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kirill [66]
4 years ago
9

Write the equation of the parabola y=x^2 + 8x - 51

Mathematics
1 answer:
nikdorinn [45]4 years ago
7 0
You already have the equation!  If you want it in vertex form, do this:

y = x^2 + 8x + 16 - 16 - 51, or y = x^2 + 8x + 16 -67, or 
                                                 y = (x+4)^2 - 67.  
The vertex is at (-4,67).
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What is the area of the composite figure? (6π 4) cm2 (6π 16) cm2 (12π 4) cm2 (12π 16) cm2
raketka [301]

The area of the considered composite figure is given by: Option: 6π + 16 cm²

<h3>How to calculate the surface area of a composite figure?</h3>

Surface area are derived for some standard shapes like circle, triangle, parallelogram, rectangle, trapezoid, etc.

When some shape comes which isn't standard figure, then we find its area by slicing it (virtually, like by drawing lines) in standard shapes. Then we calculate those composing shapes' area and sum them all.

Thus, we have:

\text{Area of composite figure} = \sum (\text{Area of composing figures})

That ∑ sign shows "sum"

For this case, the missing image is attached below.

As visible, the area of the figure = Sum of area of those 3 semi circles + Area of that square(its square because it has 4 equal sides in which adjacent sides are perpendicular) in between.

The side of the square is of 2+2=4 cm( as half of its side is 2 cm), thus, Area of that square = 4² = 16 cm²

All those 3 semicircles has radius = 2 cm

Since radius is same, so area of those 3 semicircle is same = \dfrac{\pi r^2}{2} = \dfrac{\pi (2)^2}{2} = 2 \pi\: \rm cm^2

Thus, we get:

Area of the composite figure = 2 \pi +2 \pi +2 \pi  + 16 \: \rm cm^2 = 6 \pi+ 16 \: \rm cm^2

Learn more about area of a composite figure here:

brainly.com/question/10254615

6 0
3 years ago
The letter Y has a horizontal line of symmetry when it is written as a capital letter . Find five other letters that have a vert
34kurt

Answer:

the y is a horizontal line

Step-by-step explanation:

cause its is across

7 0
4 years ago
Jack went to the cash point. He drew out the same amount of money as he had in his pocket. He then spent £40 on CDs.
Liula [17]

Answer:

£30

Step-by-step explanation:

Jack had 30 pounds, he withdrew 30 more and had 60,he spent 40 and was left with 20.Then he withdrew 30 more and had 50,he spent 40 and was left with 10.Then he withdrew 30 more and had 40,he spent 40 and was left with 0 meaning he had no money

3 0
3 years ago
What is the answer to this problem please3 3/8 - 5 1/2 =?
nexus9112 [7]

Answer:

-2 1/8

Step-by-step explanation:

5 0
3 years ago
Put it into greatest and least
Vilka [71]

Answer:

3, 1, 2

hope this helps

have a good day :)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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