Solve for x a 12, b -10 ,c -12 ,d 12

Step-by-step explanation:

Remember that The sum of the interior angles of a triangle is two right angles ( 90 + 90 ) or 180 . Create an equation:

In the question, we are asked to find the value of x.

Now , Add the numbers : 60 and 40

Move 100 to RHS ( Right Hand Side ) and change it's sign

Subtract 100 from 180

Divide both sides by 8

The value of x is 10

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she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!

faster, im not sure why but i know it is faster