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3 years ago

If the radius of a circle is increased by 100%, then the area is increased by:

1 answer:

5 0

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

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A gym employee is paid monthly. After working for three months, he had earned $4,500. To

Leto [7]

Answer:

$9000

Step-by-step explanation:

A gym employee has earned in 3 months =$4500

Then his monthly salary =$4500/3 =$1500

After six months he will earn = 6 × his monthly salary

= 6×$1500=$9000

5 0

3 years ago

Solve for x if the Perimeter = 26 14-2x 2x + 1 3x - 1

sergejj [24]

Answer:

x = 4

Step-by-step explanation:

Perimeter of triangle = sum of all sides

Side 1: 14 - 2x

Side 2: 3x - 1

Side 3: 2x + 1

Perimeter= side 1 + side 2 + side 3

26 = 14 - 2x + 3x - 1 + 2x + 1

26 = 14 - 1 + 1 - 2x + 3x + 2x

26 = 14 + 3x

3x = 12

x = 12/3

x = 4

3 0

3 years ago

6. Evaluate /(x) = -4x - 5 for x = -1.

Stels [109]

Answer:

-1

Step-by-step explanation:

-4(-1)-5=4-5=-1

3 0

3 years ago

The graph of linear function k passes through the points (−3, 0) and (1, 8).

masya89 [10]

Answer:

i dont know

Step-by-step explanation:

4 0

2 years ago

The equation of a circle is given below.

BARSIC [14]

Given:

The equation of the circle is $x^2+(y+4)^2=64$

We need to determine the center and radius of the circle.

Center:

The general form of the equation of the circle is $(x-h)^2+(y-k)^2=r^2$

where (h,k) is the center of the circle and r is the radius.

Let us compare the general form of the equation of the circle with the given equation $x^2+(y+4)^2=64$ to determine the center.

The given equation can be written as,

$(x-0)^2+(y+4)^2=64$

Comparing the two equations, we get;

(h,k) = (0,-4)

Therefore, the center of the circle is (0,-4)

Radius:

Let us compare the general form of the equation of the circle with the given equation $x^2+(y+4)^2=64$ to determine the radius.

Hence, the given equation can be written as,

$x^2+(y+4)^2=8^2$

Comparing the two equation, we get;

$r^2=8^2$

$r=8$

Thus, the radius of the circle is 8

3 0

4 years ago