Find the number of pens they need to sell to break even (when R = C).

R=10x

C=2x+7000

P=R-C

a)

Substitute R and C into the equation for P:

P=10x - (2x+7000)

Now substitute 1000 for x and solve for P which is the company's profit if they sell 1000 pens.

b)

Set R equal to C

R=C

Plug in R=10x and C=2x+7000

10x=2x+7000

Solve for x which will be the amount of pens required to be sold to break even.

Step-by-step explanation:

I had to think through.

I hope this helps you :)

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

0.6

39mph

step-by-step explanation: