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4 years ago

I need your help guys! :)

Mathematics

1 answer:

nadya68 [22]4 years ago

7 0

Emmmm derecha izquierda 56 a la cuadrada de 4 triangulada sobre17 raíz 12

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A parabola can be represented by the equation x2 = 2y. What are the coordinates of the focus and the equation of the directrix?

SOVA2 [1]

The standard equation for a parabola that opens upward parallel to the y-axis is x2=4ay, where a = distance from the vertex to focus. Vertex is at origin(0,0)
4a=2
a=2/4
a=1/2 or 0.5
the coordinate of the focus is (0, 1/2)
the equation of the directrix is y=-1/2

5 0

3 years ago

Read 2 more answers

1. The most massive planet in the solar system, Jupiter, has a mass of about 1,898,000,000,000,000,000,000,000,000 kg. Estimate

UNO [17]

Answer:

D. $2*10^{27} kg$

Step-by-step explanation:

Mass of Jupiter is given as 1,898,000,000,000,000,000,000,000,000 kg

Estimating this to the nearest whole number would be = 2,000,000,000,000,000,000,000,000,000 kg (rounding up the the "1,898")

To express this in scientific notation form, simply count how many zeros we have to the nearest whole number, 2.

We have 27 zeros there.

Therefore, we would multiply the whole number, 2, by 10 raise to the power of 27.

An estimate of the mass of Jupiter = $2*10^{27} kg$

6 0

3 years ago

Suzanne wants to put a fence around her square garden. If the garden covers an area of 64 ft^2, how many feet of fencing does sh

Art [367]

Answer:

32 feet of fence

Step-by-step explanation:

The garden is a square, so the length and width are equal.

A = L x W

W = L

A = W²

A = 64

W² = 64

W = √64 = ±8 -- (-8) would be extraneous

W = 8 ft

L = 8ft

Since she is putting the fence around the garden, she needs to find the perimeter.

P = 2L + 2W

P = 2(8) + 2(8)

P = 16 + 16

P = 32 ft

32 feet of fence

8 0

3 years ago

0.00045−2.5⋅10 −5 = what is the answer i been up all day

Mama L [17]

If I’m getting this right the equation is: 0.00045 - 2.5 x 10 - 5? The dot in between 2.5 and 10 indicates a multiplication sign

So...

0.00045 - (2.5 x 10) - 5
0.00045 - 25 - 5
= -29.9999 -> -30

8 0

3 years ago

It takes nate four hours to paint a wall and it takes jill seven hours to paint the same wall about how many hours will it take

loris [4]

If Nate paints the wall in 4 hours, it means that he can paint 1/4 of the wall every hour.

Similarly, if Jill paints the wall in 7 hours, it means that he can paint 1/7 of the wall in one hour.

So, together, they paint the following fraction of the wall in one hour:

$\frac{1}{4}+\frac{1}{7} = \frac{4+7}{28} = \frac{11}{28}$ .