All categories

3 years ago

50 POINTS FOR THIS QUESTION!!!

Mathematics

2 answers:

S_A_V [24]3 years ago

6 0

The answer is 4... i just had this.

Talja [164]3 years ago

3 0

Answer:

Step-by-step explanation:

Given is the graph bell shaped.

We have to find the variance of the data

We see that the graph looks like a normal distribution curve symmetrical about x=19

Hence mean =19

Since we know maximum area covered within 3 std deviations on either side of mean, we can calculate 6 sigma value from the graph

Extreme left x value = 14 and right = 24

Hence 6 times std dev =24-14 =10

So std deviation = 10/6 =5/3

Variance = 25/9

You might be interested in

The sum of consecutive integers 1,2,3,...,n is given by the formula 1/2n(n+1). How many consecutive integers, starting with 1, m

LuckyWell [14K]

1/2 * n * (n+1) = 1081

distribute

1/2 n^2 +1/2n -1081=0

factor out 1/2

1/2 (n^2 +n -2162) =0

multiply each side by 2

(n^2 +n -2162) =0

factor

(n-46) (n+47) =0

n=46, n=-47

n cannot be negative

n=46

Answer 46

7 0

3 years ago

It takes Sofia c minutes to cycle from the library to the mall.It takes 1/8 of the time cycling to travel the same distance walk

Mamont248 [21]

Answer:
Equation: w = (1/8) c
c at w = 44 minutes is 352 minutes

Explanation:
We are given that:
1- Time taken to cycle from library to mall is c minutes
2- Time taken to walk from library to mall is w minutes
3- Time taken to walk = 1/8 time taken to cylcle
Therefore:
w = (1/8) c
Now, we want to find c if w = 44 minutes
All we do is substitute with the w in the equation and get c as follows:
w = (1/8) c
44 = (1/8) c
c = 44*8 = 352 minutes

Hope this helps :)

6 0

4 years ago

Svet_ta [14]

Answer:

108π

Step-by-step explanation:

1/3 × 9 × π × (6²)

1/3 × 9π6²

(1 × 9π6²) / 3

(6² × 9π) / 3

6² × 3π

36 × 3π

108π

7 0

3 years ago

Help with the his question

guajiro [1.7K]

Answer:

The variable is b books and the equation is gonna be 12b + 16 = 120

Step-by-step explanation:

5 0

3 years ago

Simplify using PEMDAS<br>(3X + 2x)(3+4)

katrin [286]

Answer:

$5x*7$

Step-by-step explanation:

We know that PEMDAS is a shortened acronym for the order in which we do operations in an expression, which is as following in the correct order:

Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction.

Now your question asks you to solve the expression using PEMDAS, however that is what we would do regardless as <em>in algebra </em>PEMDAS is always in effect.

Lets break it down! $(3x+2x)*(3+4)$

Simple enough! We just do the respective operations inside the parenthesis first (as per pemdas), which after completion yields us

$5x*7$

Since x is undefined and the expression is completely simplified, there is nothing more we can do.

8 0

3 years ago