If 20 articles cost ? 90, then the cost of 9 articles is ? A. 45
B 4.50
C.40.50
D. 42

The equation y=mx+b is the slope-intercept form of the equation of a line. what is the equation solved for b? y-m=b y-mx=b y/mx=b y/m-x=b

Without any equipment, you can see stars that are 2{,}800{,}0002,800,0002, comma, 800, comma, 000 light-years away. by looking through a small telescope, you can see stars that are 3{,}112{,}000{,}0003,112,000,0003, comma, 112, comma, 000, comma, 000 light-years away. approximately how many times as far can you see using a small telescope as without any equipment?

Angles 1 and 2 are complimentary angles. angle 1 = 52 degrees. what is the measure of angle 2?