Supplementary means adds to 180
A+B=180
B=73
A+73=180
minus 73 both sides
A+73-73=180-73
A+0=107
A=107
A=107 degrees
5y=-10
Y=-2 it has one solution
Answer:
7 to the 4 power
Step-by-step explanation
count the number of sevens there are and that the exponent.
