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3 years ago

The diameter of a circle is 4 centimeters,what is the area of that circle

Mathematics

1 answer:

avanturin [10]3 years ago

4 0

Area of circle = πr²

Area of circle = π(4÷2)² = 12.57 cm²

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Can someone please help me? I'm on my way to school rn!! (3x)9=(x+2)5

cluponka [151]

hello

(3x)9=(x+2)5

27x =5x +10

27x-5x =10

22x = 10

x=10/22

x= 5/11

7 0

4 years ago

Read 2 more answers

Estimate show how you estimated 412 divided by 97

nataly862011 [7]

the division of 412 divided by 97 can be estimated as:

412 can be estimated as: 400
97 can be estimated to 100

so, now on dividing 400/100 we get, the answer as 4.

To verify the estimation: when 412 is divided by 97, the answer is 4.24 which can be nearly written as 4 only.

Thus, our estimation was correct.

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4 years ago

Write the equation of the line in slope-intercept form. slope = -6; passes through (–1, –8) Your answer:

Tamiku [17]

y=-6x-15

hope it helps : )

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3 years ago

What is the difference between an inequality and an equation?

pshichka [43]

Hello there here is your answer!

An equation is a expression that contains an equals sign. (=) An inequality is a expression that contains inequality signs ().

Hope this helps! If so, mark me brainliest please!

5 0

3 years ago

A circle has its center at the origin, and (5, -12) is a point on the circle. How long is the radius of the circle?

Amanda [17]

Option C

The radius of circle is 13 units

Solution:

The equation of circle is given by formula:

$(x-h)^2+(y-k)^2 = r^2$

Where, the center being at the point (h, k) and the radius being "r"

Given that circle has its center at the origin

(h, k) = (0, 0)

(5, -12) is a point on the circle

(x, y) = (5, 12)

Substituting in equation we get,

$(5-0)^2+(12-0)^2 = r^2\\\\5^2+12^2 = r^2\\\\r^2 = 5^2+12^2\\\\r^2 = 25 + 144\\\\r^2 = 169\\\\Taking\ square\ root\ on\ both\ sides\\\\r = \sqrt{169}\\\\r = \pm 13\\\\Since\ radius\ cannot\ be\ negative\ ignore\ r = -13\\\\Thus\ the\ solution\ is:\\\\ \r = 13$

Thus radius of circle is 13 units

4 0

4 years ago