2points
if b = the number of blue bikes, which algebraic expression represents the
phrase below?
the sum of the number of blue bikes and the 9 red bikes

B+9

Step-by-step explanation:

If your trying to find the sum of both you would just add them together.

Hope it helps

step-by-step explanation:

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000