What is the mean of the set {4, 6, 8, 10}?
2 answers:
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Answer:
5. x = 13
6. x = 11; y = 3
Step-by-step explanation:
5. (9x + 2)° = 119° (alternate interior angles are congruent)
Subtract 2 from each side
Divide both sides by 9
6. (9x + 25)° = (13x - 19)° (corresponding angles are congruent)
Collect like terms
Divide both sides by -4
(13x - 19)° + (17y + 5)° = 180° (linear pair)
Plug in the value of x and solve for y
Collect like terms
Subtract 129 from both sides
Divide both sides by 17