Thuy wrote the system of equations. 24 x + 36 y = 72. Negative 16 x + 8 y = 80. If the second equation is multiplied by 3, what should the first equation be multiplied by to eliminate the x variable by addition?

Answers

Answer 1

Answer:

multiply the first equation by 2

Step-by-step explanation:

24x + 36y = 72

-16x + 8y = 80

48x + 72y = 144

-48x + 24y = 240

96y = 384

y = 4

24x + 36(4) = 72

24x + 144 = 72

24x = -72

x = -3

(-3, 4)

Answer 2

First equation should be multiplied by 2 to eliminate the x variable by addition.

What is the system of equation?

" A system of equation is a finite set of equations for which we find the common solution."

According to the question,

System of equations are

24x + 36y = 72

-16x + 8y = 80

As per the given condition,

Second equation multiply by 3 we get,

-48x + 24y =240

To eliminate x by adding we have to multiply  first equation by 2 we get,

48x + 72y = 144

 Now add both the equation we get,

    96y =384

⇒ y = 4

Hence, first equation should be multiplied by 2 to eliminate the x variable by addition.

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Related Questions

4, 6, 2, 6, 9, 3, 5
Mode ??
Median ?? Mean??

Answers

Mean: 5
Mode: 6
Median : 5

explanation ;)

MEAN - add all the numbers = 4+6+2+6+9+3+5 =42

then you count have many numbers you got 7

after that you divided 7/42 = 6 that the mean or something call average:)

MEDIA - to find out was the meaning is you first make in order like youngest to oldest 2, 3, 4, 5, 6, 6, 9 and circle what numbers is on the middle that is 5.

listen if there even amounts of numbers you just circle the two numbers in the middle then add does two numbers and divide dy 2 ONLY IF IS EVEN

MODE- look for the two numbers they are the same 6

and that's the mode

6,5,6

Convert the following equation to Slope-Intercept Form
HINT: Slope-Intercept Form is y = mx + b
y+1 = -5(x – 3)

Answers

Y=-5x+14............... mark as brainpower if right lol
answer

y=-5x-16

explanation

you distribute-5 and get -5x-15 then you subtract 1 to both sides

- 8/3x -3 + 1/3x -1 =5

Answers

Answer:

3 6/7.

Step-by-step explanation:

Answer:

-3  6/7

Step-by-step explanation:

rewrite with 'like' terms next to each other:

-8/3x + 1/3x + (-3) + (-1) = 5

-7/3x + (-4) = 5

-7/3x = 9

multiply each side by -3/7

x = -27 /7 or -3  6/7

Which of the following statements is false?
8<8
2>8
2<8
2<8

Answers

Answer:

8<8 and 2>8 are both false

Answer:

B

Step-by-step explanation:

There are only red beads and green beads in a bag.
The ratio of the number of red beads to the number of green beads is 5 : 9
(a) What fraction of the beads are red?

There is a total of 84 beads in the bag.
(b) How many of the beads are green?

Susie is going to put some more beads in the bag.
There will still be only red beads and green beads in the bag.
Susie wants to have twice as many green beads as red beads in the bag.
(c) What beads should she put in the bag?
You must explain your answer

Answers

Answer:

(a) 5/14

(b) 54 beads

(c) 6 green beads

Step-by-step explanation:

(a) Find the total number of units for red and green beads.

5 + 9 = 14

Since red beads is 5, it is 5/14.

(b) Find the units for red and green beads altogether.

5 + 9 = 14

14 units = 84 beads

Find one unit.

1 unit = 84 ÷ 14 = 6 beads

Since green beads have 9 units, find how many beads there are in 9 units.

9 units = 6 x 9 = 54 beads

(c) As there are 54 green beads and Susie wants to have twice as much green beads as red beads, she have to find how many red beads there are first.

Since red beads have 5 units, find how many beads there are in 5 units.

5 units = 6 x 5 = 30 beads

After that, since she wants twice, she have to find x2 of 30 beads which are red.

30 x 2 = 60

After that, find the remaining amount of green beads needing to make x2 of 30.

60 - 54 = 6 beads (green)

Part(a),

5/14 of the beads are red.

Part(b),

There are 54 green beads in the bag.

Part(c),

Add 18 red beads and 36 green beads to the bag to get the desired ratio.

How to get the solution?

(a) There are five times as many red beads as green beads, or a 5:9 ratio. Therefore, there are 9 green beads in the bag for every 5 red beads. Therefore, the fraction of the beads that are red can be expressed as:

5/(5+9) = 5/14

So, 5/14 of the beads are red.

(b) The bag contains 84 beads, and the proportion of red to green beads is 5:9. Let G equal the number of green beads and R equals the number of red beads. Next, we have:

R/G = 5/9

And we also know that:

R + G = 84

We can use the first equation to express R in terms of G:

R = (5/9)G

This results from substituting this into the second equation:

(5/9)G + G = 84

Simplifying:

(14/9)G = 84

G = (9/14) * 84 = 54

So there are 54 green beads in the bag.

(c) Let's assume that the bag currently contains G-green beads and R red beads. So that there are twice as many green beads as red beads, we wish to add a few more beads.

G = 2R

We also know that the total number of beads in the bag should be:

R + G + X = 84

Where X is the required number of beads. G = 2R is substituted into this equation to produce:

R + 2R + X = 84

3R + X = 84

Finding R and X numbers that meet both this equation and the prerequisite that G = 2R is necessary. One potential answer is:

R = 18, X = 30

This gives:

G = 2R = 36

And:

R + G + X = 18 + 36 + 30 = 84

Hence, to get the correct ratio, we can add 18 red beads and 36 green beads to the bag. There might be other workable alternatives as well, though.

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Which equation represents the slope-intercept form of the line below?
y-intercept = (0,3)
slope = 4
O A. y = 3x + 4
O B. y = 3x - 4
O C. y = 4x-3
D. y = 4x + 3
help asap

Answers

Answer:

D

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = 4 and c = 3, then

y = 4x + 3 → D

Answer:

b

Step-by-step explanation:

PLEASE HELP!!! THIS IS MY LAST QUESTION!! PLEASE(show work)

Answers

Answer:

sign = negative, degree = 5

Step-by-step explanation:

The graph has negative leading coefficient as

x → ∞, y → - ∞

It is of the odd degree, and the degree is most probably 5

NEED THE ANSWER NOWWWWW!!!!!!!!!!!
Graph the following features: Slope = -3 Y-intercept = 4

Answers

Answer:

Step-by-step explanation:

Use Desmos. Y-intercept is 4 so start from there (place a point on (0,4)). From the y-intercept use the slope. -3 technically means three down and one to the right.

y-intercept form --> y= -3x + 4

I need help Finding the perimeter of a towel that measures 2 feet by 34 foot

Answers

Answer:

72 feet

Step-by-step explanation:

multiply 34 by 2 (because there is 2 sides), and multiply 2 by 2 (because there is 2 sides), and you'll get 68 and 4. add them together, and you'll get 72.

2cos(2x)=6sinx+1
Simplify

Answers

Answer:

x=0.15197212 +2 pie n, 9.27280583 + 2 pie n for any integer n.

Winston has $200. He spends 20% of his money on a pair of shoes. how much money did he spend on the pairs of shoes?

Answers

Answer:

$40

Step-by-step explanation:

200 - 20% = 160

200 - 160 = 40

Answer:

40 dollas!!!! if your on k12 anything its 40

Step-by-step explanation:

amy has 24 dolls, 18 of her dolls have blond hair and the rest have black what is the ratio of the number of dolls that have black hair to the number of dolls that have blond haie

Answers

Answer: 6 : 24 is for black haired and 18 : 24 is for blond

Step-by-step explanation:

18 : 24

24 - 18 = # of black haired dolls

6 = # of black haired dolls

Ratio

6 : 24

answer choices
A. -4
B. 5.8
C.4
D.8​

Answers

Answer:

the answer is C (4)

13 of snow fell in 9 hours. Write the number of inches per hour?

Answers

Answer:

1.44

Step-by-step explanation:

All you have to do is divide 13 by 9 and get 1.44, that is how much snow fell in 1 hour

pls mark brainliest

The employees van assemble 1,576 cell phones in 8 hours.
If these employees continue to work at the same rate,how many cell phones will they assemble in 53hours?
A - 12,608
B - 10,441
C - 83,528
D - 70,920

Answers

Answer:

10,441

Step-by-step explanation:

1576/8=197

197x8=10,441

NEED HELPP CORRECTT ANSWERS AND WILL GIVE THANKS AND MARK BRAINLIST ONLY FOR CORRECT ANSWER

Answers

4,20

i think that the answer

Justin can replace three windows in an 8 hour day. How many hours will he need to replace 20 windows on a house

Answers

it would take him 50 hours

A washing machine uses 40 gallons of water to wash 5 loads of laundry. The amount of water used varies directly with the number of loads of laundry. How many gallons of water would be used to wash 12 loads

Answers

Divide 40 by 5 to give you your gallons per load. Then multiply this result by 12 to get how many gallons you would use.
Mathematically:
40gal/5loads = 8gal/load
12loads x 8gal/load = 96gal

a triangle has side length of 10 inches, 24 inches, and 26 inches. Is the triangle a right triangle

Answers

Answer:

yes!

Step-by-step explanation:

one side is longer than the other then the 10 inch line is used to connect them!

(hope this helps)

*giggling*


❤️✨



Why’s it saying it’s too short?

Answers

Answer:

-15(7/20) = -307/20 = -15.35, which is less than -15.

Step-by-step explanation:

Aight

Answer:

>

Step-by-step explanation:

-15(7/20) = -307/20 = -15.35, which is less than -15.

HELP ASAP!!!!!!!!!!!!

Answers

Answer:

It would be the second one, angle A would equal angle F

Step-by-step explanation:

They are both in the same position. A is the first one in the sequence ABC and F is the first one in the sequence FED

does anybody know this ?

Answers

Answer:

37 degrees

Step-by-step explanation:

First, solve for the angle beside 152 degrees. Subtract 180 to 152 and you get 28 degrees. Next, we add 28 degrees to 115 degrees, which is 143 degrees. After, we subtract 143 from 180 (since the total angle of a triangle is 180) and we arrive at 37 degrees.

Brainliest for the correct answer!

Answers

Step-by-step explanation:

(4z +9) + ( 9y - 2) =180

4z + 9y = 173 ....... Equation 1

The angles of triangle = 180

We miss one angle and in opposite of that angle is 135 so

( 5y +5 +4z +9)+135 = 180

5y + 4z + 149 = 180

5y + 4z = 31 ....... Equation 2

Subtract between two equations 1 & 2

4y = 142

y = 142/4

y = 35.5

KAMAKURA KAMAKUARA YASS QUEEN ✨Anywaysss.. help me, I know this but I’m too lazy to do it, DKSKSK

Answers

Answer:

a= 6 7/8

Step-by-step explanation:

I really need this quick plz

Answers

Answer:

C=8

Step-by-step explanation:

PLEASE ANSWER ASAP !!!!! WILL GIVE BRAINLIEST

Answers

Answer:

*answers*

Step-by-step explanation:

u just answer it

Answer:

1

Step-by-step explanation:

All sweaters at a store are on sale at the same percent discount. A sweater that is regularly priced at $32.00 is on sale for $25.60. What is the sale price of a sweater regularly priced at $28.00?

Answers

Answer:

$22.40

Step-by-step explanation:

32 - 25.60 = 6.40

6.40/32 = 0.2

0.2 X 100 = 20%

100 - 20 = 80

28/100 X 80 = 22.40

*inhale* AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

Answers

Answer:

ANSWER IS CAUSE ONES A NEG AND ONES A POSITIVE HAPPY TO HELP

Step-by-step explanation:

What is the best prediction of the amount of money earned when the lemonade stand has been open for 9 hours

Answers

Answer:  $50

Step-by-step explanation:  Draw a line through the apparent center of the scattered dots. See where that line intersects 9 in the time scale (x-axis numbers) and the dollars earned scale (y-axis numbers)

It could be 50 or 55, but since there are a few more dots below the apparent midline, it may be best to use the lower estimate.

convert 0.11 to a percentage

NEED TO BE ANSWERED ASAP
I will award them the brainliest ​

Answers

Answer:

11%

Step-by-step explanation:

0.11*100=11%

necause 1%=1/100

11% = 0.11 :) hope this helps
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