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3 years ago

Work out the mean for the data set below: 2.2, 2, 8.9, 4.1, 8.2

Mathematics

1 answer:

goblinko [34]3 years ago

8 0

Add all and divide by how many there is
answer is 5.08

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Lana cuts 2 pieces for every 7 inches from a dowel for a craft project, for a total of 1 pieces. What is the length of the dowel

gtnhenbr [62]

Answer:

3.5 Hope this helps yall :)!!!

Step-by-step explanation:

4 0

4 years ago

Four is no less than the quotient of a number x and 2.1.

ivann1987 [24]

Answer:

4 > x/2.1

Step-by-step explanation:

4 cannot be less than anything, so the inequality sign has to be "eating" the 4.

4 > ?

The quotient of a number x and 2.1 is simply saying division

4 > x/2.1

5 0

3 years ago

Evaluate the following: −3 − (−2). (5 points) Question 1 options: 1) −5 2) −1 3) 1 4) −6

Ganezh [65]

Answer:

2) -1

Step-by-step explanation:

it is easy

we have to first open the brackets, as it is ' - ' we have to change the sign to opposite of that of the number in the bracket and then solve it.

so the number 2 is having negative sign, we make it positive. this rule is applied only when there is a negative sign and a bracket is there.

-3-(-2)

-3+2

=-1

7 0

4 years ago

If x = 4, what is the value of 2x2 - 7?

Fudgin [204]

Answer:

A) 25

Step-by-step explanation:

I am assuming that you mean: 2x² - 7.

$2(4)^2 - 7\\\rule{150}{0.5}\\\rightarrow 2 *4^2 - 7\\\\\rightarrow 2 * 16 - 7\\\\\rightarrow 32 -7\\\\\rightarrow \boxed{25}$

5 0

3 years ago

Read 2 more answers

Write a recursive formula and an explicit formula for the following arithmetic sequence: -1,6,13,20,27

Luden [163]

Answer:

Recursive formula is: $a_1=-1 ; \ \ a_n=a_{n-1}+7$

Explicit formula is: $a_n=7n-8$

Step-by-step explanation:

We need to find recursive formula and explicit formula for arithmetic sequence -1,6,13,20,27

In the given sequence First term a₁= -1

Common difference d = 7

Finding Recursive Formula

The recursive formula is of type: $a_1= First \ term$ and $a_n=a_{n-1}+d$

Since the First term a₁ is -1 and common difference d is 7 so, the recursive formula for given arithmetic sequence will be:

$a_1=-1 ; \ \ a_n=a_{n-1}+7$

Finding Explicit Formula

The explicit formula is of type: $a_n=a_1+(n-1)d$

We have

First term a₁= -1

Common difference d = 7

So, explicit formula will be:

$a_n=-1+(n-1)7\\a_n=-1+7n-7\\a_n=7n-8$

So, explicit formula is: $a_n=7n-8$

7 0

3 years ago