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Scrat [10]
3 years ago
6

The circle has radius 21 centimeters. What is its area?

Mathematics
1 answer:
faltersainse [42]3 years ago
8 0

Answer:

C. 1386

Step-by-step explanation:

For this one all you have to do is plug it in to the area equation for a circle which is A = pir

- A = 22/7 (21) = 1386

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Points A, B, and C are collinear and AB:AC=2:5. Point A is located at (-3,-4), point B is located at (m,n) and point C is locate
patriot [66]

Answer:

m = -11/7

n = -8/7

Step-by-step explanation:

Here, what we want to calculate is the coordinates of the point B

Let’s consider the straight line as A B C

we can see that actually, the point B divides the line into the ratio 2:5 since AB:AC is 2:5

Thus, by using the internal division formula (section formula) with the ratio of division, we can get the coordinates of point B

Mathematically, the formula for internal division is given as follows;

B = ( (mx2 + nx1) /m + n , (my2 + ny1)/( m + n))

From the question;

m:n = 2:5

Thus m = 2, n = 5

(x1,y1) are coordinates of A

x1 = -3 , y1 = -4

(x2, y2) are coordinates of C

x2 = 2 , y2 = 6

Thus, substituting these values into the equation we have;

B ={ 2(2) + 5(-3)}/(2+5) , {2(6) + 5(-4)}/(2+5)

B = (-11/7, -8/7)

6 0
3 years ago
If a student had homework 87 days out of 100 what fraction and what percentage of days did the student not have homework? Give 2
Vlad [161]
Well 87 of 100 is
 
87/100 = 87% = .87
8 0
3 years ago
Read 2 more answers
If b2 + 2b − 24 = 0, and b < 0, what is the value of b?
Effectus [21]

Answer: b = -6, 4

Step-by-step explanation:

Convert into factored form :

(b+6)(b-4)

Then make one of the terms 0.

3 0
4 years ago
before the use of calculators, mathematicians developed and used detailed tables of values of the sine, cosine and tangent ratio
Debora [2.8K]

Answer:

the answer is  bc of my knowledge XD XD XD hahaha

Step-by-step explanation:

nbhgutfyctygvuhbijnk mjbguvyfccvguhbijnk bvf vhnjhbvtcdxtcrftygbhjnhbgvfctytguhb vgc

3 0
4 years ago
What is the x-intercepts of the graph of y = 12x-5x-2
hammer [34]
Y = 12x - 5x - 2

first simplify the equation by subtracting like terms (in this case):

12x - 5x = 7x

y = 7x - 2

Since you are finding the x, you must isolate the x. Do the opposite of PEMDAS.(Note: because there is a equal sign, what you do to one side, you do to the other)

y = 7x - 2

y (+2) = 7x - 2 (+2)
y + 2 = 7x
(y + 2)/7 = 7x/7

x = (y + 2)/7


x = (y + 2)/7 is your answer

hope this helps
8 0
4 years ago
Read 2 more answers
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