1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Volgvan
3 years ago
5

I need help wit statistics

Mathematics
1 answer:
nadya68 [22]3 years ago
4 0

Answer:

??

Step-by-step explanation:

You might be interested in
What percent of the surface area of the ottoman is green not including the bottom .The radius of the ottoman is 22 in and the cu
max2010maxim [7]

Answer:

37%

Step-by-step explanation:

Surface area of a cylinder = πr² + 2πrh

With r = 22 and h = (6 + 10) = 16

Area = π * 22² + 2 * π * 22 * 16

Area = 1520.728 + 2211.968

Area = 3732.696 in²

Percentage of green = surface area of green ÷ total surface area

Surface area of green = 2πrh

Surface area of green = 2 * π * 22 * 10

Surface area of green = 1382.48

Percentage of green = 1382.48 / 3732.696 * 100%

Percentage of green = 37%

6 0
2 years ago
Y = x² + 7x - 5 Can be written in the form y = ( x + a )² + b. Find the value of a and the value of b.
Mamont248 [21]

Answer:

a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\

Step-by-step explanation:

y=x^2+7x-5\\\\=x^2+2*\dfrac{7}{2}*x +\dfrac{49}{4} -\dfrac{49}{4} -\dfrac{20}{4} \\\\=(x+\dfrac{7}{2} )^2+\dfrac{69}{4} \\\\a=\dfrac{7}{2} \\\\b=\dfrac{49}{4} \\

8 0
2 years ago
Can y'all help me with math I hate it
antoniya [11.8K]

Answer:

Step-by-step explanation:

the first one

6 0
3 years ago
Read 2 more answers
El área de un rectángulo es 675cm2, si el largo es 3 veces. ¿Cuáles son las dimensiones del rectángulo?
Gala2k [10]
The answer is 15 cm. Hope I could be of help! ; )
7 0
3 years ago
A radio telescope has a parabolic surface, as shown below.
krek1111 [17]
OK, so the graph is a parabola, with points x=0,y=0; x=6,y=-9; and x=12,y=0

Because the roots of the equation are 0 and 12, we know the formula is therefore of the form

y = ax(x - 12), for some a

So put in x = 6

-9 = 6a(-6)

9 = 36a

a = 1/4

So the parabola has a curve y = x(x-12) / 4, which can also be written y = 0.25x² - 3x

The gradient of this is dy/dx = 0.5x - 3

The key property of a parabolic dish is that it focuses radio waves travelling parallel to the y axis to a single point. So we should arrive at the same focal point no matter what point we chose to look at. So we can pick any point we like - e.g. the point x = 4, y = -8

Gradient of the parabolic mirror at x = 4 is -1

So the gradient of the normal to the mirror at x = 4 is therefore 1.

Radio waves initially travelling vertically downwards are reflected about the normal - which has a gradient of 1, so they're reflected so that they are travelling horizontally. So they arrive parallel to the y axis, and leave parallel to the x axis.

So the focal point is at y = -8, i.e. 1 metre above the back of the dish.
5 0
2 years ago
Other questions:
  • What is the slope of the equation y=5/4x-7/4?<br><br> A. -7<br> B. -7/4<br> C. 5/4<br> D. 5
    10·1 answer
  • I need help! is due today. ;An animal shelter houses only cats and dogs, and there are 25% more cats than dogs. If there are 40
    12·1 answer
  • A fisherman catches an average of 6 fish every 2 hours.
    10·1 answer
  • On a test of 80 problems, Bill got 75% of the problems correct.
    6·2 answers
  • How do you find the slope between (-9,10) and (-7,5)
    13·2 answers
  • Use a fraction strips to find some. Write your answer in simplest form 1/3+1/4
    8·2 answers
  • Multiply and simplify out theese brackets(X+1)(x+3)
    13·1 answer
  • How many four-letter codes can be made if no letter can be used twice?
    11·2 answers
  • Cp=Rs6250 loss%=4% find sp​
    9·1 answer
  • What is a reasonable product of 3 9/10 X 4 1/5
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!