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lyudmila [28]
3 years ago
13

Write 9n + 1 in a word phrase 9n +1

Mathematics
1 answer:
Lisa [10]3 years ago
6 0

Answer:

<u>Sum</u><u> </u><u>o</u><u>f</u><u> </u><u>1</u><u> </u><u>a</u><u>n</u><u>d</u><u> </u><u>n</u><u>i</u><u>n</u><u>e</u><u>s</u><u> </u><u>t</u><u>i</u><u>m</u><u>e</u><u>s</u><u> </u><u>a</u><u> </u><u>n</u><u>u</u><u>m</u><u>b</u><u>e</u><u>r</u>

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Hello, I am currently very stuck with this problem and I am unsure as to how I would solve it.
borishaifa [10]

We have the equation

20y=x^2-10-15

Let's complete the square, to do it let's add and subtract 25 on the right side

\begin{gathered} 20y=x^2-10-15+25-25 \\  \\ 20y=(x-5)^2-15-25_{} \\  \\ 20y=(x-5)^2-40 \\  \\  \end{gathered}

Now we can have y in function of x

\begin{gathered} y=\frac{1}{20}(x-5)^2-2 \\  \\  \end{gathered}

Now we can already identify the vertex because it's in the vertex form:

y=a(x-h)+k

Where the vertex is

(h,k)

As we can see, h = 5 and k = -2, then the vertex is

(5,-2)

Now we can continue and find the focus, the focus is

\mleft(h,k+\frac{1}{4a}\mright)

We have a = 1/20, therefore

\begin{gathered} \mleft(5,-2+5\mright) \\  \\ (5,3) \end{gathered}

The focus is

(5,3)

And the last one, the directrix, it's

y=k-\frac{1}{4a}

Then

\begin{gathered} y=-2-5 \\  \\ y=-7 \end{gathered}

Hence the correct answer is: vertex (5, -2); focus (5, 3); directrix y = -7

5 0
1 year ago
NEED HELP!!!<br> What is angle EF?
jarptica [38.1K]

Answer:

diagonal

Step-by-step explanation:

8 0
4 years ago
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If a translation maps point (3, 2) to (5.3); or T:(3, 2) - (5, 3), indicate the image for (2, 4).
sergij07 [2.7K]

Answer:

(4,5)

Step-by-step explanation:

The x coordinate moves from 3 to 5 which is +2

The y coordinate moves from 2 to 3 which is +1

We move the point (2,4)

(2+2, 4+1) becomes (4,5)

7 0
3 years ago
Sharon divides a meatloaf into elevenths how many elevenths<br> equal the whole meatloaf
makkiz [27]
11 elevenths  equals the whole meat loafs 11/11=1
6 0
4 years ago
Solve for X<br> (Heres the picture of the problem)<br><br><br> Pls help I’m so clueless
Elan Coil [88]

Answer:

x=7

Step-by-step explanation:

4 *(4+x) = 2 * (2+20)

Distribute

16+4x =2*22

16+4x = 44

Subtract 16 from each side

16+4x-16 = 44-16

4x=28

Divide each side by 4

4x/4 =28/4

4 0
3 years ago
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