Solve this world problem. half of a number, plus a fifth of two less than the number ,is 4 less than the number .what is the number

Step-by-step explanation:

let x be the number

1/2x + 1/5(x - 2) = x - 4

1/2x + 1/5x - 2/5 = x - 4multiply by 10 to get rid of the fractions

5x + 2x - 4 = 10x - 40

7x - 4 = 10x - 40

-4 + 40 = 10x - 7x

36 = 3x

36/3 = x

12 = x <===

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.

(0,,,0)

step-by-step explanation:

the table of x and y values is shown in the attached pic(part of question)

we have to decide according that graph

given points are (0, 0) (–1, 0), (2, 0)

when we graph these points on graph they show an increasing line as shown in the attached pic