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emilie3849
19.05.2021 •
Mathematics
Find the value of x. (Type an integer or decimal.)
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Ответ:
70
Step-by-step explanation:
An angle formed by 2 tangent lines is equal to one half the measure of the major arc minus the measure of the minor arc.
we are given the minor arc ( 110 ) however we are not given the major arc.
Because circles make a 360 degree rotation we can find the major arc by subtracting the measure of the minor arc from 360
Thus, major arc = 360 - 110 = 250
Now that we have identified the major and minor arc we can find x
Recall that x = 1/2 ( major arc - minor arc )
Thus, x = 1/2 ( 250 - 110 )
250 - 110 = 140
140 / 2 = 70
Hence, x = 70
Ответ:
Andy = 5 hours
If they do it together, time needed = (3 x 5) / ( 3 + 5) = 15/8 = 1 7/8 hours.
1 7/8 hour