Solve the problem.Barges from ports X and Y went to cities A and B. X sent 32 barges and Y sent 8. City A received 22 barges and B received 18. Shipping costs $220 from X to A, $300 from X to B, $400 from Y to A, and $180 from Y to B. $9280 was spent. How many barges went where?
A. 16 from X to A; 16 from X to B; 6 from Y to A; 2 from Y to B
B. 18 from X to A; 18 from X to B; 4 from Y to A; 4 from Y to B
C. 20 from X to A; 12 from X to B; 2 from Y to A; 6 from Y to B
D. 22 from X to A; 10 from X to B; 0 from Y to A; 8 from Y to B
Answer: D
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Add the integers.-18 + 64
A. 82 B. 56 C. 38 D. 46
Divide.
÷ 
A. - 1
B. 
C. - 
D. - 34
Solve the problem.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). By using linear regression, the following function is obtained: 
where x is temperature and y is growth in millimeters. Use this function to predict the growth of a plant if the temperature is 59.
A. 27.05 B. 27.52 C. 27.99 D. 25.81
Simplify the expression. Write the result using positive exponents only.
A. 
x20
B.
 x7? |
C.
x15D.
x22