Remark
The way you have to set this up is to take the new number for the males and put it over the total for the males and females. The new number for the males / total = 3/5.
Step One
Find the total number of females
100 + 160 = 260 when 100 females have been added to the study.
Step Two
Find the number of males
The total number of males = 240 + x where x is the number of males to be added.
Step Three
Find the total for both
260 + 240 + x = Total
500 + x = Total.
Step Four
Find the ratio of males to total
(240 + x) / (500 + x) = 3/5
Step Five
Cross multiply and solve
(240 + x)*5 = (500+x)*3
1200 + 5x = 1500 + 3x Subtract 1200 from both sides.
5x = 1500 - 1200 + 3x
5x = 300 + 3x Subtract 3x from both sides.
5x - 3x = 300
2x = 300 Divide by 2
x = 300 / 2
x = 150
Check
(240 + 150 ) / (500 + 150) = ? 3/5
390 / 650 = ? 3/5
39/65 = ? 3/5 Divide the top and bottom on the left by 13
3/5 = 3/5 and it checks.
In approximately 10 years the oak tree population will be 50% of what it is. because 5 x 10 = 50. hope this helps :)
Answer: x = -3
set them equal to each other and reverse pemdas as shown in my image
You work x hours. you get 20 dollars per hour. this is a random situation, because u didn't give us choices.
Jasmine can run in one hour is 7.25 miles.
<h3>What is the formula of unitary method?</h3>
The formula of the unitary method is to find the value of a single unit and then multiply the value of a single unit to the number of units to get the necessary value.
Given that,
Jasmine can run 4
miles in 
of an hour.
of an hour = 4 miles
= 
miles
By using unitary method we will find the value of an hour.
1 hour = 
= × 
= 
1 hour = 7.25 miles
Hence, Jasmine can run in one hour is 7.25 miles.
To learn more about unitary method from the given link:
brainly.com/question/10673687
#SPJ4
