• Solve for x 27=9^x-1 please help?

    8 answers · 23 hours ago
  • How many dollars is 333 pennies?

    19 answers · 1 day ago
  • What is a perpendicular line?

    18 answers · 1 day ago
  • How does 2 negatives make a positive?

    Best answer: Keep in mind that the negative sign indicates the number is the additive inverse of what it's applied to. There are only two real number operations: addition and multiplication. Subtraction is the addition of the additive inverse, and division is multiplication by the multiplicative inverse. That may seem like... show more
    Best answer: Keep in mind that the negative sign indicates the number is the additive inverse of what it's applied to. There are only two real number operations: addition and multiplication. Subtraction is the addition of the additive inverse, and division is multiplication by the multiplicative inverse. That may seem like it's over-complicating things, but it's really just getting back to the basic definition of the operations.

    Looking at it this way also allows us to prove that the product of two negatives is a positive. It's not good enough to just say it's the way it is, or it's a rule or law of math. We need to demonstrate why this "rule" is consistent with the other definitions governing the number system.

    First let's think about a negative times a positive.
    Suppose you have (-2)(3). Why is this -6?
    Well, if you take (2)(3) + (-2)(3) = 6 + (-2)(3), by the distributive property that's equal to
    (2 + (-2))(3) = 0(3) = 0
    So (-2)(3) is additive inverse of 6, or -6

    Similarly, (2)(-3) works out to be the same thing, -6.

    Now suppose you have (-2)(-3)
    Consider (-2)(-3) + (2)(-3), which is equal to (-2 + 2)(-3) = 0
    So (-2)(-3) must be the additive inverse of (2)(-3), which is -6.
    So (-2)(-3) = +6

    I hope this was helpful.
    14 answers · 1 day ago
  • What's zero divided by zero?

    127 answers · 6 days ago
  • Is the series 1-1/2+1/3-1/4+... convergent or divergent?

    Is the series 1-1/2+1/3-1/4+... convergent or divergent?

    Best answer: Answer
    Best answer: Answer
    4 answers · 2 days ago
  • Math (I don't regret asking)?

    If you double a number and add 1 you get 11, what is this number?
    If you double a number and add 1 you get 11, what is this number?
    16 answers · 2 days ago
  • What is the reciprocal of 7 1/3?

    14 answers · 2 days ago
  • Maths Help?

    √1000 is equal to: a. 31.6228 b. 50√2 c. 50√10 d. 10√10 e. 3√10 I think the answer is a. 31.6228, but the book says the answer it is d. 10√10. Please explain the answer in full working out. Thank you.
    √1000 is equal to: a. 31.6228 b. 50√2 c. 50√10 d. 10√10 e. 3√10 I think the answer is a. 31.6228, but the book says the answer it is d. 10√10. Please explain the answer in full working out. Thank you.
    7 answers · 55 mins ago
  • Blank divided by 9+3 = 2?

    8 answers · 20 hours ago
  • What is 1\10 of 5 dollars?

    22 answers · 4 days ago
  • Help me out with math?

    I ve got this formula: e^2x-9 = 2 Here s what I did.. e^2x-9 = (2)^0 e^2x-9 = e^0 2x-9 = 0 2x = 9 x = 4,5 However, the answer is approx. 4.8466 where did I go wrong? Thanks
    I ve got this formula: e^2x-9 = 2 Here s what I did.. e^2x-9 = (2)^0 e^2x-9 = e^0 2x-9 = 0 2x = 9 x = 4,5 However, the answer is approx. 4.8466 where did I go wrong? Thanks
    8 answers · 1 day ago
  • How do I find X ? i keep getting it wrong?

    How do I find X ? i keep getting it wrong?

    Best answer: 1:2:√3 for any 30°-60° right triangle, where 1 is short side and 2 is hyp.
    This says "multiply short side by √3 to get longer leg"
    so in your triangle
    x√3 = 12
    therefore
    x = 12/√3
    if you rationalize denominator (multiply top and bottom by √3), it becomes after reducing:
    x = 4√3.
    Best answer: 1:2:√3 for any 30°-60° right triangle, where 1 is short side and 2 is hyp.
    This says "multiply short side by √3 to get longer leg"
    so in your triangle
    x√3 = 12
    therefore
    x = 12/√3
    if you rationalize denominator (multiply top and bottom by √3), it becomes after reducing:
    x = 4√3.
    6 answers · 2 hours ago
  • What is 2/3 as a decimal?

    19 answers · 4 days ago
  • Answer of 6+4+2?

    21 answers · 4 days ago
  • Need help with this one math problem?

    Fifteen gourmands could put away 45 pounds of food in 2 hours. How many pounds of food could 25 gourmands put away in 10 hours?
    Fifteen gourmands could put away 45 pounds of food in 2 hours. How many pounds of food could 25 gourmands put away in 10 hours?
    7 answers · 1 day ago