Answer:
x = 8√13 ≈ 28.8444
Step-by-step explanation:
It looks like you want to evaluate ...
Your calculator can tell you the value of this. It is approximately 28.8444.
Answer:
I feel like you are mistaken on the first question...
6 plus 27 equals 33.
33 equals 100 percent.
What is 6 over 33? 0,18.
What's 27 over 33? 0,82.
Therefore, 19 plus 12 equals 31.
19 divided by 31 equals 0,61.
12 over 31 equals 0,39.
Answer:
The roots are -2 and -3
Step-by-step explanation:
For a quadratic equation given as x² + bx + c, for roots x and y, the sum of roots is equal to the negation of the coefficient of the second term (i.e x + y = - b) while the products of the roots is equal to the coefficient of the second term (i.e x × y = c).
Since for the roots 1 and 6, only the value of c was correct, to get c we use the product of roots. Therefore, c = 1 × 6 = 6
Since for the roots -1 and -6, only the value of b was correct, to get b we use the sum of roots. Therefore:
-b = - 1 + -4 = -5
b = 5
Since the quadratic equation is x² + bx + c, substituting value of b and c and solving:
x² + 5x + 6 = 0
x² + 2x + 3x + 6 = 0
x(x + 2) + 3(x + 2) = 0
(x + 2)(x + 3) = 0
x = -2 or x = -3
The roots are -2 and -3
Answer:
P(B) = 0.6
Step-by-step explanation:
P(A and B) = P(A) * P(B)
0.12 = 0.2 * P(B)
P(B) = 0.6
P(A or B) = P(A) + P(B) - P(A and B)
0.68 = 0.2 + P(B) - (0.12)
P(B) = 0.6