Jane earns $25 per hour babysitting. If she starts with $275 in her bank account, which equation represents how many hours (h) she will have to babysit for her account to reach $400?
A) 400= 275+ 15h
B) 400= 15h
C) 400= 15/h +275
D) 400= -275 -15h
Answer: A) 400= 275+ 15h
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = (-2x - 10y)5
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
D. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
Add or subtract as indicated. Simplify, if necessary.
+ 
A. 
B. 
C. 
D. 
Provide an appropriate response.A student is asked to perform the following division: 6 ÷ 2
. He starts by writing 6 ÷ 2
= (6 ÷ 2) + (6 ÷ 
). Do you think this method will give the correct answer? If not, how should the student have proceeded?
What will be an ideal response?
Determine if the graph represents a function.
A. Yes B. No