Select the expression that has a value of 13. 9 + 3 x (2 ÷ 3) + 6 (9 + 3) x 2 ÷ 3 + 6 9 − (3 x 2) ÷ 3 + 6 (9 + 3 x 2) ÷ 3 + 6

Select the expression that has a value of 13. 9 + 3 x (2 ÷ 3) + 6 (9 + 3) x 2 ÷ 3 + 6 9 − (3 x 2) ÷ 3 + 6 (9 + 3 x 2) ÷ 3 + 6

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  1. I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.

  2. 1. 26
    2. 13 divided by 14
    3. 27
    4. 12
    5. 38
    6. (9 + 21) divided by 3 + 2 x 5
    7. I’m not entirely sure on this one, but I think the answer is 3 x (2 + 4) x 5

  3. d

    step-by-step explanation:

    i used the pitagoras theoreme

    [tex]Arectangular sheet of paper is folded diagonally from f to h . what is the length of side gh?<[/tex]

  4. RATIONAL NUMBERS,ALGEBRAIC EXPRESSIONS,FACTORISATION,LINEAR EQUATIONS,SQUARES AND SQUARE ROOTS,CUBES AND CUBE ROOTS,EXPONENTS

    1.Name the property of multiplication of the following rational numbers

    -5/16 x 8/15 = 8/15 x -5/16

    Associative

    Transitive

    Closure

    Commutative

    2. Ascending order for the following numbers is :

    (-7)/5,(-7)/4,-1,(-7)/8,1

    (-7)/5,(-7)/4,-1,(-7)/8,1

    (-7)/4,(-7)/5,-1,(-7)/8,1

    -1,(-7)/4,(-7)/5,,(-7)/8,1

    None

    3. Reciprocal of ((–3)/8×(-7)/13) is:

    104/-21

    39/56

    104/21

    d.-39/56

    4. If x/2+1/3=1, then x =

    ¾

    4/3

    -3/4

    d.-4/3

    5.(-7)/13-(-(-8)/15)=

    -239/195

    29/195

    -29/195

    None

    6.(-2)÷((-5)/3)=

    5/6

    -5/6

    6/5

    -6/5

    7. 5/4-7/6-(-2)/3=

    ¾

    -3/4

    -7/12

    7/12

    8.Product of (3 1/7×1 5/6×1 2/5×1 1/11)

    5 8/5

    5 4/5

    8 4/5

    7 4/5

    9.If (–5)/7=x/28.Find x.

    10.Simplify :

    (13/9×(-15)/2)+(7/3×8/5)+(3/5×1/2)

    11. Find the value of (a+b)/(a-b) if a= 4/5 b = 7/9

    12Find the area of a rectangular park which is m long and m broad.

    13.Verify the property and name it

    ALGEBRAIC EXPRESSIONS

    1.Add

    2.Add

    3.Subtract

    4.Subtract

    5.Multiply

    6.Multiply

    7.Simplify:i)

    ii)

    8.Using suitable identities evaluate the following

    9.Simplify (5x-7)(2x+3)(7x-8)

    10.Divide 6x^3-x+19x^2 by x+3

    FACTORISATION

    Factorise the following

    (i) (ii)

    Linear Equations

    II.Solve the following

    Solve

    SQUARES AND SQUARE ROOTS

    1. Square root of 0.0016 is:

    0.8

    0.04

    0.4

    d. 0.08

    2. Which of the following cannot be perfect squares?

    841

    529

    198

    d.All of the above

    3. The hypotenuse of a right triangle with legs 3x and 4x will be

    5x

    7x

    16x

    d. 25x

    4. Given that √4096=64,then find √(40.96)+√(0.4096)

    74

    60.4

    64.4

    d. 7.04

    5.Find the square root of

    25/13

    26/13

    27/13

    d. 28/13

    II.SOLVE THE FOLLOWING

    1.Find the smallest number by which must be subtracted from 2361 to make it a perfect square.

    2.Evaluate the square root of correct to three decimal places

    3.Give two Pythagorean triplets with one member 5.

    4.Find the square root of the rational number 625/6889.

    5. 3600 soldiers are asked to stand in different rows. Every row has as many soldiers as there are rows.find the number of row

    6.Find the perimeter of the square whose area is 6889 sqm.

    CUBES & CUBEROOTS

    √(3&0.000027×0.008)

    0.6

    0.0006

    0.006

    0.06

    2. The cube root of .000343 is

    0.7

    0.07

    0.007

    d. 7

    3. Which of the following is the cube root of -64/343?

    7/4

    -7/4

    4/7

    -4/7

    4.

    2

    -5

    3

    -4

    5. State true or false:

    a. Cubes of a Prime Number are prime.

    b. Cubes of all even natural numbers are even.

    c. Cubes of all negative integers are positive integers

    6. Find the number whose cube is 27000.

    7.What is the smallest number by which 1323 may be multiplied so that the product is a perfect cube?

    8.Show that √(3&27) x √(3&125)=√(3&27x125)

    9.Find the value of √(3&968) x √(3&1375)

    EXPONENTS

    1. 3 × 102 + 2 × 101 + 9 × 100 + 2 × 10–1 + 5 × 10–2

    a. 3292.5

    b. 32.925

    c. 0.32925

    d. 329.25

    2. Which of the following is the standard form of 0.00001275?

    a.1.275 * 10-5

    b.1.275 * 105

    c.127.5 * 10-7

    d.127.5 * 107

    3. What is the reciprocal of (-3 / 4)0?

    a. -1

    b. 1

    c. -4/3

    d. 4/3

    4. x/y= 3/2 then (x^2-y^2)/(x^2+y^2 ) =

    a. 5/3

    b. 5/13

    c. 1/9

    d. 13/5

    5.If 2x.210 = 2-4x then value of x will be

    a. -2

    b. 4

    c. 3

    d. -1

    II.

    1. Simplify {(2/3)^2 }^3×(1/3)^(-4)×3^(-1)×6^(-1).

    2. Find x so that (–5)x+1 × (–5)5 = (–5)7

    3. Find the value of m so that (2/9)^3×(2/9)^(-6)=(2/9)^(2m-1)

    4.Express in power notation

    16/81

    5.Find the value of

    (-2)^5 divided by (-1/3)^4

    6.Evaluate b^2 -9 (b-1)^2 if b=1.1[hint:put b= 11/10]

    7.By what number should (-3/2)^-3 be multiplied,so that the product is (9/8)^-2

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