3 years ago

Please help i will mark brainly!

Mathematics

1 answer:

mariarad [96]3 years ago

8 0

Answer:

D is the answer. :)

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6 times x divided by 18

maw [93]

Answer:

$\frac{6x}{18}$

Step-by-step explanation:

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2 years ago

The system of equations y=4x y-4=4 (x-1) has.

Alekssandra [29.7K]

Answer:

infinitely many solutions.

Step-by-step explanation:

y=4x

y-4=4 (x-1)

Lets substitute the first equation into the second equation.

4x -4 = 4(x-1)

Distribute

4x-4 = 4x-4

Subtract 4x from each side

4x-4x-4 =4x-4x-4

-4=-4

This is always true. X can be anything. We have infinite solutions

6 0

3 years ago

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A bag holds 500 grams of sand. About how many grains of sand are in the bag? There are about 1,000 grains of sand in 1 gram.

Nuetrik [128]

500000 is the answer you are looking for my friend :D

4 0

2 years ago

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A test score of 48.4 on a test having a mean of 66 and a standard deviation of 11. Find the z-score corresponding to the given

Mariulka [41]

Answer:

A. -1.6; not significant

Step-by-step explanation:

The z-score of a data set that is normally distributed with a mean of $\bar x$ and a standard deviation of $\sigma$ , is given by:

$z=\frac{x-\bar x}{\sigma}$ .

From the question, the test score is: $x=48.4$ , the mean is $\bar x=66$ , and the standard deviation is $\sigma =11$ .

We just have to plug these values into the above formula to obtain:

$z=\frac{48.4-66}{11}$ .

This simplifies to: $z=\frac{-17.6}{11}$ .

$z=-1.6$ .

We can see that the z-score falls within two standard deviations of the mean.

Since $-2\le-1.6\le2$ the value is not significant.

The correct answer is A. -1.6; not significant

3 0

3 years ago

Simplify the expression (7+5)+4x13-2

koban [17]

I think the answer is 62 because 7+5=12 4*13=52 12+52=64 64-2=62

8 0

3 years ago