Tran drove his car at a constant speed of 55 miles per hour. Which is an equation for the distance Tran drove?

A) 55d=t
B) d = 55t
C) td=55
D) 55d = t

What is the number 321,000,000 in scientific notation? also what is the number? ?

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

Which graph represents the equation y =4x