Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.2 times a number added to -6, added to 9 times the sum of 8 times the number 
A. 9(8x + 7) + [2x + (-6)]; 74x + 57
B. 2x - 6 + 9(8 + 7x); 65x + 74
C. 2(-6 + x) + 9(8x + 7); 74x - 5
D. 2(-6 + x) + 9(8 + 7x); 9x + 60
Answer: A
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Solve the problem by writing and solving a suitable system of equations.A flight leaves San Francisco at src="https://sciemce.com/media/4/ppg__rrrrr0625191014__f1q15g5.jpg" alt="" style="vertical-align: -4.0px;" /> (San Francisco time). This
and arrives in London at 
(London time). This 
difference includes the flight time plus the change in time zones. The return flight leaves London at 
and arrives in San Francisco at 
difference includes the flight time minus the change in time zones, plus an extra hour due to the fact that the return flight westward is into the wind. Find the actual flight time eastward and the difference in time zones.
A. flight time eastward: 10 hours; difference in time zones: 8 hours
B. flight time eastward: 9 hours; difference in time zones: 9 hours
C. flight time eastward: 9 hours; difference in time zones: 8 hours
D. flight time eastward: 11 hours; difference in time zones: 7 hours
Solve the quadratic inequality by sketching the graph of the corresponding quadratic function.x2 - 9 ? 0
A. Solution: [-3, 3]
B. Solution: (-?, -3] ? [3, ?)
C. Solution: (-?, -3) ? (3, ?)
D. Solution: (-?, -3) ? (3, ?)
Use the table values and apply the Simpson's Rule to approximate 
to one decimal place.
x
f(x)
3
1
3.8
0.3
4.6
0.2
5.4
0.8
6.2
0.3
7
0.2
7.8
0.4
??
A. 1.7 B. 1.6 C. 1.3 D. 2.0 E. 2.3
Add or subtract. Simplify the answer.
+ 
+ 
A. 4
B. 2
C. 
D. 