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
diamong [38]
4 years ago
13

Help me to solve this question plez!!

Mathematics
1 answer:
dimaraw [331]4 years ago
6 0

Let  First Sphere be the Original Sphere

its Radius be : r

We know that Surface Area of the Sphere is : 4π × (radius)²

⇒ Surface Area of the Original Sphere = 4πr²

Given : The Radius of Original Sphere is Doubled

Let the Sphere whose Radius is Doubled be New Sphere

⇒ Surface of the New Sphere = 4π × (2r)² = 4π × 4 × r²

But we know that : 4πr² is the Surface Area of Original Sphere

⇒ Surface of the New Sphere =  4 × Original Sphere

⇒ If the Radius the Sphere is Doubled, the Surface Area would be enlarged by factor : 4

You might be interested in
This year the fifth grade collected 216 fewer plastic containers than the fourth grade.How many plastic containers did the fifth
kap26 [50]

Let number of plastic containers collected by fourth grade= x

Then number of plastic containers collected by fifth grade students=x-216

OR

If number of plastic container collected by fifth grade is y

then number of plastic container collected by fourth grade=y+216

So, we can write it as follows

⇒ number of plastic containers collected by fourth grade= number of plastic containers collected by fifth grade +216



7 0
3 years ago
The sum of two numbers is 9.9, and the sum of the squares of the numbers is 53.21. What are the numbers?
Snezhnost [94]

Answer:

There are two possibilities:

x_{1} = 3.5 and y_{1} = 6.4

x_{2} = 6.4 and y_{2} = 3.5

Step-by-step explanation:

Mathematically speaking, the statement is equivalent to this 2-variable non-linear system:

x + y = 9.9

x^{2} + y^{2} = 53.21

First, x is cleared in the first equation:

x = 9.9 - y

Now, the variable is substituted in the second one:

(9.9-y)^{2} + y^{2} = 53.21

And some algebra is done in order to simplify the expression:

98.01-19.8\cdot y +2\cdot y^{2} = 53.21

2\cdot y^{2} -19.8\cdot y +44.8 = 0

Roots are found by means of the General Equation for Second-Order Polynomials:

y_{1} \approx \frac{32}{5} and y_{2} \approx \frac{7}{2}

There are two different values for x:

y = y_{1}

x_{1} = 9.9-6.4

x_{1} = 3.5

y = y_{2}

x_{2} = 9.9 - 3.5

x_{2} = 6.4

There are two possibilities:

x_{1} = 3.5 and y_{1} = 6.4

x_{2} = 6.4 and y_{2} = 3.5

5 0
3 years ago
Help with the linear equations
IgorC [24]

Answer:

y \: intercept =  - 1 \frac{1}{2}

Step-by-step explanation:

The y intercept form for the equation of a line is

y = mx + c

You should note that <em>c</em> represents the y-intercept of the line (where the line touches the y-axis)

y = mx + c \\ \\ we \:were\: given \:the \:equation \:y = x - \frac{3}{2} \\ \\ therefore \: the\: value \:of \:c \:is\: - \frac{3}{2} \:or -1 \frac {1}{2}

7 0
2 years ago
Which of the following statements is false? -(-5) = 5 |-5| = -5 -|-5| = -5 -|5| = -5
TiliK225 [7]

Your question has been heard loud and clear.

Well -(-5)=5

5/-5/= -5

/-5/5= -5

So basically , the statement is false because   -5(-5) not equal to -5/-5/

Thank you

3 0
4 years ago
Read 2 more answers
HELP PLEASE! 49 POINTS!<br><br><br> show work!!!!!!
Anna11 [10]

Answer:

1. y = 2/3 x +2

2.  y = -x -8

Step-by-step explanation:

The slope intercept form of a line is y = mx+b where m is the slope and b is the y intercept

1. y = 2/3 x +2

2.  y = -x -8

3 0
3 years ago
Read 2 more answers
Other questions:
  • Opinions Please! I take a lot of notes in school, just like everybody else. (mostly in math, bio, and eng) Im looking for a good
    5·2 answers
  • The sum of four consecutive odd integers is 216.find the four integer.
    13·2 answers
  • Which is a solution to the equation?<br> (х-2)(х + 5) = 18?
    6·1 answer
  • Who likes factoring polynomials?
    14·1 answer
  • Can anyone please help me with this. It’s late and I need help asap :)
    14·2 answers
  • HELP PLZZZZZZZZZZZZZZ
    11·1 answer
  • What is the slope of the line on the graph?<br><br> Enter your answer in the box.
    11·2 answers
  • .........................
    13·2 answers
  • PLZ HELP THIS IS OVER DUE MY MOM IS SO MAD
    12·1 answer
  • What is m⦟BCD? Enter your answer in the box.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!