That correct answer is 0.0625
Answer:
Lowest score needed=4.92
Step-by-step explanation:
Using the standard normal distribution table we find the value of standard normal deviate corresponding to area of 15%
For area of 15% we have Z= -1.04
Thus we have
Applying values we get
Thus lowest score needed = 4.92
The correct procedure is
This quadratic equation factorizes into
(x + 5)(x + 2) = 0
x = -5 or x = -2.
It is customary to plug the two solutions back into the original equation in order to reject extraneous solutions.
When x = -5,
√(x+6) = 1
x+4 = 1
Accept this solution.
When x = -2,
√(x+6) = 2
x+4 = 2
Accept this solution.
Answer:
Israel solved the problem correctly by obtaining x = -2, -5, but he did not check for extraneous solutions