Answer:
x is 66 degrees
Step-by-step explanation:
since its a isosceles, two of the angles should be the same.
If is -(-13/12) then A. -13/-12
If is -13/12 then B. 13/-12

75x + 90(15-x)=88(15)
75x+1350-90x = 1320
-15x + 1350 = 1320
-15x= -30
x=2
the amount of 75 octane is 2 gallons
the amount of 90 octane is 13 gallons
Hope this helps.
Answer:
x=6,y=7
Step-by-step explanation:
In a coordinate pair it is assumed that the first number is x, and the 2nd is y.