60-12=4x
48=4x
x=12
Hope this helps.
Chris baked 95 cookies.
Step-by-step explanation:
Given,
Cookies baked by Haley = 50
Cookies baked by Chuck = 65
Cookies baked by Dana = 90
Average of them = 75
Let,
Cookies baked by Chris = x
Average = 

Multiplying both sides by 4

Chris baked 95 cookies.
Keywords: addition, average
Learn more about addition at:
#LearnwithBrainly
Answer:
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
Step-by-step explanation:
If a square contains 171 tiles you will need multiply 21 by 171 (171x21) which should give you the amount for the entire roof.
Hope this helps! :)
Answer:
A
Step-by-step explanation: