Knowing that cos(45°) = 1/√2 is the way forward.
The last step in the equation may not be obious, but the trick here is to multiple numerator and denominator with (1-√2), then the denominator has the special product (a+b)(a-b) = a²-b².
Answer:
see below
Step-by-step explanation:
(-1, -9) is a vertex or minimum.
(-4, 0) is an x-intercept / zero of the function / solution
(2, 0) is also an x-intercept / zero of the function / solution
The parabola has a minimum.
Hello!
A line of best fit usually shows the average, and usually cuts through the points, leaving about an even amount on both sides.
Graphs B and D are two far to one side of the points, and graph C doesn't correlate with the points at all.
In A, the line puts 6 points on both sides, so it is very even and represents the data very well,
So, our answer is the first graph.
I hope this helps!
Answer: 26.25 is the answer
Step-by-step explanation:
