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11Alexandr11 [23.1K]
3 years ago
7

I need help please ASAP!!!!

Mathematics
1 answer:
Allisa [31]3 years ago
7 0

Answer:

A pair of intersecting straight lines which agrees with option A of the answers in the list

Step-by-step explanation:

Recall, how a cone is built, as the surface produced by a line (called the "generatrix") as it moves at a fixed angle pivoting around a fixed point that will become the "vertex" of the cone.

As a plane cuts the cone perpendicular to its base and passing through the vertex, it will just intersect the generatrix trajectory in exactly two locations.

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(a) Find the differential dy.
Step2247 [10]

a. Practically speaking, you compute the differential in much the same way you compute a derivative via implicit differentiation, but you omit the variable with respect to which you are differentiating.

y=\cos x\implies\boxed{\mathrm dy=-\sin x\,\mathrm dx}

Aside: Compare this to what happens when you differentiate both sides with respect to some other independent parameter, say t:

\dfrac{\mathrm dy}{\mathrm dt}=-\sin x\dfrac{\mathrm dx}{\mathrm dt}

b. This is just a matter of plugging in x=\dfrac\pi3 and \mathrm dx=0.1.

\boxed{\mathrm dy\approx-0.087}

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4 years ago
2x-4y=8<br><br> Solve the equation for x in terms of y
Olenka [21]
2x-4y=8

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6 0
3 years ago
Type the answers in the boxes below.
Vaselesa [24]

Let m and h represent hours Mai spends mowing and hauling, respectively. Then (m+h) will be the number of hours Priya spends babysitting. In order for their earnings to be equal, we must have  

 7m +14h = 8.40(m+h)

 Subtract 7m+8.40h:  5.60h = 1.40m

 Divide by 1.40:  m = 4h

Then the total number of hours worked by either person is

 m + h = (4h) +h = 5h

When only whole numbers of hours are worked, the smallest number of hours that will make earnings equal is 5h, with h=1, or 5 hours. In that time, each will earn 5×$8.40 = $42.

Therefore, each of them must work 5 hours and earn $42 before they go to the movies and Mai will work 4 hours mowing and 1 hour hauling.

5 0
3 years ago
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He is riding at 2.5 mph
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