Plz answer quickly, also btw only c and d

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

The green family is a family of six people. they have used 4,885.78 gallons of water so far this month. they cannot exceed 9,750.05 gallons per month during drought season. write an inequality to show how much water just one member of the family can use for the remainder of the month, assuming each family member uses the same amount of water every month.

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq