Plsss help me I will brainlest u this is due ASAP right now

15

Step-by-step explanation:

20+10=30, 30-15=15

15 points

Step-by-step explanation:

20 + (10) - 15  

= 30 - 15

= 15

Given that,

Four roommates share the cost of an apartment: rent, electricity, and gas. Rent costs $1200/month and gas costs $50/month. Each roommate pays $345/month.

To find,

The electric bill per month.

Solution,

Bill of each roommates = $1200+$500+E, E is electricity bill

Total bill = $345/month

Bill of each roommates = 4($1200+$500+E), E is electricity bill

ATQ,

4($1200+$500+E) = $345

So, the correct option is (c).