The four rectangles shown have different side lengths.

which pair of rectangles has equal perimeters?

a.
a and c

b.
b and d

c.
b and c

d.
a and d

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

it would open into a square depending on the type of envelope i’m not sure about the second part