• 2^-3 = Can you help me with this maths question, thanks?

    2^(-3) = 1 / 2^3 = 1 / 8
    2^(-3) = 1 / 2^3 = 1 / 8
    9 answers · Mathematics · 6 hours ago
  • Ratios Problem, Please Help?

    Red________Yellow 250_________1200 25__________120 5____________24
    Red________Yellow 250_________1200 25__________120 5____________24
    4 answers · Mathematics · 8 hours ago
  • How to verbally say an index root?

    √27 = √ [ 9 x 3 ] = 3 √3________three root three
    √27 = √ [ 9 x 3 ] = 3 √3________three root three
    8 answers · Mathematics · 22 hours ago
  • A boat travels 477 km in 9 hrs upstream and 515 km in 5 hrs downstream. rate of the boat in still water?and what is the rate of the current?

    Let rate in still water = x mph Let rate of water = s mph _____________Downstream______Upstream Speed (km/h)_____x + s___________x - s Distance (km)_____515___________477 Time (h)__________5_____________9 5x + 5s = 515 9x - 9s = 477 45x + 45s = 4635 45x - 45s = 2385________add 90x = 7020 9x = 702 x = 78 390 + 5s = 515 5s = 125 s = 25 Rate in... show more
    Let rate in still water = x mph Let rate of water = s mph _____________Downstream______Upstream Speed (km/h)_____x + s___________x - s Distance (km)_____515___________477 Time (h)__________5_____________9 5x + 5s = 515 9x - 9s = 477 45x + 45s = 4635 45x - 45s = 2385________add 90x = 7020 9x = 702 x = 78 390 + 5s = 515 5s = 125 s = 25 Rate in still water = 78 mph Rate of current = 25 mph
    10 answers · Mathematics · 2 days ago
  • (4-x)/(x-5) > 1/(1-x)?

    [ 4 - x ] [ 1 - x ] > x - 5 4 - 5x + x^2 > x - 5 x^2 - 6x + 9 > 0 [ x - 3 ] [ x - 3 ] > 0 ___________________3______________ x - 3_______-ve______0_____+ve_____ x - 3_______-ve______0_____+ve_____ Product____+ve______0____+ve______ sol set { x < 3 } U { x > 3 }
    [ 4 - x ] [ 1 - x ] > x - 5 4 - 5x + x^2 > x - 5 x^2 - 6x + 9 > 0 [ x - 3 ] [ x - 3 ] > 0 ___________________3______________ x - 3_______-ve______0_____+ve_____ x - 3_______-ve______0_____+ve_____ Product____+ve______0____+ve______ sol set { x < 3 } U { x > 3 }
    7 answers · Mathematics · 2 days ago
  • Trig question?

    tan A + tan B ------------------- 1 - tan A tan B 3/4 - 5/12 ------------------ 1 - (3/4)(-5/12) 1/3 ------------- 1 + 15/48 1/3 --------- 1 + 5/16 1/3 -------- 21/16 16 ---- 63
    tan A + tan B ------------------- 1 - tan A tan B 3/4 - 5/12 ------------------ 1 - (3/4)(-5/12) 1/3 ------------- 1 + 15/48 1/3 --------- 1 + 5/16 1/3 -------- 21/16 16 ---- 63
    7 answers · Mathematics · 3 days ago
  • How do you determine square footage of a round pool?

    What is 14 ft ? Radius? , Diameter ? , Circumference ?
    What is 14 ft ? Radius? , Diameter ? , Circumference ?
    12 answers · Mathematics · 3 days ago
  • How many feet &amp; inches is 86"?

    86 " = 7 ft 2 ins
    86 " = 7 ft 2 ins
    8 answers · Mathematics · 3 days ago
  • (x + 1)/(x - 1) = 2/(x - 1)?

    { x + 1 ] [ x - 1 ] = 2 [ x - 1 ] x^2 - 1 = 2x - 2 x^2 - 2x + 1 = 0 [ x - 1 ] [ x - 1 ] = 0 x = 1
    { x + 1 ] [ x - 1 ] = 2 [ x - 1 ] x^2 - 1 = 2x - 2 x^2 - 2x + 1 = 0 [ x - 1 ] [ x - 1 ] = 0 x = 1
    8 answers · Mathematics · 3 days ago
  • How to solve algebra ASAP?

    n + n + 7 + 2n + 14 = 108 4n = 87 n = 87/4
    n + n + 7 + 2n + 14 = 108 4n = 87 n = 87/4
    7 answers · Mathematics · 6 days ago
  • Which is greater 6 centimeters or 600 meters?

    100 cm = 1 m 600 m is greater
    100 cm = 1 m 600 m is greater
    17 answers · Mathematics · 1 week ago
  • Which linear equation is parallel to y=-3x+8?

    y = - 3x + 2 is such an equation.
    y = - 3x + 2 is such an equation.
    7 answers · Mathematics · 1 week ago
  • Find the slope of the graph at the given point?

    g ` (x) = - 2 e^x g ` (5) = - 2 e^5 = - 296 • 8
    g ` (x) = - 2 e^x g ` (5) = - 2 e^5 = - 296 • 8
    3 answers · Mathematics · 1 week ago
  • Solve 9^x = 3^(2-x)?

    3^(2x) = 3^(2 - x) 2x = 2 - x 3x = 2 x = 2/3
    3^(2x) = 3^(2 - x) 2x = 2 - x 3x = 2 x = 2/3
    7 answers · Mathematics · 1 week ago
  • What is the correct answer to 4-15 (/30 -33)?

    4 - 15 / (-3) = 4 + 5 = 9
    4 - 15 / (-3) = 4 + 5 = 9
    6 answers · Mathematics · 1 week ago
  • Map scale maths?

    Map area is given by :- 5800 x 1000 x 1000 x 100 x 100 ----------------------------------------... cm² 5 x 10^6 5800 x 100 x 100 ----------------------------------------... cm² 5 1160 x 100 x 100 cm² 1•16 x 10^7 cm²
    Map area is given by :- 5800 x 1000 x 1000 x 100 x 100 ----------------------------------------... cm² 5 x 10^6 5800 x 100 x 100 ----------------------------------------... cm² 5 1160 x 100 x 100 cm² 1•16 x 10^7 cm²
    6 answers · Mathematics · 1 week ago
  • How do I simplify: 1 divided by (4 + square root of 3)?

    4 - √3 ------------------------ [ 4 + √3 ] [4 - √3 ] 4 - √3 ---------- 13
    4 - √3 ------------------------ [ 4 + √3 ] [4 - √3 ] 4 - √3 ---------- 13
    11 answers · Mathematics · 1 week ago
  • How to find average speed when distance not specified?

    Let distance to A = x miles t1 = x/50 hours t2 = x/75 hours Total time = x/50 + x/75 hours Time = 3x/150 + 2x/150 hours Time = 5x/150 = x/30 hours Average speed = 2x / [ x/30 ] = 60 mph
    Let distance to A = x miles t1 = x/50 hours t2 = x/75 hours Total time = x/50 + x/75 hours Time = 3x/150 + 2x/150 hours Time = 5x/150 = x/30 hours Average speed = 2x / [ x/30 ] = 60 mph
    7 answers · Mathematics · 1 week ago
  • How to solve this inequation?

    (x - 7) (x - 1) < 0 _______________1___________7_________ x - 7_____-ve________-ve_____ 0_____+ve_____ x - 1_____-ve____0___+ve___________+ve____ product__+ve____0___-ve_____ 0____+ve______ sol. set is { x : 1 < x < 7 }
    (x - 7) (x - 1) < 0 _______________1___________7_________ x - 7_____-ve________-ve_____ 0_____+ve_____ x - 1_____-ve____0___+ve___________+ve____ product__+ve____0___-ve_____ 0____+ve______ sol. set is { x : 1 < x < 7 }
    11 answers · Mathematics · 1 week ago
  • A case of grapefruit weighs 35 3/4 pounds. Of this weight, 1/8 is not ripe. What is the weight of the grapefruit that are ripe?

    7/8 x 143/4 = 31•3 lbs are ripe
    7/8 x 143/4 = 31•3 lbs are ripe
    12 answers · Mathematics · 1 week ago