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2 years ago

(Math Help Quick Lots of points please thanks)

Mathematics

2 answers:

Elden [556K]2 years ago

8 0

Answer:

E = {0, 1, 2, 3)

Step-by-step explanation:

Integer: a number with no decimal or fractional part, from the set of negative and positive numbers, including zero
< means less than
> means more than

E = {0, 1, 2, 3)

RUDIKE [14]2 years ago

4 0

E={y|y is an integer and -1<y<4}

Now here value of y is

$\\ \tt\hookrightarrow y\in(-1,4)$

$\\ \tt\hookrightarrow E=\{0,1,2,3\}$

Done

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Simplify the expression. 8w + 5r – t + 9r

Wittaler [7]

Answer:

14r−t+8w

Step-by-step explanation:

Let's simplify step-by-step.

8w+5r−t+9r

=8w+5r+−t+9r

Combine Like Terms:

=8w+5r+−t+9r

=(5r+9r)+(−t)+(8w)

=14r+−t+8w

Answer:

=14r−t+8w

3 0

2 years ago

The circumference of a circle can be found using the formula C = 2r. Which is an equivalent equation solved for r? r = C r = C(2

vaieri [72.5K]

Answer:

r equals StartFraction C Over 2 pi EndFraction

Step-by-step explanation:

we know that

The circumference of a circle is equal to

$C=2\pi r$

where

r is the radius of the circle

Solve for r

That means -----> isolate the variable r

Divide by 2π both sides

$\frac{C}{2\pi}=\frac{2\pi r}{2\pi}$

Simplify right side

$\frac{C}{2\pi}=r$

Rewrite

$r=\frac{C}{2\pi}$

r equals StartFraction C Over 2 pi EndFraction

5 0

3 years ago

Read 2 more answers

Four pounds of apples cost $1.96.

sasho [114]

Four pounds of apples cost $1.96
so each pound cost: $1.96 / 4 = $0.49 or 49 cents

hope it helps

6 0

3 years ago

A container is 70% filled with chemical solution. The container holds 1,650 liters of chemical solution. How many liters of che

Anton [14]

Answer:

495

Step-by-step explanation:

1,650 x 0.7 = 1,155

1,650 - 1,155 = 495

(0.7 is the percentage)

Hope this helps!

7 0

2 years ago

Read 2 more answers

On a test, mean score was 70 and the standard deviation of the scores was 15. What percent of the test takers scored above 80

Anna007 [38]

Answer:

25%.

Step-by-step explanation:

When calculating percentile of a value within a sample population, you'll want to use what's called the z-score formula, notated as such:

z = (x – μ) / σ

Or, the z-score equals the difference of the x-value minus the mean (μ), divided by the standard deviation (σ). We can use the equation to sub in our numbers:

$z=\frac{80-70}{15}\\z=\frac{10}{15}\\\\z=\frac{2}{3} \\z=0.667$

Since we are looking for scores above 80, what we want to find is the area under the normal distribution curve that is to the right of our value of 80, or the pink area illustrated in the attached picture.

For this, we can use the standard Z table to look up our z-score and find what percent of our chart we've filled, to the left of our value. You can find Z tables in algebra textbooks or online, like this one: http://www.z-table.com/

In this instance, our z-score gives us a resulting Z table percentile between .7454 (z-score of 0.66) and .7486 (z-score of 0.67). This means that, in our normal distribution with a mean of 70 and a standard deviation of 15, the area to the left of the value of 80 is about 74.6%.

So, now we know that our value of 80 makes up about 74.6% of our curve from the left. To find the area to the right, we just subtract from the total area, which is 1 in a normally distributed curve. This gives us 25.4%. Since we're looking for the percent of test takes scoring above our value, I'll round that down to 25%.

3 0

3 years ago