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kumpel [21]
4 years ago
14

Can someone help me plz?

Mathematics
1 answer:
Anon25 [30]4 years ago
5 0
The first question would be: 0.75
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Does the quadratic have a maximum or minimum
STALIN [3.7K]

Answer:

B)max/ opens down

Step-by-step explanation:

Parabola equation:

The equation of a parabola has the following format:

y = ax^2 + bx + c

If a > 0, that is, x² is multiplied by a positive number, the function has a minimum value and the parabola opens up.

If a < 0, that is, x² is multiplied by a negative number, the function has a maximum value and the parabola opens down.

In this question:

y = -x^2 - 2x + 3

From the graph, we already see that it opens down and has a max, and analitically, since a = -1 < 0, this is confirmed. The correct answer is given by option b.

7 0
3 years ago
the coefficient of correlation between x and y is 0.28 there covariance is 7.6 if the variance of x is 9 then standard division
Reptile [31]

Answer: 9.05

the answer is in here: https://brainly.in/question/13877695

Step-by-step explanation:

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3 years ago
Plz help me will give brainliest
rosijanka [135]

Answer:

10

Step-by-step explanation:

8 0
3 years ago
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"What impact can a very large volcanic eruption have on earth's climate?" 1. It will warm the earth's surface as more lava is re
Ludmilka [50]

The impact of a very large volcanic eruption that have an effect on earth's climate is <u>It will cool the earth's surface as radiation from the sun is blocked from entering the atmosphere.</u>

<u />

Explanation:

A very large volcanic eruption will spew tonnes of fine dust particles (pyroclast) into the atmosphere. These particles will be spread over large area by wind and the particles will remain suspended in the air for longer periods before they settle on the earth's surface.

The suspended particles will block the sun, and by reflecting most of the sunlight before it reaches the earth’s surface, will cause the surface temperatures to drop.  

This same phenomenon caused the demise of dinosaurs after a meteorite strike threw dust particles into the atmosphere that lingered for a long time smothering plant life too.

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The price of an iPad Air is initially $500. iPads owned by a college student depreciate at a rate of 3% per
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