Answer:
<em><u>D</u></em><em><u> </u></em><em><u>7</u></em><em><u>,</u></em><em><u> </u></em><em><u>-</u></em><em><u>1</u></em><em><u>2</u></em> is the answer hope this helps✌
(a+b)^7= a^7+ 7a^7b+ 21 a^6b²+ 35a^5b³+ 35 a⁴b⁴+ 21 a³b^5 + 7a²b^6 + b^7
Y=29
x+y+78=180
x+29+78=180
x=180-78-29
x=73
z=180-73
z=107
x=73 degrees
y=28 degrees
z=107 degrees
<span>13(10+2) = 13(12)....add those numbers in the ( )
answer: </span><span>13(12)</span>