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sp2606 [1]
3 years ago
7

-2x -3y = 8 -2x + 4y = 22

Mathematics
2 answers:
Olin [163]3 years ago
6 0
<span>Do you need any explanation? but this is the answer x=<span>−<span><span>7<span> and </span></span>y</span></span></span>=<span>2</span>
Naddika [18.5K]3 years ago
4 0
-2x + 4y = 22
-2x - 3y = 8

Subtract 2nd from 1st equation, 
7y = 14
y = 14/7 = 2

Substitute it in 1st equation, 
-2x + 4(2) = 22
-2x = 22 - 8
x = -14/2
x = -7

In short, Your Answer would be (-7, 2)

Hope this helps!
You might be interested in
5. Priya mixes 2..5 cups of water with 1/3 cup or orange juice concentrate. Diego mixes 1 2/3 cups of water with 1/4 cup or oran
Snowcat [4.5K]

Priya needs 13⅓ cups of orange juice

Diego 15 cups

Step-by-step explanation:

......................................................................................................................

Priya

......................................................................................................................

Cup of water = 2½

Cup of orange = ⅓

If 2½ cups of water requires ½ cup of orange juice concentrate

Then 100 cups of water would require x cup of orange

Representing the above statement mathematically

2½ : ⅓ = 100 : x

5/2 : 1/3 = 100 : x ------------------Convert ratio sign to division

5/2 ÷⅓ = 100/x

5/2 * 3 = 100/x

15/2 = 100/x ---------------Multiply both sides by x

15/2 * x = 100/x * x

15x/2 = 100 ------------------ Multiply both sides by 2

2 * 15x/2 = 2 * 100

15x = 200 --------------- Divide both sides by 15

x = 200/15

x = 13⅓

So, 13⅓ cups of orange is needed by Priya

......................................................................................................................

Diego

......................................................................................................................

Cup of water = 1⅔

Cup of orange = ¼

If 1⅔ cups of water requires ¼ cup of orange juice concentrate

Then 100 cups of water would require x cup of orange

Representing the above statement mathematically

1⅔:¼ = 100:x

5/3 : ¼ = 100:x

5/3 ÷¼ = 100 ÷ x

5/3 * 4/1 = 100 ÷ x

20/3 =100/x----------------------- Multiply x to both sides

20/3 * x = 100/x * x

20x/3 = 100 ------------------------ Multiply 3 to sides by 3

3 * 20x/3 = 100 * 3

20x = 300 ------------- Divide both sides by 2

20x/20 = 300/20

x = 15

So, 15 cups of orange is needed by Diego

6 0
3 years ago
Alisha asked 120 students what kind of pet they liked the most. Exactly 45% of the students said they liked dogs best. What was
7nadin3 [17]

Answer: 54 liked best

Step-by-step explanation: None

8 0
3 years ago
Read 2 more answers
How many terms are in the expression 2m²n + 2mn² - m + 3n + 9​
IgorC [24]

Answer:

12 constant terms and 12 variable terms

Step-by-step explanation:

6 0
3 years ago
So I have a math presentation in a couple of minutes do you have any advice to boost my confidence?
Sedaia [141]

Answer:

keep calm and believe in yourself

3 0
3 years ago
The bottom of a doorway to a building is 3.45 feet above the ground, and a ramp to the door for the disabled is at an angle of 6
Darya [45]

Answer:

The ramp should be 32.9 feet longer.

Step-by-step explanation:

When the ramp is at 6^{o} to the ground, its length can be determined by applying the appropriate trigonometric function. Let the length be represented by l, so that;

Sin θ = \frac{opposite}{hypotenuse}

Sin 6^{o} = \frac{3.45}{l}

l = \frac{3.45}{Sin 6^{o} }

 = \frac{3.45}{0.10453}

 = 33.0048

l = 33.0 feet

When the angle is reduced to 3^{o}, the length of the ramp would be;

Sin θ = \frac{opposite}{hypotenuse}

Sin 3^{o} = \frac{3.45}{l}

l = \frac{3.45}{Sin 3^{o} }

 = \frac{3.45}{0.05234}

= 65.9152

l = 65.9 feet

Change in length of ramp = 65.9 - 33.0

                            = 32.9

The ramp should be 32.9 feet longer.

5 0
3 years ago
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