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!
Hello there
Actually, the correct answer is the 9
the first 0 is in the tenths spot, the 3 is in the hundredths, the second zero is in the thousandths, and the 9 is in the ten thousandths, while the 8 is in the hundred thousandths.
Therefore, the 9 is in the ten thousandths place
I hope this helped ^^
<span>4y-9=15
Add 9 to both sides.
4y = 24
Divide both sides by 4.
y = 6
The value of y is 6.</span>
The company should produce "85" DVD's to maximize the profit.
According to the question,
The profit P for producing n DVD copies are
Let,
- The number of units be "n".
Now,
To find the minimize profit,
→ 
→ 
By substracting "3.4" from both the sides, we get
→ 
→ 
→ 
→ 
Thus the answer above is right.
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21:30 and 35:50
Explain:
21:30➗3 =7:10
35:50➗5=7:10
