Translate the word phrase into an algebraic expression.$147 less the cost x
A. 147x
B. 147 - x
C. 147
D. x + 147
Answer: B
Mathematics
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A water source is contaminated with a toxic chemical and is being cleaned. The amount of chemical, in grams, remaining t hours after the cleaning process began is given by
?
.
?
How much of the chemical is removed from time 
to time 
?
?
A. 361.43 grams
B. 4.17 grams
C. 24.34 grams
D. 19.99 grams
Mathematics
Graph the exponential function.y = e-x 
A. 
B. 
C. 
D. 
Mathematics
Find all solutions by factoring.x2 + 5x = 0
A. -5,0 B. 0 C. -5,5 D. 5,0
Mathematics
Convert the mixed number into an improper fraction in lowest terms.2
A. 
B. 
C. 
D. 
Mathematics