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avrihalverson
24.08.2019 •
Mathematics
What is the order, from narrowest to widest graph, of the quadratic functions f (x) = -10x2, f (x) = 2x2, and f (x) = 0.5x2?
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Ответ:
The correct answer is:
f(x) = -10x², f(x) = 2x², and f(x) = 0.5x²
Explanation:
For a quadratic in standard form, f(x) = ax²+bx+c, the value of a describes the width and direction of the parabola. If a is positive, the parabola is open upward. If a is negative, the parabola is open downward.
If a < 1, a fraction or decimal, the graph is wider than the parent function f(x)=x². If a > 1, the graph is narrower than the parent function f(x)=x². The larger the value of a is (a > 1), the narrower the graph is. This makes the function with the decimal value of a the widest; the remaining graphs are in order of the value of a, least to greatest.
Ответ:
$21
Step-by-step explanation:
Given : All swimming equipment is on sale with a 35% discount. a snorkeling set regularly sells for $60.
To Find: find the discount
Solution:
Cost of snorkeling set = $60
Discount % = 35%
So, Discount =![35\% \times 60 =21](/tpl/images/0319/6820/3bf66.png)
=![\frac{35}{100} \times 60](/tpl/images/0319/6820/fdbce.png)
=![21](/tpl/images/0319/6820/bbbab.png)
Hence the discount is $21
So, Option C is correct.