All exterior angles add up to 360 degrees so we have 360-121-144=95 so our final answer is 95o
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we plug in a,b,c to get 3*3-4*4+2*5 and simplified we have 9-16+10 we solve thta 9-16=-7 and 10+-7=10-7=3 so our final answer is 3
so have the equaiton 2*(6x-4)=76 so 6x-4=38 and 6x=42 so x=7 and we do (76-7*2)/2=31 so the dimensions are (D)7,31.
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I do AMC8
Which classes do you go to on AOPS because these look like AOPS homework well anyways I'll help
so he rides at 15*5280 feet per hour and there are 3600 seconds in an hour so we ahve the equation 15*5280/3600 feet per second=22 feet per second.
well the negtive and positive cancel out to become (2^-1)/(2^1)= (1/2)/2=4 so our final answer is 4
we find that the triangles made with 2 pieces is the same area as the square so the area is (10*2)^2/5=20^2/5=400/5=80
140/360*18*18π where 140/360*18=7 so it is 7*18π=126π