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lakkis [162]
3 years ago
10

891 is 99% of what amount?

Mathematics
2 answers:
Hoochie [10]3 years ago
8 0
900! Have a great day! :D
vaieri [72.5K]3 years ago
6 0

Answer:

900

Step-by-step explanation:

Hope this helps!

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1. Write the equation in standard form. Identify the important features of the graph:
NeTakaya

Answer:

  1. (x-4.5)^2 +(y +5)^2 = 30.25
  2. x = (1/8)y^2 +(1/2)y +(1/2)
  3. y^2/36 -x^2/64 = 1
  4. x^2/16 +y^2/25 = 1

Step-by-step explanation:

1. Complete the square for both x and y by adding a constant equal to the square of half the linear term coefficient. Subtract 15, and rearrange to standard form.

  (x^2 -9x +4.5^2) +(y^2 +10y +5^2) = 4.5^2 +5^2 -15

  (x -4.5)^2 +(y +5)^2 = 30.25 . . . . . write in standard form

Important features: center = (4.5, -5); radius = 5.5.

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2. To put this in the form x=f(y), we need to add 8x, then divide by 8.

  x = (1/8)y^2 +(1/2)y +(1/2)

Important features: vertex = (0, -2); focus = (2, -2); horizontal compression factor = 1/8.

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3. We want y^2/a^2 -x^2/b^2 = 1 with a=36 and b=(36/(3/4)^2) = 64:

  y^2/36 -x^2/64 = 1

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4. In the form below, "a" is the semi-axis in the x-direction. Here, that is 8/2 = 4. "b" is the semi-axis in the y-direction, which is 5 in this case. We want x^2/a^2 +y^2/b^2 = 1 with a=4 and b=5.

  x^2/16 +b^2/25 = 1

_____

The first attachment shows the circle and parabola; the second shows the hyperbola and ellipse.

6 0
3 years ago
Solve for the missing elements. Show your work. Use 3.14 for pie 28 diameter​
aivan3 [116]

Answer:

Step-by-step explanation:

Good Question but i don't know

5 0
3 years ago
The difference of twice a number and 2 is<br> 40. Find the number.
IgorLugansk [536]

Answer:

answer = 21

Step-by-step explanation:

2n - 2 = 40

2n - 2 + 2 = 40 + 2

2n = 42

2n/2 = 42/2

n = 21

4 0
2 years ago
7÷9932 i need help with this and i have to show the work
Rashid [163]

Answer:

the answer is 7 over 9932!

Step-by-step explanation:


6 0
2 years ago
To drive to work, Dave has to drive 20 miles east and then 15 miles north. If there were a direct road going northeast, how many
suter [353]
By the Pythagorean theorem:

x= \sqrt{20^2+15^2}= \sqrt{400+225}= \sqrt{625}=25 \ miles

7 0
3 years ago
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