Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(9x + 5)2
A. 81x2 + 25
B. 9x2 + 25
C. 9x2 + 90x + 25
D. 81x2 + 90x + 25
Answer: D
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Solve the problem.A curved bridge rises over a canyon. The two endpoints of the bridge are one mile apart horizontally. The bridge rises to a height of 350 feet above the horizontal. Approximately what is the walking distance along the bridge, in feet?
Fill in the blank(s) with the appropriate word(s).
Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.y = x2 - 2x - 3
A. vertex (1, - 4);
x-int: (1, 0) and (3, 0);
y-int: (0, -3)
B. vertex (- 1, - 4);
x-int: (-3, 0) and (1, 0);
y-int: (0, 3)
C. vertex (1, - 4);
x-int: (-1, 0) and (3, 0);
y-int: (0, -3)
D. vertex (- 1, - 4);
x-int: (-3, 0) and (1, 0);
y-int: (0, -3)
Determine whether the graph opens upward or downward.y = 3x2 - 12x + 9
A. Upward B. Downward
Solve the problem.A thermometer reading 8°C is brought into a room with a constant temperature of 25°C. If the thermometer reads 18°C after 4 minutes, what will it read after being in the room for 10 minutes? Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to two decimal places.)
A. -7.95°C B. 26.85°C C. 23.15°C D. 25°C