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3 years ago

PLZZZZZZZZZZZZZZZ HELPPPPPPPPPPPPPPP

Mathematics

1 answer:

hoa [83]3 years ago

6 0

Answer:

OOF I MEANT A

Step-by-step explanation:

Michelle is in less debt than John

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Although bats are not known for their eyesight, they are able to locate prey (mainly insects) by emitting high-pitched sounds an

Sergeu [11.5K]

Answer:

$Mean = 48.6364$

$s^2 = 331.8545$ -- Sample Variance

$s = 18.2169$ --- Sample Standard Deviation

Step-by-step explanation:

Given

$n = 11$

$Data: 24, 41 ,25 ,68 ,53 ,83 ,43 ,63 ,56 ,34 ,45$

Solving (a): The sample mean

$Mean = \frac{\sum x}{n}$

So:

$Mean = \frac{24 +41 +25 +68 +53 +83 +43 +63 +56 +34+ 45}{11}$

$Mean = \frac{535}{11}$

$Mean = 48.6364$

Solving (b): Sample variance (s^2)

This is calculated as:

$s^2 = \frac{\sum (x - \bar x_i)^2}{n - 1}$

Where:

$\bar x = 48.6364$

So:

$s^2 = \frac{(24 -48.6364)^2 +(41 -48.6364)^2 +......................+( 45 -48.6364)^2}{11-1}$

$s^2 = \frac{3318.54545456}{10}$

$s^2 = 331.8545$

Solving (c): Sample Standard Deviation (s)

This is calculated as:

$s = \sqrt {s^2$

$s = \sqrt{331.8545$

$s = 18.2169$

8 0

3 years ago

Simplify:3/4-1/3+1/12

goblinko [34]

Answer:

1/2

Step-by-step explanation:

5/12+1/12

=1/2

Here u goo hope it helps :))

4 0

3 years ago

Read 2 more answers

Three friends drove radio controlled cars around a track. The table below shows the number of laps

satela [25.4K]

Kaitlyn:6
keiko: 4
ann: 5
keiko drive the fastest

8 0

3 years ago

Can someone answer these please

grandymaker [24]

Answer:

Step-by-step explanation:

A. 3.11

B.7.5

C.6.46

D.133.17

4 0

3 years ago

Which would be the best method to use to solve the following equation. Explain your reasoning.

s2008m [1.1K]

Answer:

x = 3 and x = -2

Step-by-step explanation:

The given equation is :

$x^2-x-6=0$

We need to solve the given equation.

We can solve it using Completing the Square method.

We take two numbers such that their product is -6 and sum is -1.

So,

$x^2-x-6=0\\\\x^2+2x-3x-6=0\\\\x(x+2)-3(x+2)=0\\\\(x-3)(x+2)=0\\\\x=3\ and\ x=-2$

so, the values of x are 3 and -2.

4 0

3 years ago