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Natalija [7]
3 years ago
8

Point O is the center of this circle, what is mBCA? A) 56 B) 62 C) 72 D) 76

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
4 0
Answer: B.) 62

sum of interior angles of quadrilateral = 360

lines DB and DA are tangent to the circle, so they're at a right angle to the lines OB and OA respectively. so to find mBOA = 360 - 56 - 90 - 90
so mBOA = 124

mBCA = (1/2)mBOA
mBCA = (1/2)(124)
mBCA = 62°
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Where on a coordinate graph are the first numbers before the dashes located?
Sauron [17]
Basiclly, we look at the 2 points below and find the distance between them, then we match

d=\sqrt{( x_{2} -x_{1} )^{2}+( y_{2}-y_{1} )^{2}}
when finding the distance between points (x1,y1) and (x2,y2)

if the x values, or y values are same, you don't need the distance formula, just use logic

(-10, 2) and (-2, 2)
the y value is the same so find the distance between the x values
from -10 to -2 is 8
8 matches with this one


(-3, -1) and (5, 1)
use distance formula
d=\sqrt{( 5-(-3) )^{2}+( 1-(-1) )^{2}}=√68


(-3, -2) and (1, 3)
input
d=\sqrt{( 1-(-3) )^{2}+(3-(-2))^{2}}=√41

(-3, -5) and (-2, -4)
input
d=\sqrt{( -2-(-3) )^{2}+( -4-(-5) )^{2}}=√2

(0, 0) and (5, 5)
input
d=\sqrt{( 5-0 )^{2}+( 5-0 )^{2}}=√50


(1, 2) and (1, -10)
x values are same so find distance between 2 and -10
answer is 12

(1, 2) and (5, 2)
y values are same
find distance between 1 and 5
answe ris 4


(2, 3) and (10, 9)
input
d=\sqrt{( 10-2 )^{2}+(9-3)^{2}}=10





ANSWERS (because the spacing has gone wierd)                                                           
(-10, 2) and (-2, 2)=8           
(-3, -1) and (5, 1)=√68             
(-3, -2) and (1, 3)=√41                       
(-3, -5) and (-2, -4)=√2             
(0, 0) and (5, 5)=√50             
(1, 2) and (1, -10)=12             
(1, 2) and (5, 2)=4               
(2, 3) and (10, 9)=10 

8 0
3 years ago
Is there a simplier way for me to answer these question. This is an algebra class on line and I can't communicate with the instr
AveGali [126]

<u>Answer:</u>

The easiest way is to open your book and study the material.

<u>Step-by-step explanation:</u>

First, find a nice quite place.

Second, open the book.

Third, study you chapters.

Forth, bang head and ask questions on Math forums like Brainly

Fifth, study study study. Math is a contact sport so study every chance you get.

Sixth, close book and get a good night sleep. Sleep is very important.

3 0
4 years ago
Please help :( Calculate each mountain path grade to the nearest percent.
wariber [46]
The grade of the path in the mountain is calculated by determining first the ratio between the rise over the run and multiplying the ratio by 100%. 

For Path A: 

                 grade = (rise / run) x 100%
                 grade = (1414/ 3535) x 100% = 40%

<em>Answer: 40%</em>

For Path B:
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Answer: 19.36%
                 
8 0
3 years ago
Need help please!!!
katrin2010 [14]

Answer:

1. (A)

2.(C)

3. (C)

4 0
3 years ago
Please help! Please explain and actually help!
stealth61 [152]

Answer:

17

Step-by-step explanation:

According to the Pythagorean theorem, a^2+b^2=c^2, where a and b are the two legs of a right triangle, and c is the hypotenuse. In this scenario, the two legs are 8 and 15, and we are asked to find the hypotenuse. Plugging the two values in, we have 64+225=c^2, where 64 is 8 squared and 225 is 15 squared. Adding, we have the two values as 289. If you don't know your squares, I suggest you take a look at a list or even memorize your squares until 30, but 289 is actually 17 squared. If c^2=289, then c = \sqrt{289}, which is 17.

7 0
3 years ago
Read 2 more answers
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