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3 years ago

Find the common difference for the arithmetic sequence. 1.7, 2.7, 3.7 4.7.....

Mathematics

1 answer:

Anni [7]3 years ago

5 0

Answer:

Step-by-step explanation:

You do not need to where the formula comes from but, just for fun, here’s a hint

To add up the numbers 1 to 10

Write out the numbers

1 2 3 4 5 6 7 8 9 10

Write them backwards

10 9 8 7 6 5 4 3 2 1

Add up both lists

11 11 11 11 11 11 11 11 11 11

This is 10 × 11 = 110

But this is twice the sum as two lots were added together

So the sum of the numbers 1 to 10 is 110 ÷ 2 = 55

ArSeqSum Notes fig4, downloadable IGCSE & GCSE Maths revision notes

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The physical motion of an object is modeled by the function

Ludmilka [50]

I think it’s 10.009 seconds. S=21.3t and s is given so you substitute it getting 213.2=21.3t so you divide by 21.3 to solve for t. You get 10.0093 so idk if you’d round it to 10.009 or 10.01

8 0

3 years ago

The following are the last 10 run scores Colin got in cricket :

Volgvan

Answer:

a. 8.5

b. 10

Step-by-step explanation:

a.) 1, 1, 2, 7, 7, 10, 12, 16, 20, 34

Since 7 and 10 are tied in the middle, then we need to find a number in the middle of the two.

8.5 is in the middle of 7 and 10, therefore 8.5 is the mean.

b.) We need to do the same thing we did before, except add 22 to it's directed place:

1, 1, 2, 7, 7, 10, 12, 16, 20, 22, 34

Since 10 is in the middle, 10 is the new mean.

Hope this helps! :D

3 0

3 years ago

2 Does the figure have rotational symmetry? if it does, find the angle of rotation.

inysia [295]

First one is B and second one is d I think

7 0

4 years ago

Read 2 more answers

Not sure how to go about figuring this out.

ivolga24 [154]

Answer:

The correct option is D.

Step-by-step explanation:

The linear regression equation is in the form of

$y=mx+c$

It is also defined as

$y=bx+a$

Where,

$b=\frac{n(\sum xy)-(\sum x)(\sum y)}{n(\sum x^2)-(\sum x)^2}$

$a=\frac{(\sum y)(\sum x^2)-(\sum x)(\sum xy)}{n(\sum x^2)-(\sum x)^2}$

The values are

$\sum x=15,\sum y=117.06,\sum x^2=55,\sum xy=348.95$

Using above formulas, we get

$b=-0.223$

$a=24.081$

Therefore the linear regression equation is

$y=-0.223x+24.081$

Therefore the option D is correct.

3 0

3 years ago

A candy dispenser has 20 golden wrapped chocolate balls, 25 green hard candies and 30 pink gumballs. What is the least number of

blondinia [14]

18 is my answer. You should still try to do the work yourself just to make sure its correct

Happy studying ^-^

8 0

4 years ago