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Bad White [126]

3 years ago

14

PLEASE HELP! I DON'T UNDERSTAND!

1 answer:

svet-max [94.6K]3 years ago

8 0

The answer would be 15/7 or 2 1/7

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What is the vertex of f(x)=-x^2-8x

frez [133]

$\bf f(x) = -x^2-8x\implies f(x) = -x^2-8x+0 \\\\[-0.35em] ~\dotfill\\\\ \textit{vertex of a vertical parabola, using coefficients} \\\\ f(x)=\stackrel{\stackrel{a}{\downarrow }}{-1}x^2\stackrel{\stackrel{b}{\downarrow }}{-8}x\stackrel{\stackrel{c}{\downarrow }}{+0} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right) \\\\\\ \left(-\cfrac{-8}{2(-1)}~~,~~0-\cfrac{(-8)^2}{4(-1)} \right)\implies \left( -4~~,~~0+\cfrac{64}{4} \right)\implies (-4~,~16)$

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3 years ago

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Jayden and Caden share a reward of $140 in a ratio of 2:5. What fraction of the total reward does Jayden get

Rama09 [41]

Jayden gets 40 and caden gets 100

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3 years ago

Find the difference between the fastest girls time and the slowest girl time. Barbra ran 3 3/10, Donna ran 2 4/5 , Cindy ran 4 3

Xelga [282]

Answer: 2.5 or 2 1/2

Step-by-step explanation:

You can convert the mixed fractions to decimal numbers:

- Divide the numerator by the denominator of the fraction.

- Add the result to the whole number.

Thenyou have:

Barbara's time: $3\ 3/10=3+0.3=3.3$

Donna's time: $2\ 4/5=2+0.8=2.8$

Cindy's time: $4\ 3/5=4+0.6=4.6$

Nicole's time: $2\ 1/10=2+0.1=2.1$

As you can see, the fastest girl is Cindy and the slowest girl is Nicole.

Then, you must make the following subtraction to calculate the difference:

$4.6-2.1=2.5$ or 2 1/2

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4 years ago

2. A 2-pint bottle of olive oil costs $2.68. If

tino4ka555 [31]

Answer:

21.44 All you need to do is divide the 2.68 by 2 then multiply it by 16

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3 years ago