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kvv77 [185]
3 years ago
9

I need help with my math homework from The Hung Vuong Learning Centre Incorporated, like immediately please!!! Here is an image

for you to answer the questions will receive the Brainliest award if you answer the questions completely! Well anyways, good luck on answering the questions and I will check the answers are appropriate! :)

Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
8 0

Answer:

2. d) L = 10, W = 20

3. c) P = 100

Step-by-step explanation:

2. 2L + W = 40

W = 40 - 2L

A = L x W

= L (40 - 2L)

= 2L^2 + 40L

=-2 (L^2 - 20L)

= -2 (L^2 - 20^2 + 100 - 100)

= -2 (L^2 - 20L + 100) +200

= -2 (L - 10)^2 +200

L = 10

W = 40 - 2(10

=20

3. c. P = 2(L + W)

= 2(49 + 1)

= 100

a. P = 53

b. P = 32.5

d. P = 28

DIA [1.3K]3 years ago
7 0

Answer:

Give me some hint please

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kirza4 [7]

Answer:

Step-by-step explanation:If we add the first and second equations, we will eliminate both the x and the y.

(2x + y + z) + (2x - y - z) = (3) + (9)

2x + y + z + 2x - y - z = 3 + 9

4x = 12

x = 3

So, x must equal 3.

Now, if we put 3 into each equation, we have the following equations:

6 + y + z = 3

6 - y - z = 9

3 + y - z = 0

Now, we can move all the numbers to the right side:

y + z = -3

-y - z = 3

y - z = -3

Now, we can try to eliminate another variable. If we add the second two equations, we can eliminate y.

(-y - z) + (y - z) = (3) + (-3)

-y -z + y - z = 0

-2z = 0

z = 0 (because, if we divide both sides by -2 to isolate z, 0/[-2] = 0)

So, now we have x = 3 & z = 0.

Now, pick any of the original equations and plug these values of x & z in, and you will get y.

2x + y + z = 3

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Marina CMI [18]
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Classify the system of equations 2x + y - 7 = 0 1/3 x + y - 4 = 0
KATRIN_1 [288]

Answer:

B

Step-by-step explanation:

The equations are:

2x + y - 7 = 0

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1/3x + y -4 = 0

Let's rearrange the first to get:

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Putting this into the 2nd equation we get:

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Answer choice B is right.

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Step-by-step explanation:

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