Step-by-step explanation:
if BC=AB
1/2× 6 × 6=18 cm^2
I'm not sure if this is right. .. I am also just a student probably of ur age
The answer of X will be equal (3)
Answer:
x = -2, y=1
Step-by-step explanation:
x-7y=-9---------------------equation 1
-x+8y=10-------------------equation 2
From equation 1, make x the subject of formula
x=7y-9----------------------equation 3
substituting x=7y-9 in equation 2,
-(7y-9)+8y=10
Expanding bracket
-7y+9+8y=10
Collecting like terms
8y-7y=10-9
y=1
substituting y=1 in 3
x=7(1)-9
x=7-9
x=-2
Well to find it add the numbers up because all together they equal 540 degrees then subtract 540 to the number it add up to.