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Evgesh-ka [11]
2 years ago
10

Select all ratios equivalent to 30:6

Mathematics
1 answer:
Korolek [52]2 years ago
3 0

Answer:

60 : 12

90 : 18

120 : 24

150 : 30

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Find the value of each variable.
Harrizon [31]

Step-by-step explanation:

b is per the identity of angles on parallel lines when intersected by one inclined line the same as the 40° angle.

so,

b = 40°

due to the parallel nature of the 2 lines there is a symmetry effect for such shapes inscribed a circle. the upper and the lower triangle must be similar. and when applying a vertical line through the central crossing point, everything to the left is mirrored by everything on the right.

so, angle c must be equal to angle b.

c = 40°

and as the sum of all angles in a triangle is always 180°, d is then

d = 180 - 40 - 40 = 100°

the interior angle of the arc angle a is the supplementary angle of d (together they are 180°), because together with d they cover the full down side of the top-left to bottom-right line.

interior angle to a = 180 - 100 = 80°

due to the symmetry again, the arc angle opposite to a is the same as a.

as we know, the interior angle to a pair of opposing arc angles is the mean value of the 2 angles.

so, we have

(a + a)/2 = 80

2a/2 = 80

a = 80°

there might (and actually should) be some more direct approaches for "a" out of the other pieces of information, but that was the most straight one right out of my mind, and I don't spend time on finding additional shortcuts, when I have already a working approach.

8 0
1 year ago
At this point I’m just gonna post all the questions so stay online. y’all are so smart. 2 more to go! Xoxo <3
spayn [35]

Answer:172.5

Step-by-step explanation:Xoxo

8 0
3 years ago
A test was marked out of 80. A boy scored 60% of the marks on the test. How many marks did he score?
cricket20 [7]
He score 48 marks.

This can be found by simply multiplying 80 by 60% (0.6). This will give you your rinal answer of 48.

I hope this helps!
7 0
3 years ago
Find the vertex of the graph of the following quadratic equations y= -3x^2 -12x-13
choli [55]
By using the rule -b/2a —> 12/-6= -2
3 0
3 years ago
Read 2 more answers
the temperature changed from 5 degrees Celsius 6pm to -2 degrees Celsius at midnight. How much did the temperature decrease?
telo118 [61]
7 degrees Celsius because to go from 5 to -2 you would subtract 7 so it’s 7.
5 0
2 years ago
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