Verified Answer :

let oil change be x
91 / 7 = x / 11
(91 11) / 7 = x
13 11 = x
143 = x Ans

calculista

Answer:

\(143\ oil\ changes\)

Step-by-step explanation:

we know that

Frances can complete \(91\) oil changes in \(7\) days

so

by proportion

Find how many oil changes complete in \(11\) days

\(\frac{91}{7}\frac{oil\ changes}{days} =\frac{x}{11}\frac{oil\ changes}{days}\\ \\x=11*91/7\\ \\x=143\ oil\ changes\)

Related Questions