Using a Laplace expansion along the first column, we have
The determinant of a 2x2 matrix is trivial,
So we have
Answer:
The distance is the same(50 meters). So we will operate only with numbers 28.38 and 27.33.
The difference is 28.38-27.33=1.05
So the percent of change is (1.05/28.38)*100%≈3.7%
The answer is 3.7%
Step-by-step explanation:
nice bnha pfp btw
by selling the bicycle and the helmet they made a profit of 84
Best Answer: Look at the discriminant of the quadratic equations to find the number and type of solutions. The discriminant is part of the quadratic formula underneath the square root sign: b^2 - 4ac. If it is positive, then there are two real solutions for that quadratic equation. If the discriminant is 0, then there is one real solution. If the discriminant is positive, then there are two imaginary solutions.
1.) x^2 - 18 = 0
a = 1, b = 0, c = -18
b^2 - 4ac
(0)^2 - 4(1)(-18)
72
ANSWER: 2 real solutions
2.) x^2 + 5x + 7 = 0
a = 1, b = 5, c = 7
b^2 - 4ac
(5)^2 - 4(1)(7)
25 - 28
-3
ANSWER: 0 real solutions
Hope this helps
