Simplify the expression by combining like terms, if possible.1 + 7(13 - 3m)
A. 21m + 92
B. -21m + 92
C. -21m + 91
D. -3m + 92
Answer: B
Mathematics
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Use implicit differentiation to find dy/dx and d2y/dx2.x3/5 + y3/5 = 7
A. 
= - 
; 
= 
B. 
= 
; 
= - 
C. 
= 
; 
= - 
D. 
= - 
; 
= 
Mathematics
Solve the problem.A church steeple casts a shadow 108 ft long, and at the same time a 9.0-ft post casts a shadow 7.0 ft long. How high is the steeple? Round to the nearest unit.
A. 111 ft B. 84 ft C. 8 ft D. 139 ft
Mathematics
Factor the polynomial completely.120x9y9 - 84x2y6 - 48x4y4
A. 12(10x9y9 - 7x2y6 - 4x4y4) B. 12x2y4(10x7y5 - 7y2 - 4x2) C. 12x2(10x7y9 - 7y6 - 4x2y4) D. x2y4(120x7y5 - 84y2 - 48x2)
Mathematics
Use the Negative Exponent Rules to simplify. Write the answer with positive exponents. All variables are nonzero.
-1
A. -3
B. 3
C. 
D. - 
Mathematics