3 years ago

FIRST GETS BRAINLIEST

Mathematics

1 answer:

Dominik [7]3 years ago

6 0

Answer:

Step-by-step explanation:

Class tickets she brought was 109 and coach tickets was 24

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Calculate the vertex of the quadratic function: <br> y= -4^2 + 8x -9

expeople1 [14]

Answer:

f(x)=8x-25

Step-by-step explanation:

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3 years ago

Find the mean, median, mode, variance and standard deviation of the following data set

o-na [289]

Answer:

Mean: 9

Median: 9

Mode: 9

Variance: 9

Standard deviation: 9

Step-by-step explanation:

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3 years ago

Which is the equation of the parabola?

Umnica [9.8K]

Answer: $y=-\dfrac{1}{8}(x - 2)^2 - 3$

<u>Step-by-step explanation:</u>

The vertex form of a parabola is: y = a(x - h)² + k where

(h, k) is the vertex
$a=\dfrac{1}{4p}$

NOTE: p is the distance from the vertex to the focus

The vertex (h, k) is (2, -3)

$p=-2\quad \implies\quad a = \dfrac{1}{4(-2)}=-\dfrac{1}{8}$

Insert those values into the vertex formula to get:

$y=-\dfrac{1}{8}(x - 2)^2 - 3$

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3 years ago

Is (5x+4) a factor of (-21x^2-15-40x+5x^3

Tamiku [17]

Answer:

No. It is not.

Step-by-step explanation:

Dividing 5x³+21x²-40x-15 by 5x+4 gives x²+5x-4 with a remainder. Which means, 5x+4 is not a factor of 5x³+21x²-40x-15

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3 years ago

Joni climbed 230 feet up a hill and then rappelled down 300 feet into a valley.

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Answer:

230-300= -70

All you have to do is subtract :)

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4 years ago