Answer:
7.5
Step-by-step explanation:
Answer:B *54 degrees*
Step-by-step explanation:
2x-10 + 1/2x + 20 = 180
add up like terms
2.5x + 10 = 180
subtract 10 from both sides
2.5x = 170
divide by 2.5 on both sides
x = 68
now plug in x to the (2x-10) expression [which will get you 126 degrees]
then subtract 180 - 126 to fine angle y. which should get you *54 degrees*
I give u the answers of first and second one.
thank you
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