Provide an appropriate response.Solving for which variable in which equation involves the least amount of work?y = 3x + 157x + 7y = -91
A. x in equation 2
B. x in equation 1
C. y in equation 2
D. y in equation 1
Answer: D
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Find the divergence of the field F.F = 
A. 
B. 0
C. 
D. 
Let x represent the number. Use the given conditions to write an equation. Solve the equation and find the number.When 4 times a number is subtracted from 7 times the number, the result is 30. Find the number.
A. 7x - 4x = 30; 10 B. 4(x - 7) = 30x; 0.9 C. 4x + 10x = 30; 3 D. 4x(7 - x) = 30; -10
Solve the application.A worker has readings that take 
minute each to read and record. How many readings can be completed in 30 minutes?
A. 12 readings B. 45 readings C. 20 readings D. 10 readings
Find the simple interest. Round your answer to the nearest cent.Principal = $18,800Rate = 4%Time in years = 6
A. $12,533.33 B. $451.20 C. $783.33 D. $4512.00