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3 years ago

Lilys car has a fuel efficiency of 8 liters per 100 kilometers.

Mathematics

2 answers:

zavuch27 [327]3 years ago

8 0

100 : 8 = 12.5

12.5 Km per liter is your answer

marin [14]3 years ago

7 0

Answer:

12.5 km per liter.

Step-by-step explanation:

We have been given that Lily's car has a fuel efficiency of 8 liters per 100 kilometers. We are asked to find fuel efficiency of Lily's car in kilometers per liter.

$\text{Fuel efficiency}=\frac{\text{Total distance traveled}}{\text{Total fuel}}$

$\text{Fuel efficiency}=\frac{\text{100 km}}{\text{8 liters}}$

$\text{Fuel efficiency}=\frac{\text{12.5 km}}{\text{liter}}$

Therefore, fuel efficiency of Lily's car is 12.5 km per liter.

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3 years ago

Express the area of the rectangle in term of x

aalyn [17]

Answer:

Area = $12-\frac{4}{35}x$

Step-by-step explanation:

Length of the given rectangle 'l' = (15 - $\frac{1}{7}x$ )

Width of the given rectangle 'w' = $\frac{4}{5}$

Area of the rectangle = lw

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3 years ago

She worked a total of 15 hours. If she makes $15 per hour tutoring and $9 per hour at the grocery store and made a total of $159

Ugo [173]

Answer:

11 hours she worked at the grocery store

Step-by-step explanation:

assuming,

the number of hours worked at tutoring = x

the number of hours worked at grocery store = y

which means,

the amount she made at tutoring = x* $15

the amount she made at grocery store = y*$9

we have 2 equations

total number of hours

1) x+y= 15

total amount she earned

2) x* $15+ y* $9= $159

From equation 1

x+y= 15

x=15-y

we replace this x value in equation 2

x* $15+ y* $9= $159

(15-y)* $15+ y* $9= $159

(15*15)- 15y+9y=159

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225-159=6y

66=6y

66/6=y

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we place y=11 in our derived x equation

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