by the use of elimination method
make all coefficients of subject to be eliminated similar..by multiplying the coefficients with one another
for eqn(i)
5(-10y+9x=-9)
-50y+45x=-45
for eqn(ii)
9(10y+5x=-5)
90y+45x=-45
-50y+45x=-45
90y+45x=-45
...subtract each set from the other...
we get
-140y+0=0
y=0
from eqn(i)
10y+5x=-5
0+5x=-5
x= -1
Answer:
70
Step-by-step explanation:
65 and 45 make up 110, and triangles are composed up 180°. The missing angle thatll make it add up to 180 is 70
The answer is
-5/8+9/2=3 7/8 or 31/8
so you should put 31 in the green box
What is 100% of the mass ?
