Solve the equation analytically.
+ 
= - 
A. 
B. 
C. 
D. 
Answer: C
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Part of $9,000 is invested at 11%, another part at 13%, and the remainder at 15% yearly interest. The total yearly income from the three investments is $1,210. The sum of the amounts invested at 11% and 13% equals the amount invested at 15%. Determine how much is invested at each rate, if 2,500 is invested at first rate.
A. $2,500 at 11%, $2,000 at 13%, and $4,500 at 15% B. $3,000 at 11%, $1,000 at 13%, and $4,000 at 15% C. $3,500 at 11%, $1,000 at 13%, and $4,500 at 15% D. $3,000 at 11%, $2,000 at 13%, and $4,000 at 15% E. $2,000 at 11%, $3,000 at 13%, and $3,500 at 15%
Solve the problem.Paul has grades of 73 and 85 on his first two tests. What must he score on his third test in order to have an average of at least 80?
A. at least 79 B. at most 79 C. at most 80 D. at least 82
Find the mass of the lamina that occupies the region D and has the given density function, if D is bounded by the parabola x = y² and the line y = x - 2.
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Solve the system of equations algebraically for real values of x and y.
?
?
Please enter your answer as ordered pairs in the form 
, 
.... The pairs must be separated by commas.
What will be an ideal response?