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2 years ago

(2n−9)−5(−2.4n+4) Find the difference

Mathematics

1 answer:

goblinko [34]2 years ago

8 0

Answer:

14n - 29

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Algebra I

Combining Like Terms

Step-by-step explanation:

Step 1: Define

(2n - 9) - 5(-2.4n + 4)

Step 2: Simplify

Distribute -5: 2n - 9 + 12n - 20
Combine like terms (n): 14n - 9 - 20
Combine like terms (Z): 14n - 29

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sp2606 [1]

Answer:

Not the same.

Step-by-step explanation:

Given that there is a rotation of 180 degrees . To check whether this is a reflection over the y axis.

Reflection over the y axis make the coordinates (x,y) as (-x,y)

i.e. this means rotation of 180 degrees about the origin anticlockwise.

Hence just rotation of 180 degrees is not the same as a reflection over y axis.

The conditions are:

i) 180 degree to be rotated anticlockwise

ii) Rotation is about the origin

Hence a rotation of 180 degrees need not always be the same as reflection over y axis.

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2 years ago

LeAnn is purchasing.giftwrap for a box that measures 10 inches long, 6 inches wide, and 6 inches tall. Calculate the total area

Sholpan [36]

10 time 6 times 6 = 360

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2 years ago

A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 436.0 gram setting. It

Vilka [71]

Answer:

We conclude that the machine is under filling the bags.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 436.0 gram

Sample mean, $\bar{x}$ = 429.0 grams

Sample size, n = 40

Alpha, α = 0.05

Population standard deviation, σ = 23.0 grams

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 436.0\text{ grams}\\H_A: \mu < 436.0\text{ grams}$

We use one-tailed(left) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

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$z_{stat} = \displaystyle\frac{429 - 436}{\frac{23}{\sqrt{40}} } = -1.92$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

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2 years ago

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Hence, the required ratio would be 3 miles : 4 minutes.

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2 years ago

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Answer:

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Step-by-step explanation:

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