SOLUTION: There are 21 horses and cows on the farm. the number of cows is two times the number of horses. The number of horses is an odd number less than 10. How many horses are there? Ho

Question 595455: There are 21 horses and cows on the farm. the number of cows is two times the number of horses. The number of horses is an odd number less than 10. How many horses are there? How many cows are there?
Answer by math-vortex(648) (Show Source): You can put this solution on YOUR website!
there are 21 horses and cows on the farm. the number of cows is two times the number of horses. the number of horses is an odd number less than 10. how many horses are there? how many cows are there?
Hi, there--
.
You can solve this problem using a more formal algebra approach, or you can reason through it. I'll walk though it informally. IF you want a more formal algebra approach, email me and I'll edit my solution.
.
We know that the number of horses is an odd number less than 10. Our choices are 1, 3, 5, 7, or 9 horses.
.
We know that the number of cows is two times the number of horses. Our choices are 2, 6, 10, 14, and 18 cows.
.
Looking at the two lists, we can see that 7 horses and 14 cows add up to 21 horses and cows on the farm.
.
Hope this helps!
.
Mrs. Figgy
math.in.the.vortex@gmail.com
RELATED QUESTIONS
3 types of horses on a ranch, Arabians are 8 more than twice the number of Quarter... (answered by ikleyn)

I need help writing an algebraic expression. The problem gave me a riddle that I had to... (answered by josgarithmetic)

Write an expression to represent the total number of legs on h horses and c chickens.... (answered by Boreal)

A farm has 60 cows, pigs, and horses. There are 4 times as many cows and pigs as horses.... (answered by cuteminiming)

A farm has 60 cows,pigs, and horses. There are 4 times as many cows and pigs as horses. (answered by RAY100)

a farmer has 50 pigs and an unknown number of cows on his farm. write an expression for... (answered by ewatrrr)

A farmer has 60 cows, pigs, and horses. There are 4 times as many cows and pigs than... (answered by josmiceli)

In a farm. there are 78 more chickens than cows. Ke chi Morisato finds that the total... (answered by richwmiller)

In a farm, there are 78 more chickens than cows, Ke chi Morisato finds that the total... (answered by TimothyLamb)