Evaluate the expression according to the replacement value given.8a - 2b; replace a with 9 and b with 5.
A. 82
B. 67
C. 62
D. 70
Answer: C
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Solve.The formula for converting from Celsius temperature to Fahrenheit temperature is TF = 
TC + 32, where TC is the temperature in degrees Celsius. (i) Solve the formula for TC. (ii) Find the corresponding Celsius temperature for a temperature of 161°F. Round to the nearest tenth, if necessary.
A. (i) TC = 
(TF - 32)
(ii) 232.2°C
B. (i) TC = 
TF - 32
(ii) 321.8°C
C. (i) TC = 
TF - 32
(ii) 85.9°C
D. (i) TC = 
(TF - 32)
(ii) 71.7°C
Write fractions to represent the shaded and unshaded portions of the figure.
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Solve the problem.It is recommended that a woman who is pregnant should exercise such that her heart rate does not exceed 140 beats per minute. Use absolute value notation to write an expression that describes the difference between the heart rate achieved by each of the following pregnant women and the recommended maximum heart rate. Then evaluate that expression.(i) Abigail: 125 beats per minute(ii) Mathilda: 141 beats per minute
A. (i) Abigail: 
= 15
(ii) Mathilda: 
= 1
B. (i) Abigail: 
= -15
(ii) Mathilda: 
= -1
C. (i) Abigail: 125 - 140 = -15
(i) Mathilda: 141 - 140 = 1
D. (i) Abigail: 
= 265
(ii) Mathilda: 
= 281
Subtract.(-6x6 + 3x8 + 4 - 3x7) - (-1 + 8x7 + 9x8 + 3x6)
A. 12x8 + 5x7 - 3x6 + 3 B. -6x8 - 11x7 - 9x6 + 5 C. 12x8 + 5x7 - 3x6 + 5 D. -6x8 + 5x7 - 3x6 + 3