If three dozen cookies cost $9, what is the cost per cookie?

$0.25 is the cost per cookie

Step-by-step explanation:

Unit rate defined as the rate are expressed as a quantity as 1 such as 4 meter per second or 4 miles per hour

As per the statement:

If three dozen cookies cost $9.

Use conversion:

1 dozen = 12

then;

3 dozen = 36

then;

36 cookies cost $9.

Cost of cookies = $9

Number of cookies = 36

Then by unit rate definition we have;

⇒

Therefore, $0.25 is the cost per cookie

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

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