beccadrums
27.07.2019 •
Mathematics
1. what values of a, b, and c would you use in the quadratic formula for the following equation? 5x^2 + 9x = 4 a. a = -4, b = 9, c = 5 b. a = 5, b = 9, c = -4 c. a = 5, b = -4, c = 9 d. a = 5, b = 9, c = 4 2. *skipped* 3. what are the approximate solutions of 2x^2 - x + 10 = 0? a. -2, 2.5 b. -1.97, 2.47 c. -2.5, 2 d. no solution 4. solve the equation using the quadratic formula. 4x^2 + 3x - 10 = 0 a. x = -2, x = 1.25 b. x = -2, x = 2 c. x = -1.25, x = 2 d. x = -1.25, x = 1.25 can someonethe quadratic formula and the discriminant practice, unit 4 lesson 6.
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Ответ:
1) A, B, and C are the coefficients in order when it equals 0. Move over the 4 and you have 5, 9, -4 or Choice B.
3) If you graph the equation, it will be above the x-axis. Therefore, it has no roots. Choice D
4) Choice A is correct. Use the coefficients: A = 4, B = 3, C = -10. Simply plug those into the quadratic equation and you will get -2 and 1.25.
Ответ:
Chance of getting number greater than 4 on one roll:
Either getting a 5 or 6
2/6 probability
2/6 = 1/3
If we roll the cube 12 times, the probability of getting a number greater than 4 is 1/3 of the time
12 * 1/3 = 4
She is expected to get a number greater than 4, 4 times