Find 
and 
.f(x, y) = 10x - 10y2 - 6
A. 
= 10; 
= -20y
B. 
= 10x; 
= -20y
C. 
= -20y; 
= 10
D. 
= 4; 
= -20y - 6
Answer: A
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Express the number in decimal notation.8.1 × 105
A. 81,000 B. 8,100,000 C. 405 D. 810,000
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: 138 beats per minute(ii) Mathilda: 147 beats per minute
A. (i) Abigail: 
= 278
(ii) Mathilda: 
= 287
B. (i) Abigail: 
= -2
(ii) Mathilda: 
= -7
C. (i) Abigail: 138 - 140 = -2
(i) Mathilda: 147 - 140 = 7
D. (i) Abigail: 
= 2
(ii) Mathilda: 
= 7
Provide an appropriate response.For what value of c does the quadratic function f(x) = 3x2 + 8x + c have exactly one x-intercept?
A. 16
B. 
C. 
D. - 
The amount of electricity used in a typical all-electric home is shown in the circle graph. If, in a certain month, a home used 2,000 kwh (kilowatt-hours), find the amounts of electricity used by the water heater from the graph.
?
?
A. 2,200 kwh B. 22,000 kwh C. 220 kwh D. 1,818 kwh E. 182 kwh