ (97, 400) (425) These are also tripping me up: Add, subtract, multiply, or divide, as indicated, and round each result to the proper number of significant digits: 52.8 X 10 (to the sixth power) _______________________________ 3.0 X 10 (to the tenth power & (53.41 X 10 (to the negative first power) + (327. X 10 (to the negative fourth power) & Write the result in of the following in rectangular form: 16/185degrees + 10.0/333degrees & A block of gold weighs 314 newtons. if the density of gold is 19,300 kilograms per cubic meter, what is the volume of the block? What i've noticed is that they want the answers in scientific notation format... Thanks so much!! Click here to see answer by Alan3354(30993)

 Question 601842: The width of a rectangular lawn is 3m less than half its length. The perimeter is 42m. Show that w+l=21. write an equation for the width and calculate the width of the lawn. Click here to see answer by nerdybill(6962)

 Question 601936: 6x − 3y = 18 6x + 3y = −12 Solve using substitution Click here to see answer by flame8855(424)

 Question 602063: How do you solve this? 4 + 4x = (x + 20) /2 Click here to see answer by jim_thompson5910(28598)

 Question 602076: write the equation of the line that passes through (4,-2) and (4,3) Click here to see answer by jim_thompson5910(28598)

 Question 602070: write the equation of the line that passes through (-3,-2) and (1,-2) in the form y=mx+b Click here to see answer by mananth(12270)

 Question 602173: Hello could someone please help me with this equation, I am so stuck! I have tried to make a formula but it is not working. I tried (x*.2)+(y*.5)=25.30 but this formula does not include the 68 because I do not know where to put it. The equation is below. Mike saves all his 50 cent & 20 cent coins. When he counts them he finds he has 68 coins amounting to \$25.30. How many of each type of coin does he have? Click here to see answer by Alan3354(30993)
 Question 602173: Hello could someone please help me with this equation, I am so stuck! I have tried to make a formula but it is not working. I tried (x*.2)+(y*.5)=25.30 but this formula does not include the 68 because I do not know where to put it. The equation is below. Mike saves all his 50 cent & 20 cent coins. When he counts them he finds he has 68 coins amounting to \$25.30. How many of each type of coin does he have? Click here to see answer by mananth(12270)

 Question 602422: Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places (7.44 · 10^5) / (1.66 · 10^3) Click here to see answer by Alan3354(30993)
 Question 602422: Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places (7.44 · 10^5) / (1.66 · 10^3) Click here to see answer by jim_thompson5910(28598)

 Question 602650: The difference of five times a number and seven times the same number is 16.Solve for the unknown number Click here to see answer by Alan3354(30993)

 Question 602806: x2 + y2 = 4 x2 + y = 40 The numbers after the 'x' and 'y' are supposed to be integers.Please can you work out this simultaneous equation . thanks Click here to see answer by Alan3354(30993)

 Question 602804: x2 + y2 = 4 x2 + y = 40 Please can you work out this simultaneous equation . thanks Click here to see answer by Alan3354(30993)

 Question 602869: kindly give me the solution for following equation of factorization. X^2+8x-2=0 Click here to see answer by Alan3354(30993)

 Question 603003: What is the first step in solving this equation? 9p + 12 = 57 A. adding 12 to each side B. subtracting 12 from each side C. multiplying each side by 9 D. dividing each side by 9 Please help! Click here to see answer by solver91311(16897)

 Question 603001: I need help to solve 1-2x+4x=8 show how to do it Click here to see answer by solver91311(16897)

 Question 603109: Exercise: y+12=3 4+6+y b-1/5=3/8 9=9-5 -6=d+3 10=7+d 96=16q -50=25c 3/5c=-6 10y=-20 6(2d-5)=5(3d+2)+d 10(3a-4)=5(4c-3)-5a 2t--1+5t=4t=5-t 5p-9=2p+6 (-2p2q)(3pq)(-6pq3) 25n-50/5 5x+6>3 -3x>9 6x<12 2x,4x+10 6x>2x-6 Click here to see answer by Alan3354(30993)

 Question 603325: I think of a number. I double it, add 120 and then add the number i first thought of. The answer is 360. What is the number? Click here to see answer by bucky(2189)