Solve the problem.Roberto invested some money at 7%, and then invested $3000 more than twice this amount at 12%. His total annual income from the two investments was $4390. How much was invested at 12%?
A. $9000
B. $26,000
C. $2900
D. $29,000
Answer: D
Mathematics
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Add or subtract. Express the answer as a mixed number.13
- 7
A. 6
B. 5
C. 4
D. 5
Mathematics
Solve the problem.f(x) = 2x and g(x) = 14.Find the point of intersection of the graphs of f and g by solving f(x) = g(x).
A. (14, 14) B. (log214, 2) C. (log214, 0) D. (log214, 14)
Mathematics
Graph the quadratic function. Determine the vertex and axis of symmetry.f(x) = x2 + 2x - 3
A. vertex: (1, - 4)
axis of symmetry: x = 1
B. vertex: (- 1, - 4)
axis of symmetry: x = - 1
C. vertex: (1, - 4)
axis of symmetry: x = 1
D. vertex: (- 1, - 4)
axis of symmetry: x = - 1
Mathematics
Solve the problem.
Let x = 24 and y = 6. Find the pitch of the roof.
A. 
B. 
C. 
D. 
Mathematics