Most popular questions and responses by Taina
  1. math

    Rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hr. The speed of the river is 5km/h. Find Abby’s speed in still water.use five-step problem solving process

    asked on June 24, 2011
  2. math

    15t^2+7t=2 The quadratic formula tells you that the solutions are: t = [-b +/-sqrt (b^2 - 4ac]/ (2a) In this case, a = 15, b = 7 and c = -2 solve the equation for t. What values for t will you get when you substitute the values you listed for a, b, and c

    asked on June 24, 2011
  3. Math

    How many times heavier is a 16 1/2 pound rock than a 10 1/2 pound rock

    asked on October 21, 2015
  4. math

    If a stone is tossed from the top of a 210 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 210, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to

    asked on June 20, 2011
  5. math

    Joe has a collection of nickels and dimes that is worth $6.20. If the number of dimes was doubled and the number of nickels was decreased by 37, the value of the coins would be $8.85. How many nickels and dimes does he have?

    asked on June 21, 2011
  6. math

    Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions. x2 = 5x + 6

    asked on June 20, 2011
  7. General Chemistry

    Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?

    asked on August 13, 2011
  8. math

    Solve by factoring: 2a^2-3a= -5

    asked on June 24, 2011
  9. algebra

    1. In solving the equation (x + 3)(x + 1) = 48, Eric stated that the solution would be x + 3 = 48 => x = 45 or (x + 1) = 48 => x = 47 However, at least one of these solutions fails to work when substituted back into the original equation. Why is that?

    asked on June 20, 2011
  10. math

    Express in terms of i. ã-225 + ã-49

    asked on June 21, 2011
  11. math

    Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 8y + 2x = 48 2x = 4y – 12

    asked on June 20, 2011
  12. algebra

    A 125-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 25 ft longer than the height that it reaches on the side of the bridge. Find the horizontal and

    asked on June 20, 2011
  13. Factor (Math)

    Factor by grouping if possible. z^3+3z^2+7z+21

    asked on June 20, 2011
  1. riddle help please

    I have that as well I think it it because it has fleece

    posted on December 19, 2013
  2. 3rd grade


    posted on November 14, 2009