Provide an appropriate response.A computer repair shop bought sound cards three times during the year. The first time they bought 25 cards at $4.68 each. The second purchase was for 20 cards that cost $4.75 each. The last purchase of the year was for 16 cards at $4.80 each. What was the average cost of one sound card?
Fill in the blank(s) with the appropriate word(s).
$4.73
Mathematics
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Solve the equation.
- 5 = 0
A. 
B. ?
C. 
D. {120}
Mathematics
Verify the identity.(1 - cos x)(1 + cos x) = sin2x
What will be an ideal response?
Mathematics
Solve the problem.Mardi received an inheritance of $60,000. She invested part at 10% and deposited the remainder in tax-free bonds at 8%. Her total annual income from the investments was $5800. Find the amount invested at 10%.
A. $25,000 B. $54,200 C. $50,000 D. $49,000
Mathematics
Graph the parabola.y = 
(x + 2)2 - 5
A. 
B. 
C. 
D. 
Mathematics