Explain why it works to break apart a number by place values to muiltiply

Terry can run 15 miles in the same amount of time it takes Mark to run 21 miles. If Mark runs 2 mph faster than Terry, How fast does Mark run?

Which algebraic expression is equivalent to the expression below? (2x • 8) (4x • 5) A. (2 • 4) (8 • 5) (x • x) B. (2 • 4) (8 • 5) (2 • x) C. (2 + 4) (8 + 5) (x + x) D. (2 • 4) + (8 • 5) + (x • x)

F over 5 equals negative 4

Has available 480480 yards of fencing and wishes to enclose a rectangular area. (a) express the area a of the rectangle as a function of the width w of the rectangle. (b) for what value of w is the area largest? (c) what is the maximum area?

The total number of 36,78,198,475 and 620 is

Subtract [4 - 4 - 2] - [4 - 3 5]. / A. [0 - 7 3] B. [0 - 1 - 7] C. [0 - 1 3] D. [0 - 1 7]

3/3 as a whole number

The side length of a square is equal to?

How many km are in a meter

Mary can read 6 pages in 4 minutes how many can she read in 14 minutes?