Convert the mixed number 2 1/4 into an improper fraction: 9/4.
Then multiply this 9/4 by 3: 27/4, or 6 3/4.
No solution for the quadratic equation because of the √-20
Answer: x =4
Mary is 8 and John is 4
Explanation:
John = x
Mary = 5x - 12 or 2x
Solve for x
5x - 12 = 2x
-12 = -3x
X=4
Hope that helps!
Answer:
16
Step-by-step explanation:
The quadratic equation –3 = –x2 + 2x must first be rewritten in standard form:
x^2 - 2x - 3 = 0
or:
1x^2 - 2x - 3 = 0
The coefficients a, b and c are thus {1, -2, -3}, and therefore the discriminant, b^2 - 4ac, is
(-2)^2 - 4(1)(-3), or 4 + 12 = 16