Quiz Discussion

A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is

• 1]

  2 mph

• 2]

  2.5 mph

• 3]

  3 mph

• 4]

  4 mph

Find the roots of the quadratic equation: 2x² + 3x - 9 = 0?

• 1]

  3, -3/2

• 2]

  3/2, -3

• 3]

  -3/2, -3

• 4]

  3/2, 3

Find the roots of the quadratic equation: x² + 2x - 15 = 0?

• 1]

  -5, 3

• 2]

  3, 5

• 3]

  -3, 5

• 4]

  -3, -5

One root of the quadratic equation x² - 12x + a = 0, is thrice the other. Find the value of a?

• 1]

  29

• 2]

  -27

• 3]

  28

• 4]

  27

If the roots of the equation 2x² - 5x + b = 0 are in the ratio of 2:3, then find the value of b?

• 1]

  3

• 2]

  4

• 3]

  5

• 4]

  6

The sum and the product of the roots of the quadratic equation x² + 20x + 3 = 0 are?

• 1]

  10, 3

• 2]

  -10, 3

• 3]

  -20, 3

• 4]

  -10, -3

 If a and b are the roots of the equation x² - 9x + 20 = 0, find the value of a² + b² + ab?

• 1]

  -21

• 2]

  21

• 3]

  1

• 4]

  61

The sum of the squares of two consecutive positive integers exceeds their product by 91. Find the integers?

• 1]

  9,10

• 2]

  10,11

• 3]

  11,12

• 4]

  12,13