All categories

3 years ago

Give me explain Associative property of addition??

1 answer:

7 0

Associative property of addition states: a + (b + c) = (a + b) + c

Don't get confused with the commutative property which states: a + b = b + a

You might be interested in

I need help with this one

MissTica

Answer:

Step-by-step explanation:

394,717.330 rounds to 400,000

6 0

3 years ago

Solve for x. Round to the nearest tenth, if necessary.

galben [10]

Answer:

15.4

Step-by-step explanation:

sin 17° = 4.5 /x

x = 4.5 / sin 17° = 4.5 /0.2924

= 15.4

6 0

2 years ago

Read 2 more answers

Math 7 Grade 7

OleMash [197]

The conclusion is valid
it is a systematic random sample
and the second one is a line graph (I think)

8 0

3 years ago

Read 2 more answers

A random sample of 10 shipments of stick-on labels showed the following order sizes.10,520 56,910 52,454 17,902 25,914 56,607 21

sammy [17]

Answer:

Confidence Interval: (21596,46428)

Step-by-step explanation:

We are given the following data set:

10520, 56910, 52454, 17902, 25914, 56607, 21861, 25039, 25983, 46929

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{340119}{10} = 34011.9$

Sum of squares of differences = 551869365.6 + 524322983.6 + 340111052.4 + 259528878 + 65575984.41 + 510538544 + 147644370.8 + 80512934.41 + 64463235.21 + 166851472.4 = 2711418821

$S.D = \sqrt{\frac{2711418821}{9}} = 17357.09$

Confidence interval:

$\mu \pm t_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 9 and}~\alpha_{0.05} = \pm 2.2621$

$34011.9 \pm 2.2621(\frac{17357.09}{\sqrt{10}} ) = 34011.9 \pm 12416.20 = (21595.7,46428.1) \approx (21596,46428)$

7 0

3 years ago

Christopher bought 4 pens that cost the same amount of money and a marker that cost $3. He spent a total of $11. Which statement

Nikolay [14]

The pens cost $2 each.
2*4+3=11

8 0

3 years ago