need help finding rate Charlie\'s rate OOPS 67 HINT Remember that Dora can insta

Question

need help finding rate

Charlie's rate OOPS 67 HINT Remember that Dora can install 10 more shingles per hour than Charlie. If d equals Dora's rate, and c equals Charlie's rate, how can we write Dora's rate using the variable c? Then rewrite the equation, but instead of writing d for Dora's rate, write the equivalent expression that uses the variable c to describe Dora's rate. The result will be an equation with only one variable. Charlie's rate shingles per hour Please enter your answer as an integer, for example. 6 or -10. Submit My Answer You have 1 attempt to answer this question correctly Report an issue with this question

Explanation / Answer

150/ d = 130 / c

it says Dora can install 10 more shingles per hour than charlie

so we can write another equation as

d = c + 10

plugging this value of d into equation 1

150 / ( c+10) = 130/c

cross multiplying

150 c = 130 ( c+ 10 )

150 c = 130 c + 1300

20c = 1300

c = 65

so, charlie can install 65 shingles per hour

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