Find the slope and the y-intercept of the line.y = 
x
A. m = 0; b = 
B. m = 1; b = 0
C. m = 4; b = 
D. m = 
; b = 0
Answer: D
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The amount D, in milligrams, of a drug in the bloodstream t minutes after injection is given by
.
?
There are two times when there are 7 milligrams of the drug in the bloodstream. Find both times. Round your answer to two decimal places if necessary.
A. There are never 7 milligrams of the drug in the blood.
B. 
and 
C. 
and 
D. 
and 
Evaluate the sum.
A. 55,260 B. 230 C. 30 D. -230
Solve.In one year, a baseball player got 148 hits in 483 times at bat. What was his batting average? Give decimal notation to the nearest thousandth.
A. 0.316 B. 0.306 C. 0.309 D. 0.286
Ten full crates of walnuts weigh 390 pounds, whereas an empty crate weighs 5 pounds. How much do the walnuts alone weigh? ? __________ pounds ?
Fill in the blank(s) with the appropriate word(s).