1.)which of the following is an irrational number?
6.444.....
21/square root(16)
5π/π **** btw these are pi signs π <---
square root of 50.
2.) 24 of the jackets for sale at a clothing store are blue. If this represents 15% of all jackets in the store, how many jackets are not blue.
76
85****
136
160
These are my last questions and if they are wrong im really sorry im not the best at math.
#1
√50 = √25*√2 = 5√2 , which is irrational
your choice : 5π/π = 5 , which is a whole number
#2.
total number ---- x
.15x = 24
x = 24/.15 = 160
of those 24 are blue, thus 136 are NOT blue
Vigicrues : Carte de vigilance crues nationale
No problem! I can help you with these questions.
1.) To determine which of the following numbers is irrational, let's first understand what an irrational number is. An irrational number cannot be expressed as a fraction of integers and cannot be represented as a terminating or repeating decimal.
a) 6.444...: This number is a repeating decimal. Although it is not given if it repeats indefinitely or if there is a pattern, we can still express it as a fraction: 6.444... = 6444.../1000. Hence, it is not an irrational number.
b) 21/square root(16): We can simplify the expression. The square root of 16 is 4. So, 21/4 = 5.25. This is also not an irrational number since it can be expressed as a terminating decimal.
c) 5π/π: Here, the π's cancel out, leaving us with 5. This is not an irrational number as it can be expressed as a whole number.
d) square root of 50: To determine if this is irrational, we need to simplify it further. The square root of 50 can be simplified as the square root of 25 multiplied by the square root of 2, which is 5√2. This is indeed an irrational number since it cannot be expressed as a fraction or a terminating decimal.
Therefore, the correct answer is the square root of 50.
2.) To determine how many jackets are not blue, we need to find the total number of jackets in the store. Let's use algebra to solve this problem.
Let's represent the total number of jackets in the store as "x".
We are given that 24 jackets are blue, which represents 15% of the total jackets. We can set up the equation:
24 = 0.15x
To find "x", we can divide both sides of the equation by 0.15:
x = 24/0.15 = 160
Therefore, the total number of jackets in the store is 160. To find how many jackets are not blue, we subtract the number of blue jackets from the total:
Total jackets - Blue jackets = 160 - 24 = 136
So, the correct answer is 136 jackets.