Cookies are on sale! today each cookie costs $ 0 . 7 5 $0.75 less than the normal price. right now if you buy 7 7 of them it will only cost you $ 2 . 8 0 $2.80! write an equation to determine the normal price of each cookie ( c ) (c). find the normal price of each cookie.

Hence, the normal price of each cookie= $ 1.15.

Step-by-step explanation:

Cookies are on sale!

Today each cookie costs  $0.75  less than the normal price.

So let c be the normal price of one cookie.

Hence, today 1 cookie will cost= $ (c-0.75)

Right now if you buy  7 of them it will only cost you $2.80!

Hence,

cost of 7 cookie= 7×(c-0.75)

This means that:

7×(c-0.75)=2.80

i.e.   7c-7×0.75=2.80

⇒    7c-5.25=2.80

⇒   7c=0.80+5.25

⇒  7c=8.05

dividing both side by 7 we get:

c=1.15

Hence, the normal price of each cookie= $ 1.15.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest