Explanation
4.3x - 0.7(x+2.1)=8.61 -> 4.3x - 0.7x - 1.47 = 8.61 -> 3.6x = 10.08-> x=2.8
Given f(x) = \(-3x^{2} + 4x + 1\), evaluate f(2).
In Napa Valley, California, 1 acre of good wine land can produce some 3.5 tons of high-quality grapes. When the average price is \(\$3,414\) for premium cabernet per ton, what would be the amount of money that could be generated on 1 acre of premium cabernet farming?
Simplify the given expression. \((4-2)^{2}-(7-2)^{3}\)
John buys 100 shares of stock at \(\$100\) per share. The price goes up by 10% and he sells 50 shares. Then, prices drop by 10% and he sells his remaining 50 shares. How much did he get for the last 50?