|x + 1| + |x + 2| = 3

0

Step-by-step explanation:

Since there is no negative sign with x, you could just take out the absolute signs.

So after you take them out you have:

x+1+x+2=3

Now, combine like terms:

x+x=2x

1+2=3

Combine into an equation:

2x+3=3

Subtract 3 on both sides:

2x+3-3=3-3

2x=0

Divide 2 on both sides:

x=0

(It would be undefined if it was )

But because it is , it would just be 0.

Hope this helped!

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.

a - base

b - exponent

so,