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tino4ka555 [31]
3 years ago
11

If y varies directly as x, and the constant of variation is -3, which equation represents this relationship?

Mathematics
1 answer:
kow [346]3 years ago
5 0
Y=kx..............y=-3x
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Each of the 6 cats in a pet store was weighed. Here are their weights (in pounds):
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Answer:

the median is 9,the mean is 9.3

Step-by-step explanation:

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Can someone please help with my maths homework? I need to estimate the value of 102.3 / 4.7
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OK  - convert  the 2 numbers  to  one significant figure:-

102.3  = 100
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So the estimate is 100/5  = 20 answer
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Which expression is a possible leading term for the polynomial function graphed below?
SSSSS [86.1K]
From the graph, it looks like the polynomial is a one with a leading term that has an odd power, so this rolls out option 1 and 3.

Like wise, option 2 is not the answer because it has a negative symbol.

This leaves us with option 4, 22x^9 as the right answer.
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2 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
2 years ago
Simplify these 2 questions:
kaheart [24]

Answer:

Hope the answer It'll help you:)

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