The population of the country in 1990 is 249.5 million
<u>Step-by-step explanation</u>:
- Let 'x' be the population in 1990.
- The population in 2015 is 321.9 million.
The increase in x by 29% = 321.9
10^6
(since x is 100% and increase of 29% will be 129%)
129% of x = 321.9
10^6
1.29x = 321.9
10^6
x = 321.9
10^6/1.29
x = 249.5
10^6
x = 249.5 million.
∴ The population of the country in 1990 is 249.5 million
Answer:
2.5 miles per hour
Step-by-step explanation:
![\frac{1}{4}\times \frac{5}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D%5Ctimes%20%5Cfrac%7B5%7D%7B8%7D)
Step 1: Apply the fraction rule: ![\frac{a}{b}\times \frac{c}{d}=\frac{a\:\times \:c}{b\:\times \:d}](https://tex.z-dn.net/?f=%5Cfrac%7Ba%7D%7Bb%7D%5Ctimes%20%5Cfrac%7Bc%7D%7Bd%7D%3D%5Cfrac%7Ba%5C%3A%5Ctimes%20%5C%3Ac%7D%7Bb%5C%3A%5Ctimes%20%5C%3Ad%7D)
![\frac{1}{4}\times \frac{5}{8}=\frac{1\times \:5}{4\times \:8}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B4%7D%5Ctimes%20%5Cfrac%7B5%7D%7B8%7D%3D%5Cfrac%7B1%5Ctimes%20%5C%3A5%7D%7B4%5Ctimes%20%5C%3A8%7D)
Step 2: Set up the fraction
![\frac{5\times \:4}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B5%5Ctimes%20%5C%3A4%7D%7B8%7D)
- Cancel the numbers:
![\frac{4}{8}=\frac{1}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B8%7D%3D%5Cfrac%7B1%7D%7B2%7D)
![=\frac{5}{2}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B5%7D%7B2%7D)
- Convert to decimal
Therefore, Oscar's speed is 2.5 miles per hour.
Answer:
x=-2
Step-by-step explanation: :)
Answer:
6 black and white photos
9 color photos
Step-by-step explanation:
1. black and white photo = $3
2. color photo = $2
find number of each photo that will give you at least 12 photos
1. $3*6 = $18
2. $2*9 = $18
3. $36 = 15 photos (6 black and white, 9 color)
Answer:
y = -1/2x + 5
Step-by-step explanation:
Parallel slope = -1/2
The y-intercept can't be the same so C is the only option