Let cost of Emma's phone = x
Given that cost of Sophie's phone = 640
Then ratio of their phones cost will be x:640 or x/640
Given that ratio of their phones cost is 7:8 or 7/8
So both ratios will be equal.
x=560
So the new ratio of the cost of their phones will be 560:640
Now we have to find about how much should the prices of their phones decrease in order to have a ratio of 9:11.
So let that decreased amount is k then we will get equation :
11(560-k)=9(640-k)
6160-11k=5760-9k
6160-5760=11k-9k
400=2k
200=k
Hence final answer is prices of their phones should decrease by 200 in order to have a ratio of 9:11.
<em>Hello Person!!</em>
<em>The answer is below!!</em>
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Step-by-step explanation:
representing the number of lawns mowed.
y representing the number of dogs walked.
They need at least $1975 means less than or equal to 1975.
Hence,
<em>But, Mostly it's </em><em />
<em>P.S </em><em>Tell me if this is wrong....</em>
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