Find the number of bricks of size 20cm×12cm×5cm required to build a wall whose volume is 60m3.

Number of bricks is 5

Step-by-step explanation:

We have volume of wall 60m^3. Then we are also given number of bricks size 20cm ×12cm× 5cm.

By multiplying this number we grt 1200cm^3. But answer is needed in meter so divide 1200 with 100 because to change cm into m we need to divide with hundred. Then we have 12m^3 as volume of bricks.

To get no. of bricks we have formula

N = volume of wall ÷ volume of bricks

N = 60 ÷ 12

N = 5

Thus the number of bricks is 5.

Ask me again if you got confused i will explain it more briefly..

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.