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4 years ago

One more than three times a number is the same as the number decreased by 5 find the number

Mathematics

2 answers:

andre [41]4 years ago

6 0

3x+1 = 5x-15

3x+1-5x = -15

-2x+1 = -15

-2x=-15-1

-2x=-16

x = 8

Otrada [13]4 years ago

5 0

I also need this answer so some one help please

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3. Classify the polygon below by its sides,<br>convex/concave, and regular/irregular

wolverine [178]

Answer:

The polygon is a concave polygon

The polygon is irregular polygon

Step-by-step explanation:

Convex polygon is polygon that has all interior angles less than 180°

In a convex polygon, every diagonal of the figure passes only through interior points of the polygon

A line drawn through a convex polygon will intersect the polygon in exactly two points

Some of convex polygons can be regular polygons

Concave polygon is a polygon that has one or more interior angles greater than 180°

In a concave polygon, at least one diagonal of the figure contains points that are exterior to the polygon

A line drawn through a concave polygon, can intersect the polygon in more than two points

Concave polygon never be a regular polygon

From the attached figure

∵ The polygon has one diagonal lies out the interior of the polygon

∴ The polygon is a concave polygon

∵ All the concave polygons are regular polygons

∴ The polygon is irregular polygon

7 0

3 years ago

Isabella uses the equation V = one-third (12) squared (9) pi to find the volume of the cone below.

lyudmila [28]

Isabella’s error is Isabella should have divided the product of 12π and 9 by 3 to get V = 12π(9)/3 option fourth is correct.

It is defined as a three-dimensional shape in which the base is a circular shape and the diameter of the circle decreases as we move from the circular base to the vertex.

$\rm V=\pi r^2\dfrac{h}{3}$

Isabella equation:

$\rm V = \dfrac{1}{3}(12)^2(9)\pi$

The area of the base = 12π square cm

$\rm V = \dfrac{12\pi (9 )}{3}$

Thus, Isabella’s error is Isabella should have divided the product of 12π and 9 by 3 to get V = 12π(9)/3 option fourth is correct.

Learn more about the cone here:

brainly.com/question/16394302

#SPJ1

6 0

2 years ago

What is a statistical error?

vovikov84 [41]

Answer:

Statistical error is the difference between the estimated or approximated value and the true value.

<u>Two Possible Types of Statistical Error</u>

Type I Errors occur when we reject a null hypothesis that is actually true; the probability of this occurring is denoted by alpha (a).

Type II Errors are when we accept a null hypothesis that is actually false; its probability is called beta (b).

<u>Example </u>

You test whether a new drug intervention can alleviate symptoms of an autoimmune disease.

A Type I error happens when you get false positive results: you conclude that the drug intervention improved symptoms when it actually didn’t. These improvements could have arisen from other random factors or measurement errors.

A Type II error happens when you get false negative results: you conclude that the drug intervention didn’t improve symptoms when it actually did. Your study may have missed key indicators of improvements or attributed any improvements to other factors instead.

4 0

3 years ago

Hey i need help! no stupid answers!

Ahat [919]

Your first equation would be:
65 + 3x - 10 + 2x = 180
Then simplify to get:
5x + 55 = 180
Subtract 55 from each side:
5x = 125
Now divide by 5 to find x:
x = 25

The measure of angle B = 65
The measure of angle C = 50

Hope this helps!! :)

8 0

4 years ago

Read 2 more answers

Is (7,0) a solution to the equation y = x - 2?

murzikaleks [220]

Answer:

Step-by-step explanation:

because 7-7=0 and it doesn't subtract by 2

it is not equal to y=x-2

8 0

3 years ago

Read 2 more answers

One more than three times a number is the same as the number decreased by 5 find the number​

One more than three times a number is the same as the number decreased by 5 find the number