A man bought four cups of coffee and left a $7 tip. A woman bought eight cups of coffee and only left a $2 tip. If they paid the same amount, how much was each cup
of coffee?
a. $1.10
b. $2.25
c. $0.75
D.1.25

8c + 2 = 4c + 7

8c - 4c = 7 - 2

4c = 5

c = 5/4

c = $1.25

Each cup of coffee was $1.25

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → 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