The sum of the first four terms of a geometric series is 203, and the common ratio is 0.4. find the first term

The first term of the series is 125.

Step-by-step explanation:

The sum of the first four terms of a geometric series can be described by the following equation:

Where x1 is the first term and r is the common ratio. Replacing the given values into the equation to solve for x1 yields:

The first term of the series is 125.

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

if you was gonna solve for a, a is a   < -12