1. Divide and write in scientific notation: 
3.9 x 10-11
0.39 x 10-10
3.9 x 10-3
none of these
2. Divide and simplify: 
5x9 + 2x10
7x11
5x5 + 2x6
none of these
3. Solve: - 3x - 5 < - 21
x > -16/3
x > 16/3
x < 16/3
none of these
4. Evaluate: 470
47
0
1
none of these
5. Identify which of the following is a linear equation.
3 - 8x = x + 7
none of these
6. Solve: 4y - 5(y - 7) = 28 + y
y= 7/2
y= - 36/2
y= - 35/2
none of these
7. Evaluate; do not write the answer as a decimal: 
81
-81
1/81
none of these
8. Divide and simplify; express the answer using positive exponents only:
21x8y2
none of these
9. Simplify: -7x2yz - 8xy2z + 6x2yz
-x2yz - 8xy2z
-9x3y3z2
8x3y3z2
none of these
10. Solve the equation: 
x = 4
x = 24/7
x = -15/7
none of these
11. If y varies directly as x and y = 44 when x = 11, write the variation equation.
y = (1/4) x
y = 4x
y = 484/x
none of these
12. Solve the inequality (1/2)(x+18) > (1/9)(x+15)
x > -3/7
x < -132/7
x > -132/7
none of these
13. Translate into an equation: the quotient of a number and 5 is 15 less than the
number
x/5 = 15 -x
5x = x - 15
x/5 = x - 15
none of these
14. Rewrite and simplify: 23 weeks to 49 days
23/49
23/343
23/7
none of these
15. Two trains leave New York going opposite directions. If one train is going 50 mph and the other is going
62 mph, how long will it take before they are 280 miles apart?
23.33 hours
2.5 hours
0.4 hours
none of these
16. An odd integer increased by four times the next consecutive odd integer totals - 47.
What are the integers?
-11 and -13
11 and 13
-11 and -9
none of these