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3 years ago

What is x+3=-4 as a decimal (Sole for x)

Mathematics

2 answers:

viktelen [127]3 years ago

8 0

Answer: x = 7

Step-by-step explanation:

Subtract both sides by 3

X+3-3 = -4 - 3

X+0 = -7

X=-7

BigorU [14]3 years ago

5 0

Answer:

-7

Step-by-step explanation:

x+3=-4

x=-4-3 (subtract 3 from both sides)

x=-7 (combine like terms)

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What is the greatest common factor of 48 and 64?

aleksklad [387]

Answer:

The GCF of 48 and 64 is 16

Step-by-step explanation:

To figure out GCF, you make a list of all the prime factors, pick out the numbers they have in common, and multiply them together. In this case:

48: 2 x 2 x 2 x 2 x 3

64: 2 x 2 x 2 x 2 x 2 x 2

They have four 2's in common, so you multiply 2 x 2 x 2 x 2 =16

8 0

3 years ago

Shannon buys strawberry gum in packs of 6 pieces and blueberry gum in packs of 5 pieces. If Shannon wants to buy the same amount

DIA [1.3K]

30 pieces of blueberry and 30 pieces of strawberry, therefore 5 packs of blueberry and 6 packs of strawberry

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3 years ago

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To keep the image in proportion what do you have to do?

hoa [83]

Answer:

Press shift while you drag a corner handle to prevent stretching and keep your picture in proportion. Don't drag from any of the side handles; this will distort the picture even if you do press Shift!

Step-by-step explanation:

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3 years ago

Tamiya wants to display 10 trophies on a table in a rectangular array. How many different ways can Tamiya arrange the trophies?

blondinia [14]

Around the table in a circle, on the table

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3 years ago

You are going to estimate how long a person holds down a button on their calculator by randomly selecting people and asking them

Ray Of Light [21]

Answer:

You need to have 538 people in your study.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.94}{2} = 0.03$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.03 = 0.97$ , so Z = 1.88.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

You practiced on the people at work and found a standard deviation of about 0.37 seconds.

This means that $\sigma = 0.37$

You want to get a 94% confidence interval that is only 0.06 in width.

This means that $M = \frac{0.06}{2} = 0.03$

How many people do you need to have in your study?

This is n for which M = 0.03. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.03 = 1.88\frac{0.37}{\sqrt{n}}$

$0.03\sqrt{n} = 1.88*0.37$

$\sqrt{n} = \frac{1.88*0.37}{0.03}$

$(\sqrt{n})^2 = (\frac{1.88*0.37}{0.03})^2$

$n = 537.6$

Rounding up:

You need to have 538 people in your study.

7 0

3 years ago