What does a equal?

(don’t just give the answer pls explain)

hi <3

okay so there are a few rules you need to be aware of first:

- angles in a triangle sum to 180

- angles on a straight line sum to 180

so first, lets find the missing angle of the triangle:

180 - 80 - (a - 5) = 105 - a

now lets form an equation because we know that 180 subtract this angle equals 2a:

180 - (105 - a) = 2a

75 + a = 2a

subtract a from both sides:

a = 75

hope this helps :)

the sum of two interior opposite angel is equal to the exterior angel

step-by-step explanation:

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is           symmetric about the line y = 120,000.

step-by-step explanation:

given that megan owns a clothing boutique.

the profits of 2010, 11, are recorded and shown as follows:

years since     2010 0     1     2     3       4       5

profits made in 1000's   39       84     111     120   111     84

we find that profit gradually increases form 2010 to 2013 upto 120,   then starts decreasing.

the profits for 2012 and 2014 are the same while that of 2011 and 2015 are also the same.

this shows that there is symmetry about the line profit = 120000

hence answer is:

a.   since the profit made in 2012 is equal to the profit made in 2014, the profit is           symmetric about the line y = 120,000.

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