Which expression is equivalent to 21 + 49?

A 7 (3 + 49)

B 7 (3 + 7)

C 7 (14 + 42)

D 7 (14 + 49)

why do sharks not have swim bladder

During track practice Chris ran 2.5 laps and 81 seconds what was his average time per lap

State whether the following sentences are true or false. 1. Any two similar figures are congruent. 2. Any two congruent figures are similar. 3. Two polygons are similar if their corresponding angles are equal.

What number is equal to square root 64?

Jason has 7 puzzles. quincy has the same number of puzzles as jason. how many puzzles do they have altogether?

For any positive integer n, the length of n is defined as the number of prime factors whose product is n. For example, the length of 75 is 3, since 75 = 3 * 5 * 5. How many two-digit positive integers have length 6?

Graph the linear equation in two variables. Find at least five solutions in the table of values for the equation. y=x-7 Find five ordered pairs that are solutions for the equation y = x - 7

What happens when you multiply any number by 10

The perimeter of a square is 56 cm. What is the approximate length of its diagonal?

What is the answer to 2 2/3 + 4 3/4