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DerKrebs [107]
4 years ago
13

3x + 12y = 24 3x - 3y = 24

Mathematics
2 answers:
ser-zykov [4K]4 years ago
4 0

what would you like me to do with these numbers????

nevsk [136]4 years ago
3 0

Answer:

x=8, y=0

Step-by-step explanation:

<u>First method: substitution method</u>

3x +12y= 24 -------(1)

3x -3y= 24

3x= 3y +24 -------(2)

subst. (2) into (1):

3y +24 +12y= 24

(We are substituting the value of 3x into equation 1)

15y= 24-24 (simplify, bring constant to one side)

15y= 0 (simplify)

y= 0 (divide by 15 on both sides)

subst. into (2):

3x= 3(0)+24

3x= 24 (simplify)

x= 24/3 (divide by 3 on both sides)

x= 8

<u>second method: elimination method</u>

3x+12y=24 ------(1)

3x-3y= 24 -------(2)

(1 )- (2):

(3x+12y) - (3x-3y)= 24-24

3x+12y -3x+3y= 0

15y=0 (simplify)

y=0 (divide by 15 on both sides)

From (2):

3x= 3y+24

x= y+ 8 (divide by 3 on both sides)

when y=0,

x= 0+8

x=8

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<em>Answer:</em>

<em>B) exactly one solution</em>

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4 years ago
I have the formula <br><br> A fraction • π r^2
MatroZZZ [7]

Answer:

22.2 ft²

Step-by-step explanation:

The area (A) of a sector is calculated as

A = area of circle × fraction of circle

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4 0
4 years ago
What is the square root of 82
Andru [333]

Well, the square root of 82 is an irrational number, so
it can never be completely written with digits.  As a
decimal, it goes on and on forever, and never ends. 
As a fraction, it can't be written at all.

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5 0
3 years ago
Read 2 more answers
Firdaus measured the length of the wall and got 9 feet her cousin measured the same distance and said that it was three what uni
Dahasolnce [82]

Answer:

Her cousin used Yard  to measure the wall.

Step-by-step explanation:

Firdaus measured the length of the wall and got 9 feet.

Her cousin measured the same distance and said that it was 3.

To find the answer, we have to use division.

Let "x" the divisor which divide 9 and gives the answer 3.

9 ÷ x = 3

3x = 9

To find x (divisor) we need to divide both sides by 3, we get

3x ÷ 3 = 9 ÷ 3

x = 3

So  1 unit cousin's measure = 3 feet Firdaus measure

We know that 1 yard = 3 feet.

Therefore, her cousin used Yard measure to measure the wall.

7 0
3 years ago
For the given central angle, determine the distance traveled along the unit circle from the point (1, 0). 210 degrees a. 3.67 un
Black_prince [1.1K]

Answer:

3.67 units

Step-by-step explanation:

The central angle is at the point (0,0).

Then it's at the point (1,0)

Then it moved 210 degrees.

Let's bear in mind that we start moving the degree from it's current position.

So moving 210 degrees is moving 180 degrees plus 30 degrees.

Moving 180 degrees I like transforming linearly.

Now the location is at (-1,0)

But the distance covered will be

= 2πr*210/360

r = 1

= 2*3.142*1*(210/360)

= 6.144*0.5833333

= 3.67 units

3 0
3 years ago
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