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White raven [17]
3 years ago
9

Use the elimination method to solve the system of equations. 3x+4y=8 X-Y=12

Mathematics
2 answers:
HACTEHA [7]3 years ago
8 0

Answer: D. (8, -4)

Step-by-step explanation:

3x + 4y = 8 --------------(1)

x - y = 12--------------(2)

eqn(2) × 3

3x - 3y = 36-----------(4)

eqn(4) - eqn(1)

-7y = 28

Divide bothside by -7

y = -4

Again, multiply eqn(2) by 4

4x - 4y = 48 ---------------(5)

eqn(5) + eqn(1)

7x = 56

Divide bothside by 7

x = 8

Therefore x=8 and y=-4

Margarita [4]3 years ago
5 0

STEP 1: Multiply second equation by -3.

After multiplying we have the following system:

3x+4y−3x+3y=8=−36

STEP 2: add the two equations together to eliminate x from the system.

7y=−28

STEP 3: find y

<u>y=−4</u>

<u></u>

STEP 4: substitute the value for y into the original equation to solve for x.

3x+4(−4)=8

<u>x=8</u>

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3 years ago
How do you find the value of 4!
prohojiy [21]

Answer:

24

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Factorial is applicable only for natural numbers and 0.

0! =1 trivially.

FOr other numbers, factorial is defined as 1x2x...n

For example 1! = 1

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and so on.

i.e. n! = product of all natural numbers from 1 to n

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Using the above

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3 0
3 years ago
Carson needs 3 quarts of water to make fruit punch, but has only a l-cup measuring cup.
olga_2 [115]

Answer:

Cups of water she needs to make the punch is 12.

Step-by-step explanation:

Amount of water Carson need to make fruit punch = 3 quarts

2 cups is 1 pint

2  pints is 1 quart

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2 cups is 1 pint which is 1/2 quarts

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7 0
4 years ago
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