16.83 rounded to 1 significant figure

20

Step-by-step explanation:

1 being the first number you then approximate to 2 cause 16 is larger than 5

afterwards round the 6 down to 0

therefore the answer is 20

put a underscore under the 2:_20

Step-by-step explanation:

Decimal notation: _20

No. Of significant figures: 1

No. Of decimals: 0

Scientfic notation: 2e+1

#1 16.83 ( the original number has 4 sig figs)

#2 _20 ( rounded to 1 significant figures)

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)