Solve the problem.On August 10, the Eblin family received 19 pieces of mail, consisting of magazines, bills, letters, and ads. If they received the same number of magazines as letters, three more bills than letters, and five more ads than bills, how many magazines did they receive?
A. 10 magazines
B. 5 magazines
C. 3 magazines
D. 2 magazines
Answer: D
Mathematics
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Convert the decimal to a percent. 9.4
A. 0.94% B. 0.0094% C. 940% D. 94%
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. 
B. -4
C. 2
D. - 
Mathematics
Write a chain rule formula for the following derivative.
for z = f(r, s); r = g(t), s = h(t)
A. 
= 
B. 
= 
+ 
C. 
= 
+ 
D. 
= 
+ 
Mathematics
4
? 1
A. 11
B. 8
C. 9
D. 4
Mathematics