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Andrej [43]
3 years ago
5

Please help I may give a crown!!

Mathematics
2 answers:
Katen [24]3 years ago
6 0
Answer:
18
Tthe answer is 18

Vladimir79 [104]3 years ago
5 0

Answer:

226.19 in^{2}

Step-by-step explanation:

So to answer the question, we must find the area outside of the bullseye.

In order to do this, we can find the area of the whole circle and subtract the area of the bullseye and what we have left is the area outside of the bullseye.

So the area of a circle is πr^{2}.

We know the bullseye radius is 3 inches so we have r = 3.

= π(3^{2}) = 9π

The radius of the whole circle is 9 inches. so we have r = 9/

= π(9^{2}) = 81π

So now we subtract the bullseye from the whole circle to find the region outside the bullseye.

81π - 9π = 72π

Multiplying 72π should get us

= 226.19 in^{2}

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The focus of a parabola is (4,7) and the directrix is y=8.
disa [49]
We know that the x-ordinate of the vertex is x = 4, because the x-ordinate of the vertex will not change.

Now, the definition of a parabola in locus terms is that for any fixed point that lies on the parabolic shape, it is equidistant from the directrix to the fixed point and the focus to the fixed point.

Thus, we can deduce that:
PS = PD, where P(x, y) is a moving point that lies on the parabola.

Now, we know that the latus rectum will be -4a, because the directrix is higher than the y-ordinate of the focus. Thus, we can say that the vertex will be the midpoint of the two points y = 7 and y = 8, because that is the only place where the definition of a parabola works.

Hence, we can say that the vertex lies at (4, 7.5).

Thus, our general form becomes:
(x - 4)² = 4a(y - 7.5)

To find a, we can say: 7 = 7.5 + a and 8 = 7.5 - a
a = -0.5, because a is the factor in which we move to find the directrix and focus.

Thus, our equation becomes: (x - 4)² = -2(y - 7.5)
3 0
4 years ago
I need help with these question please help me !!
Lynna [10]
For #9 the answer would be C. 
#10 would be A. 
I can't figure out #11 
#12 would be C.
4 0
3 years ago
Need help with this math problem asap!!<br>marking brainliest and giving points ​
zaharov [31]

Answer:

Solution given:

y=2x-5......1.

y=-3x+10.....2.

equating equation 1 &2

2x-5=-3x+10

2x+3x=10+5

x=15/5

x=3

again

y=2×3-5=1

so

<em><u>x,y=3,1 is your answer.</u></em>

3 0
3 years ago
Read 2 more answers
Factor the given expression completely:<br> 147c² + 48
lyudmila [28]

Answer:

= 3(49c^2+16)

Step-by-step explanation:

5 0
3 years ago
Hey yall what is 2⋅2⋅2⋅n⋅n?
Svetach [21]

Answer:

8n^2 8n squared

Step-by-step explanation:

8 0
3 years ago
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