Math

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Please help.

51. Solve:
125=(x3)/0.3^-3

a.7
b.14
c.15
d.9

53. 49x-2 = 7Ö 7

a.-5/4
b.5/4
c.11/4
d.-11/4

60. Simplify:
2log^3 6 - log^3 4

a.3
b.6
c.4
d.2

61. Solve the equation:
logb (x^2 + 7) = 2/3logb 64

a.9
b.3
c. √23
d. ±3

62. Solve:
(The fifth root of x) divided by 9, is equal to 7

no multiple answers available.

66. ln 1/√e

a. -√e
b.-1/2
c.1/e
d.1/2

67. Solve:
e3x = 8

a. In 5/ In 8
b. 3 In 8/ In 3
c. In 8/ 3
d. In 3/ 8

68. Solve:

1/ex = 7

a. In^1/7
b. In 1/7
c. In^7
d. In 7

69. Solve:
3e2x + 2 = 50

a. In 8
b.In 0.25
c.In 14
d. 0.5In 16

70. Solve:
|ln x| = 1

no multiple answers available.

71. Determine if the sequence is geometric, arithmetic, both, or neither: 256, 64, 16, 4, ...

a. Geometric
b. Arithmetic
c. Both
d. Neither

72. Determine if the sequence is arithmetic, geometric, both, or neither:
1/12, 2/13, 3/13, 4/14, ...

a. Geometric
b. Arithmetic
c. Both
d. Neither

73. Find the first four terms of the sequence:
tn = 2n + 1

a. 3; 5; 7; 9
b. 1; 3; 5; 7
c. 9; 11; 13; 15
d. 15; 17; 19; 21

74. Find the next two terms using the pattern in the difference between terms for the sequence:
24, 23, 21, 17, 9, ...

a. -7, -39
b. -3, -15
c. -11, -37
d. -2, -13

75. Find the next two terms using the pattern in the difference between terms for the sequence:
1, 2, 6, 15, 31, ...

a. 63, 127
b. 72, 114
c. 56, 92
d. 44, 73

76. Find the arithmetic mean for the pair of numbers:
2.3, 9.1

a. 10.47
b. 6.3
c. 5.7
d. 8.4

77. Choose a formula for the nth term of the sequence:
a^2/2, a^4/4, a^6/8, ...

a. a^2n/2^n
b. a^2n/2n
c. a^2n/2+n
d.2^n/a

78. A house purchased last year for $80,000 is now worth $96,000. Assuming that the value of the house continues to appreciate (increase) at the same rate each year, find the value 2 years from now.

no multiple answers available.

  • Math -

    51. X^3/0.3^-3 = 125
    0.3^3X^3 = 125
    X^3 = 125/0.3^3
    X^3 = 5^3/0.3^3
    X = 5/0.3
    X = 16.66666667.


    67. e^3x = 8
    3xLne = Ln8
    3x*1 = Ln8
    X = Ln8/3.

    68. 1/e^x = 7
    e^x = 1/7
    x*Ln e = Ln 1/7
    x*1 = Ln 1/7
    X = Ln 1/7.

    69. 3e2x+2 = 50
    6ex = 48
    X = 48/6e = 8/e = 2.943

    70. |Ln x| = 1
    Ln x = 1
    X = e^1 = e = 2.7182.

    78. Increase = 96000-80,000 = $16,000
    %Increase = (16000/80000)*100%=20%/yr.
    V = 80000(1+0.2)^3 = $138,240.

  • Math -

    16 12 10 9 6 6
    farklý ýký sayýlarýn toplam sonuclarý
    ----------------------
    x=4
    w=2
    y=1
    z=3
    u=0
    f=2
    g=1
    h=2
    k=(3)---koken
    ý=1
    j=1
    m=1
    s=0
    t=0
    h=o

    ? ? ? ? ? ?

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