If the radius of a circle is increased by 100%, then the area is increased by:(A)100% (B) 200% (C) 300% (D) 400% (E) none of these

Answers

Answer 1

Answer: $A_1=\pi r^2\n\nR=2r\ then\ A_2=\pi R^2\to A_2=\pi(2r)^2=4\pi r^2\n\nA_2-A_1=4\pi r^2-\pi r^2=3\pi r^2=3A_1\n\n3=300\%\n\nAnswer:(C).$

Answer 2

Answer:

hope this helps in the picture below :)

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What is the product of 6x – y and 2x – y + 2?A=8x2 – 4xy + 12x + y2 – 2y
B=12x2 – 8xy + 12x + y2 – 2y
C=8x2 + 4xy + 4x + y2 – 2y
D=12x2 + 8xy + 4x + y2 + 2y

Answers

Answer:

Option (B) is correct.

The product of 6x – y and 2x – y + 2 is $12x^2-8xy+12x+y^2-2y$

Step-by-step explanation:

Consider the given expressions 6x – y and 2x – y + 2

We have to find the product of the above two given expressions,

$(6x-y)(2x-y+2)$

multiply first term of first expression by each term of second expression and similarly second term of first expression by each term of second expression

$\Rightarrow 6x(2x-y+2)-y(2x-y+2)$

On solving, we get,

$\Rightarrow 12x^2-6xy+12x-2xy+y^2-2y$

Solving further by combining like term, we get,

$\Rightarrow 12x^2-8xy+12x+y^2-2y$

Thus, The product of 6x – y and 2x – y + 2 is $12x^2-8xy+12x+y^2-2y$

Hence, option (B) is correct.

What is the solution to the equation
-3D/

Answers

Answer:

thats not a question

Step-by-step explanation:

What is the y intercept of the line -9 + 3y= 18

Answers

Answer:

0,9

Step-by-step explanation:

Answer:

y=9

Step-by-step explanation:

In this equation you would add 9 to get the y on a side by itself that would get you 3y=27, then you would divide both sides by 3 and end up with your y-intercept to be 9.

Compute the requested average.Tim Worker wants to purchase an automobile warranty costing $856. If he chooses to make 12 equal payments, then in dollars and cents the average payment will be?

A. 14.02
B. 71.33
C. 71.34
D. 140.19

Answers

The average payment will be $856/12 = $71.33

Need help.
I 2x +1 I < -4

Answers

the absolute value of a number is always positive. Therefore you cannot have an absolute value equal to a negative number.

the answer would be "no solution"

$| 2x +1 | < -4\n x\in\emptyset$

Find the sum of the given polynomials.ax + by + c, 2ax - 3by + c, and by - c

3ax - by + c
3a + x - bc
3ax + by - cd
bx - 3bc + a

Answers

ax + by + c
2ax - 3by + c
by - c
3ax - by + c First Option.

You must align like terms before adding them. This is to ensure that there will be no confusion in getting the sum of the given polynomials.

If you would like to find the sum of the given polynomials, you can do this using the following steps:

ax + by + c + 2ax - 3by + c + by - c = ax + 2ax + by - 3by + by + c + c - c = 3ax - by + c

The correct result would be 3ax - by + c.

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