Answer:pretty sure its 10 degrees
Step-by-step explanation:
all tris add up to 180, and this one is a right angle so you know you have 90 deg, 80 degrees. 90+80=170; 180-170=10
Answer:
11/2
Step-by-step explanation:
you use the keep, change, flip method so this becomes 11/3 times 3/2 then multiply regularly
Answer:
67
Step-by-step explanation:
When two angles are complimentary, it means that, together, they make a 90 degree angle.
/_A + /_B must equal 90°
Answer:
540
Step-by-step explanation:
Amount of antifreeze in the 90% solution + amount of antifreeze in the 20% solution = amount of antifreeze in the 80% solution
0.90 x + 0.20 (90) = 0.80 (x + 90)
0.90 x + 18 = 0.80 x + 72
0.10 x = 54
x = 540
You need 540 gallons of 90% antifreeze solution.