C/a is the amount they bought so it would be 0.99*c or .99 times the amount they bought same goes to .79a
Answer:
2.7 cm
Step-by-step explanation:
subtract DC from EC
Step-by-step explanation:
We need to solve 5x+10=25 ....(1)
Step 1.
Subtract 10 to both sides of the above equation.
5x+10-10=25-10
5x=15
Step 2,
Divide each side by 5.

If we want to check whether it is correct or not, step are as follows :
Put x = 3 in equation (1)
5(3)+10=15+10
=25
It means that the above steps are correct.
7.40 should be what you are looking for.
Step-by-step explanation:
-9/13 + -6/13
(-9 - 6)/ 13
= -15/13
hope it helps ya