Start by looking at the vertex form of a quadratic function, f(x) = a(x - h)^2 + k. The variables h and k are the values of the vertex. Plug those in to get f(x) = a(x - 4)^2 + 5. To find the variable a, plug in the point given for the x and y values. So, you get (21) = a((8) - 4)^2 + 5. Solve for a algebraically, and you get a = 1. Finally, plug everything in and simplify the equation. You should get that the quadratic function is f(x) = x^2 - 8x + 21. Hope this helps!
I think the answer is b. i'm not completely sure...
Step-by-step explanation:
here's the solution: -
Average time taken by sarah :
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average time taken by sarah = 70.9 seconds
now,
average time taken by katie :
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average time taken by katie = 78.9 seconds
so, sarah is more efficient (faster) than katie.
i agree with sarah.
cuz, she took less time than katie.
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
Here you go mate
Step 1
16x^2-6x-7 Question
Step 2
16x^2-6x-7 Factor
answer
(2x+1)(8x-7)
