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alukav5142 [94]

3 years ago

15

Help me solve this problem please

1 answer:

Serjik [45]3 years ago

5 0

Width = 11
length = 19

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A rectangular packet of drink has a width that is 2 cm less than its length.

snow_lady [41]

Answer:

$6m^2+8m-16$

Step-by-step explanation:

Given that the length of the packet is $l=m$ cm.

Then the width being 2cm less than the length becomes $w=m-2$ and the height being 4 cm more than its length becomes $h=m+4$

The total surface area of the rectangular packet is given by:

$T.S.A=2(lw+lh+wh)$

$\implies T.S.A=2[m(m-2)+m(m+4)+(m-2)(m+4)]$

We expand to get:

$\implies T.S.A=2(m^2-2m+m^2+4m+m^2+4m-2m-8))$

$\implies T.S.A=2(3m^2+4m-8)=6m^2+8m-16$

6 0

3 years ago

Select the correct answer.

Bumek [7]

Answer:

Is the A

Step-by-step explanation:

6 0

3 years ago

Is 3x-7xyz polynomial

Mashcka [7]

What does that word mean

4 0

3 years ago

Question 3 A study was performed to determine whether men and women differ in their repeatability in assembling components on pr

Fed [463]

Answer:

There is no sufficient evidence to support the claim that men and women differ in repeatability for this assembly task

Step-by-step explanation:

Given

Let subscript 1 represent men and 2 represent women, respectively.

$n_1 = 25$

$n_2 = 21$

$s_1 = 0.98$

$s_2 = 1.02$

$\alpha = 0.02$

Required

Determine if here is enough evidence

First, we need to state the hypotheses

$H_o: \sigma_1^2 = \sigma_2^2$

$H_1: \sigma_1^2 \ne \sigma_2^2$

Next, calculate the test statistic using:

$F = \frac{s_1^2}{s_2^2}$

$F = \frac{0.98^2}{1.02^2}$

$F = 0.923$

Calculate the rejection region;

But first, calculate the degrees of freedom

$df_1 =n_1 - 1$

$df_1 =25 - 1$

$df_1 =24$

$df_2 = n_2 -1$

$df_2 = 21 - 1$

$df_2 = 20$

Using the F Distribution: table

$c = \frac{\alpha}{2}$

$c = \frac{0.02}{2}$

$c = 0.01$

At 0.01 level (check row 20 and column 24), the critical value is:

<em></em> $f_{0.01,24,20} = 2.86$ <em> --- the upper bound</em>

At 0.01 level (check row 24 and column 20), the critical value is:

$f_{0.01,20,24} = 2.74$

Calculate the inverse F distribution.

$f_{0.99,20,24} = \frac{1}{f_{0.01,20,24}} = \frac{1}{2.74} =0.365$ ---- the lower bound

The rejection region is then represented as:

$0.365 < Test\ Statistic < 2.86$

If the test statistic falls within this region, then the null hypothesis is rejected

$F = 0.923$ --- Test Statistic

$0.365 < 0.923 < 2.86$

<em>The above inequality is true; so, the null hypothesis is rejected.</em>

<em>This implies that, there is no sufficient evidence.</em>

7 0

3 years ago

BRAINLIEST TO CORRECT

mina [271]

Answer:

is greater than

Step-by-step explanation:

First, if you unmix the numbers, you will get 1 1/8 and 1 1/9. If you split something into 9, the pieces will be smaller than if you split something into 8.

Therefore, 9/8 is greater than 10/9.

<em>-kiniwih426</em>

6 0

3 years ago