Get a new one or ask someone to use theirs.
Solution:
we are given that
Each cow has 4 legs and each chicken has 2 legs.
A boy counts 42 heads and 144 feet.
we have been asked to find how many cows are there?
Let there are x cows and y chicken.
Then we can write

Hence Number of cows=30
Answer:
https://youtu.be/q4EBfXlFXjw
this is the link of a video that can help , I promise I'm not trolling , this an actual video , just copy paste it somewhere and it may be of help to you, it's to find the diameter from circumference.
Step-by-step explanation:
once the diameter has been found , half it , and you have your radius , then for area use the formula , A = pi r² , and you have you now found Radius , Diameter and Area.
2x + 39 = 77 is the equation trnaslated, thne you subtract 39 from both sides to get 2x = 38 then divide both sides by 2 to get x = 19. the number is 19
9-2(-3)+6= 9+6+6 Your answer should be 21 if I read your question correctly