34.5=4h+7c
(34.5-7c)/4=h
Put h= (34.5-7c)/4 into another equation
30.5=8h+3c
30.5=2(34.5-7c)+3c
30.5=69-14c+3c
11c=38.5
c=38.5/11
Put c=38.5/11 into one of the equations
to calculate the h.
Answer: 4/15 of the movie
Step-by-step explanation:
In the morning, Charlie watched ¹/₃ of a movie. He then watched some more at night.
At the end of the day, he still had ²/₅ of the movie to watch.
The proportions of an item must always add up to one. This means that if you added the 1/3 to the 2/5 and then to the fraction Charlie watch at night, they should add up to one.
¹/₃ + ²/₅ + x = 1
x = 1 - ¹/₃ - ²/₅
We can divide 143.50 by 7. This gives us 20.5. This means that she works 20.5 hours a week or 21 hours if you round up.
The population density of the city which is the ratio of population size and the land area is 1419 people per square mile.
- The initial population = 2496435
- The percentage increase in population = 7.9%
<u>The population of the city on 2015 can be calculated thus</u> :
- (1 + percent increase) × initial population
- (1 + 0.079) × 2496435 = 2693653.365 people
<u>The population of a city is calculated using the relation</u> :
- Population density = Population / Land Area
- Population density = 2693653.365/1898
- Population density = 1419.21
Therefore, the population density is 1419 people per square mile.
Learn more: brainly.com/question/18796573
Answer:
D
Step-by-step explanation:
