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Murljashka [212]

3 years ago

14

What is 4x-7xy+9xy-7pq

1 answer:

konstantin123 [22]3 years ago

4 0

Answer: " 4x + 2xy - 7pq " .
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Explanation:
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Given: " <span>4x - 7xy + 9xy - 7pq " ; Simplify the expression;
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Combine the "like terms:
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-7xy + 9xy = 2xy ;
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Now, rerewrite the expression, substituting the "-7xy + 9xy"; with " + 2xy" ;
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</span>→ " 4x + 2xy - 7pq " .
<span>___________________________________

</span>

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In the diagram below DE is parallel to XY what is the value of Y ?

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B. 94 because it is the same as the other one

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The side of a rhombus is 15 centimeters long, and the length of its longer diagonal is 24.6 centimeters. Find the area.

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A pension fund owns 2,600 fewer shares in mutual stock funds than mutual bond funds. Currently, the stock funds sell for $14 per

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Answer:

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Step-by-step explanation:

Stock price = $14 p/s

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7 0

3 years ago

A manufacturer of salad dressings uses machines to dispense liquid ingredients into bottles that move along a filling line. The

KonstantinChe [14]

Answer:

Step-by-step explanation:

From the given information:

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$H_o: \mu = 8$

The alternative hypothesis is:

$H_1 : \mu \ne 8$

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Sample mean = 7.91

variance = 0.03

Standard deviation = $\sqrt{0.03} = 0.173$

The t-test statistics is computed as:

$t = \dfrac{\bar x - \mu}{\dfrac{s}{\sqrt{n}}}$

$t = \dfrac{7.91 -8}{\dfrac{0.1732}{\sqrt{35}}}$

$t = \dfrac{-0.09}{\dfrac{0.1732}{5.916}}$

t = - 3.0741

Degree of freedom:

df = n - 1

df = 35 - 1

df = 34

Level of significance = 1 - C.I

= 1 - 0.99

= 0.01

The t_{critical} value for the two-tailed test at 0.01 is within the rejection region:

$t_{critical} = -2.728 \ and \ 2.728$

Decision rule: To reject $H_o$ if $t< -2.728 \ or \ t > 2.728$

As $t_{statistics}$ fails the rejection region, we reject $H_o$

Conclusion: There is sufficient evidence to believe that the machine will not dispense 8 ounces & and it must be stopped for repairs.

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3 years ago

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