A pet store sells puppies and kittens in the ratio 5 : 4 . If their sales of puppies and kittens combined came to 27, how many p
2 answers:
Answer:
15 puppies
Step-by-step explanation:
A pet store sells puppies and kittens in the ratio 5 : 4
As per the ratio, total puppies and kittens is 5+4= 9
If their sales of puppies and kittens combined came to 27
The ratio of puppies to the total is 5:9
LEt x be the puppies sold
RAtio of puppies sold to the total is x: 27
Now make a proportion using the ratio and solve for x
cross multiply it
Divide both sides by 9
x=15
S, 15 puppies
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Answer:
Step-by-step explanation:
It seems this system of equations would be solved easier using the elimination method (the x and y values are lined up).
Multiply everything in the first equation by -2 (we want the 4x to be able to cancel out with a -4x).
Now line up the equations (they are already lined up - convenient) and add them from top to bottom.
The -4x and 4x are opposites, so they cancel out.
Adding 6y and 2y gives you 8y, and adding -12 and 4 gives you -8.
Divide both sides by 8.
Since you have the y-value you can substitute this in to the second (or first equation, it doesn't necessarily matter) equation.
Simplify.
Add 2 to both sides.
Divide both sides by 4.
The final answer is .