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IrinaVladis [17]
3 years ago
9

It costs $0.0015 to leave a lightbulb on for an hour. How much would it cost

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
6 0
The answer would be $1.08
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What is the focus of the parabola?<br><br> y=−14x2−2x−2
nataly862011 [7]
First, we need to transform the equation into its standard form (x - h)²=4p(y - k).
Using completing the square method:

y = -14x² - 2x - 2
y = -14(x² + 2x/14) - 2
y = -14(x² + 2x/14 + (2/28)²) -2 + (2/28)²
y = -14(x + 1/14)² - 391/196
-1/14(y + 391/196) = (x + 1/14)²

This is a vertical parabola and its focus <span>(h, k + p) is (-1/14, -391/196 + 1/56) = (-1/14, -775/392).

Or (-0.071,-1.977).</span>
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If x &gt; 0, which of the following is closest to the value of x that makes the equation below true? ( SHOW WORK )
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Answer:am working on this to study guide

Step-by-step explanation:

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3 years ago
-4(r+2)=4(2-4r)<br><br>solve for r and show work please
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3 years ago
AM I RIGHT PLEASE HELP will mark BRAINLIEST
notsponge [240]
Yeth you are right.......
8 0
3 years ago
Read 2 more answers
Are 35° and -685° coterminal?
Naya [18.7K]

Answer:  YES

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

Coterminal means they are located at the same place on the Unit Circle but are n-rotations clockwise or counterclockwise.

Start with 35° and continue to subtract 360° (which is one rotation) until you reach -685° or pass it.  If you reach -685°, then it is coterminal.  If you pass it, then it is not coterminal.

35° - 360° = -325°

                    -325° - 360° = -685°

So, -685° is 2 rotations counterclockwise to 35°, which means the two angles are coterminal to each other.

6 0
2 years ago
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