Write the two equations in slope-intercept form and then determine how many solutions the system has. 4x - 5y = 216x - 20y = 8
A. None
B. One
C. Infinite number
Answer: C
Mathematics
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Find the domain and range of the relation.
A. domain: (-?, ?), range: (-?, 2] B. domain: (-?, 1], range: (-?, 2] C. domain: (-?, 1) or (1, ?), range: (-?, 2] D. domain: (-?, ?), range: (-?, ?)
Mathematics
Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Solve the problem.Suppose f(x) = 34 + 1.4log (x + 1) models salinity of ocean water to depths of 
at a certain latitude. x is the depth in meters and f(x) is in grams of salt per kilogram of seawater. Approximate the salinity (to the nearest hundredth) when the depth is 946 meters.
A. 38.17 B. 99.80 C. 102.60 D. -29.83
Mathematics
Use the summation properties and rules to evaluate the series. The following rules may be needed: 
.
A. 195 B. 219 C. 40 D. 64
Mathematics