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just olya [345]
3 years ago
10

Use elimination to solve and match each system of equations to the correct solution. 3x+y=11 5x-y=21 Help with this one I’ll giv

e u brainliest
Mathematics
1 answer:
lora16 [44]3 years ago
6 0

Answer:

Step-by-step explanation:

3x + y = 11

5x - y = 21

8x = 32

x = 4

3(4) + y = 11

12 + y = 11

y = -1

(4, -1)

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Calculate the distance between the points J=(-3, 2) and K=(2, -2) in the coordinate plane.
Pavlova-9 [17]

Answer:

\sqrt{41}

Step-by-step explanation:

Hello!

In order to answer this question, we need to use the distance formula.

\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

The order of these points can be chosen in any way, but they need to be done in the same pair (just like when you find the slope).

For this problem, let's let the J pair be the x_2, y_2 pair and the K pair be the x_1,y_1 pair.

x_2 = -3

x_1 = 2

y_2 = 2

y_1 = -2

Now, let's plug these points in.

\sqrt{(-3-2)^2+(2-(-2))^2}

\sqrt{(-3-2)^2+(2+2)^2}

\sqrt{(-5)^2+(4)^2}

\sqrt{25+16}

\sqrt{41}

Thus, the distance between points (-3,2) and (2,-2) is \sqrt{41}.  

4 0
3 years ago
3-2(x + 1)=2x-7<br> SOLVE AND HOW MANY SOLUTIONS ?
jekas [21]

Answer:

2

Step-by-step explanation:

3−2(x+1)=2x−7

3+(−2)(x)+(−2)(1)=2x+−7(Distribute)

3+−2x+−2=2x+−7

(−2x)+(3+−2)=2x−7(Combine Like Terms)

−2x+1=2x−7

−2x+1=2x−7

Step 2: Subtract 2x from both sides.

−2x+1−2x=2x−7−2x

−4x+1=−7

Step 3: Subtract 1 from both sides.

−4x+1−1=−7−1

−4x=−8

Step 4: Divide both sides by -4.

−4x−4=−8−4

x=2

5 0
3 years ago
Substances that are made of just one kind of atom are ____ .
makvit [3.9K]
Elements, they’re a pure substance and can’t be broken down into simpler substances.
5 0
2 years ago
One way to convert from inches to centimeters is to multiply the number of inches by 2.54, How many centimeters are there in ⅕ i
erica [24]

Answer:

  0.508 cm

Step-by-step explanation:

Your problem statement tells you that you can find the number of centimeters by multiplying 1/5 inch by 2.54 cm/in:

  1/5 × 2.54 = 0.508

1/5 inch is 0.508 centimeters

5 0
2 years ago
Read 2 more answers
Find the prime factorization of 36
Dmitrij [34]

prime factoring, oddly enough, is simply dividing by primes, anyhow, without much adieu.

36 = 2 * 2 * 3 * 3.


but anyway, prime factoring, is dividing by first 2, till you can't, then 3 till you can't, then 5 till you can't, and so on, and that plucks out all possible factors on any number.

7 0
3 years ago
Read 2 more answers
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