<h2>
Answer:</h2>
Cost of 1 cup of coffee=$ 1.4
and cost of 1 donut= $ 0.9
<h2>
Step-by-step explanation:</h2>
Let the cost of 1 cup of coffee is: $ x
and cost of 1 donut is: $ y
At joe's cafe 1 cup of coffee and 3 donuts is $4.10 and 2 cups of coffee and 2 donuts is $4.60.
i.e. we have:
x+3y=4.10
i.e. we have: x=4.10-3y---------(1)
and
2x+2y=4.60
Now, we put the value of x from equation (1) into this equation to get:
2(4.10-3y)+2y=4.60
2×4.10-6y+2y=4.60
⇒ 8.2-4y=4.60
⇒ 4y=8.2-4.60
⇒ 4y=3.6
⇒ y=3.6/4
⇒ y=0.9
and putting the value of y back in equation (1) we have:
x=4.10-3×0.9
⇒ x= 4.10-2.7
⇒ x=1.4
