HELP ME PLEASE
marina goes to the shop to buy loaves of bread and cakes. one loaf of bread costs 60 cents and one cake coasts 80 cents.
she buys x loaves of bread and y cakes
a. she must not spend more than $12
show that 3x + 4y ≤60
b. the number of loaves of bread must be greater than or equal to the number of cakes. write down an inequality in x and y to show this information.
please someone explain this to me step by step ​

Respuesta :

a. 60x + 80y ≤ 12

convert the cents to dollars

0.6x + 0.8y ≤ 12

0.2(3x + 4y) ≤ 12

3x + 4y ≤ 12 ÷ 0.2

3x + 4y ≤ 60

b. x ≥ y