A triangle is 180 degrees. This means all the sides added up will be 180 degrees, so what you need to do is turn it into an algebra problem.
x + 4x + 15 + 2x - 10 = 180
Simplify.
7x + 5 = 180
Subtract 5 from both sides.
7x = 175
Divide by 7.
x = 25
4(25) - 10 = 20
This is a right angle, which means that C is the correct answer.
Answer from: Quest
for ex: the reciprocal of 3/4 is 4/3. it is the opposite.
reciprocal definition:
a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.
Answer from: Quest
Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.
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