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3 years ago

2r + 3s = 14 6r - 3s = 6

Mathematics

1 answer:

Gekata [30.6K]3 years ago

6 0

Answer:

r= 2.5 and s=3

Step-by-step explanation:

2r plus 6r equals 8r

-3s and 3s cancell eachother out

and 14 plus 6 is 20

with leaves us with

8r=20

20 divided by 8 is 2.5

now we go back to the orginal problems

2 times 2.5 is 5

14 minus 5 is 9

9 divided by 3 is 3

so s=3

but to check this all you would use r=2.5 and s=3 in the othe equsion

6 times 2.5 is 15

and -3 times 3 is -9

15-9= 6

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2.5 + 3(5-2.1p) = -13.37

EastWind [94]

Answer:

2.5 + 3(5-2.1p) = -13.37

2.5+15-6.3p=-13.37

17.5-6.3p=-13.37

-6.3p=-30.87

p=4.9

hope this helps

have a good day :)

Step-by-step explanation:

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3 years ago

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5=x+8 (Sorry but i've been on this one for hours)

DENIUS [597]

Answer:

x = -3

Step-by-step explanation:

Subtract 8 from both sides to get x alone.

5 - 8 = x + 8 - 8

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3 years ago

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Answer:

75.35

Step-by-step explanation:

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How to reduce into simpler terms.?

Sveta_85 [38]

Answer:

The simplest form of the fraction $\frac{45}{100}$ is $\frac{9}{20}$ .

i.e.

$\frac{45}{100}=\frac{9}{20}$

Step-by-step explanation:

Here are some simple observations regarding how to reduce a fraction into simpler terms:

A fraction is reduced to lowest or simplest terms by finding an equivalent fraction in which the numerator and denominator are as small as possible.

In order to reduce a fraction to lowest or simplest terms, divide the numerator and denominator by their (GCF). Note that (GCF) is also called Greatest Common Factor .

So, lets take a sample fraction and reduce into simpler terms.

Considering the fraction

$\frac{45}{100}$

$\mathrm{Find\:a\:common\:factor\:of\:}45\mathrm{\:and\:}100\mathrm{\:in\:order\:to\:cancel\:it\:out}$

$\mathrm{Greatest\:Common\:Divisor\:of\:}45,\:100:\quad 5$

$\mathrm{Factor\:out\:}5\mathrm{\:from\:the\:numerator\:and\:the\:denominator}$

$45=5\cdot \:9\mathrm{,\:\quad }100=5\cdot \:20$

$\frac{45}{100}=\frac{5\cdot \:\:9}{5\cdot \:\:20}$

$\mathrm{Cancel\:the\:common\:factor:}\:5$

$=\frac{9}{20}$

Therefore, the simplest form of the fraction $\frac{45}{100}$ is $\frac{9}{20}$ .

i.e.

$\frac{45}{100}=\frac{9}{20}$

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4 years ago

What is the formula for the sum of the interior angles of a polygon

andrey2020 [161]

Answer:

Sum of the interior angles = (n-2) x 180°

where

n is the number of sides of the polygon

Step-by-step explanation:

The formula for the sum of the interior angles of a polygon is:

$sum=(n-2)*180$

where

$sum$ is the sum of the interior angle of the polygon

$n$ is the number of polygons

Let's check the formula using an example:

We want to find the sum of the interior angles of a square, we know that a square has 4 sides, so $n=4$ .

Replacing values

$sum=(4-2)*180$

$sum=(2)*180$

$sum=360$

We can apply the same procedure to any convex polygon with n sides.

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