Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 242.56
B. x = 14.35
C. x = 5.64
D. x = 0.07
Answer: B
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Find all the second order partial derivatives of the given function.f(x, y) = x2 + y - ex+y
A. 
= 2 + ex+y; 
= ex+y; 
= 
= ex+y
B. 
= 2 - y2ex+y; 
= -x2ex+y; 
= 
= - y2ex+y
C. 
= 1 - ex+y; 
= - ex+y; 
= 
= -ex+y
D. 
= 2 - ex+y; 
= - ex+y; 
= 
= -ex+y
Solve.Amy teaches Chinese lessons for $85 per student for a 6-week session. From one group of students, she collects $1955. Find how many students are in the group.
A. 27 students B. 25 students C. 13 students D. 23 students
Find the first four terms of the sequence.an = an-1 + 8; a1 = -5
A. 0, 8, 16, 24 B. -5, 8, 16, 24 C. -5, 3, 11, 19 D. 3, 11, 19, 27
Translate to an algebraic expression.Robbie drove his car at 70 mph for t hours. How many miles did he travel?
A. 70 - t
B. 
C. 
D. 70t