Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-5, 0)}
B. infinitely many solutions; {
y = -5} or {
y = 0}
C. {(0, -5)}
D. no solution; ?
Answer: D
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Solve the problem.The temperature (in degrees Fahrenheit) of a dead body that has been cooling in a room set at 70° is measured as 88°. One hour later, the body temperature is 87.5°. How long (to the nearest hour) before the first measurement was the time of death, assuming that the body temperature of the deceased at the time of death was 98.6°. Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.
What will be an ideal response?
Simplify the expression.4-1/2
A. -2
B. - 
C. 2
D. 
Perform the indicated operation.(2n5 + 11n3 + 12) - (4n5 + 7n3 - 5)
A. -2n5 + 4n3 + 7 B. -2n5 + 15n3 + 7 C. 19n8 D. -2n5 + 4n3 + 17
Simplify the expression by combining like terms, if possible.3x2 + 5x - 5 + 3x + 9 + 9x2
A. 12x2 + 8x + 4 B. 24x3 C. 4x2 + 6x + 14 D. 12x4 + 8x2 + 4