Evaluate the expression when a=6 and b = 50.
b-4a

Find the value of x. round the length to the nearest tenth

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)