7 times 4 =28 this is cuz there is seven days in a week and 7x4
Answer:

Step-by-step explanation:
We want to simplify:

Recall the Pythagorean Identity:

So:

Substitute:

Factor. We can use the difference of two squares pattern:

Cancel. Hence:

Answer:
Cost of selling price = $5.33 (Approx)
Step-by-step explanation:
Given:
Cost of price of cookie = $3 each
Number of cookies = 80
Damaged = 10%
Markup on cost = 60%
Find:
Cost of selling price
Computation:
Total cost of cookie = 80 × 3 = 240
Markup price = 240 + 240(60%)
Markup price = 384
Number of damage cookies = 80(10%) = 8
Remain cookies = 80 - 8 = 72
Cost of selling price = Markup price / Remain cookies
Cost of selling price = 384 / 72
Cost of selling price = $5.33 (Approx)
Answer:
Carlota is not correct
Step-by-step explanation:
A ratio represents relationship between of two or more things.
Ratio of minutes to gallons of water flowing through a garden hose 
Here,

Also,
It's given that an equivalent ratio of minutes to gallons is 
Now,

Therefore,
Carlota is not correct