Write an expression to state the problem and simplify.An investor buys 90 shares of stock for d dollars per share. The next day two other investors each buy the same number of shares, but the price has risen by $5 per share. How much have the three investors spent?
A. 90d + 90(d + 5); 180d + 450 dollars
B. 90d + 2 ? 90d + 10; 270d + 10 dollars
C. 90d + 2 ? 90(d + 5); 270d + 900 dollars
D. Cannot be solved
Answer: C
Mathematics
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