How many 3x3 squares are in a strip of squares that is 3 squares tall and 20 squares long is it a)20 b)19 c)18 d)17

George is 187 cm tall. his son, ralph, is 142 cm tall. who casts the longer shadow. george when the sun is 65° above the horizon, or ralph when the sun is 56° above the horizon? how much longer? (nearest centimeter)

What aspects of lines have to be diffrent

Use the distributive law to multiply. 3(4x + 5y + 6)