Please help due today Prove the sum of two rational numbers is rational where a, b, c, and d are integers and b and d cannot be zero.

the answer is  multiply to get the common denominator my question ask the exact opposite and i already have that answered for me.  

Step-by-step explanation:

step-by-step explanation: noo

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950