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Alina [70]
3 years ago
10

Which equations are true?

Mathematics
2 answers:
bija089 [108]3 years ago
8 0

Answer:

B is correct

Step-by-step explanation:

-(-x) = x, because a double negative like this equals a positive.

Therefore, you are actually saying -x+x= 0 which is true.

azamat3 years ago
3 0

Equation B. is true for all values of x.

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A watermelon is launched from a 25-foot tall platform at a carnival. The watermelon's height h (in feet) at time t seconds can b
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Answer:

The maximum height of the watermelon is 74 feet.

Step-by-step explanation:

The watermelon reaches its maximum height when its velocity is zero. Mathematically speaking, velocity is the first derivative of the function height, that is:

v(t) = \frac{d}{dt} h(t) (1)

Where v(t) is the velocity, in feet per second.

If we know that h(t) = -16\cdot t^{2}+56\cdot t +25 and v(t) = 0\,\frac{ft}{s}, then the time associated with maximum height is:

v(t) = -32\cdot t +56 (2)

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Now we evaluate the function height at time found in the previous step: (t = 1.75\,s)

h(t) = -16\cdot t^{2}+56\cdot t +25

h(1.75) = 74\,ft

The maximum height of the watermelon is 74 feet.

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3 years ago
Solve.<br><br> 8+ x/2= −12 <br><br> Don't add spaces to your answer.
Lady_Fox [76]

Answer:

x=-40

Step-by-step explanation:

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The perimeter is 28 (6 plus 8=14 14x2= 28)

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Plz mark brainliest!

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What is the zero of the function represented by this graph?
eimsori [14]

9514 1404 393

Answer:

  x = -6

Step-by-step explanation:

The zero is where the graph crosses the line y=0 (the x-axis). It is also called the x-intercept.

That point is (-6, 0). The x-value there is -6.

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