Chemistry Math Review                                                Name ______________________________

1)      2 + 4 x 3 =                                                  2)      4 + 2 x 3 =

3)      2 x 4 + 3 =                                                  4)      2 x 4 + 3 =

5)      40 + 20  =                                                   6)       20 + 40  =
10                                                                          10

7)      40 + 20  =                                                   8)        20 + 40  =
10                                                                           10

9)      (4 + 3) ÷ 6 =                                                         10)    4 + 3 ÷ 6 =

Solve the following equations for x

11) 2x = 8                                                            12) 2 = 8x

13)                                                             14)

15)                                                            16)

17)  where y = 8 and z= 4                            18)   where y = 8 and z= 4

19) (3.0 x 104) + (6.3 x 105)                                           20. (3.0 x 108) x (6.3 x 107)

Use the graph above to answer the following questions.

21. How far had they traveled after 15 seconds?

22. How long did it take to travel 75 m?

23. After 30 seconds, what speed were they traveling?