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Feliz [49]
3 years ago
11

3x+y=15 3x-y=15 (using elimination method)

Mathematics
2 answers:
morpeh [17]3 years ago
5 0

Answer:

x = 5

y = 0

Step-by-step explanation:

3x + y = 15

3x -y = 15

Add the two equations;

6x = 30

Inverse operations;

6x = 30

/6        /6

x = 5

Back substitute;

3(5) + y = 15

15 + y = 15

y = 0

Yanka [14]3 years ago
4 0

Answer:

Step-by-step explanation:

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11 cm<br> 1 cm<br> What is the volume
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Answer & Explanation:

Volume can be expressed in cubic centimeters, or in milliliters. One milliliter is equal to one cubic centimeter, or one cc, for short. If your initial measurements are given in inches, multiply them by 2.54 to convert them to centimeters.

7 0
3 years ago
Please help! I need help with part B if 1000 students were surveyed what would the probability be of how many plays sports?
nevsk [136]

Answer:

188 students would play sports, out of 1,000.

Step-by-step explanation:

If the probability that a random high school student plays a sport is 0.188 (150/800), which means for every 1 high school student 0.188 of them play a sport. Multiply 0.188x1,000 to get 188 students who play a sport.

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3 years ago
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Do we use Pythagorean theorem to find missing sides or missing angles in a right triangle
Marina86 [1]
To find missing lengths of sides
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8 0
3 years ago
What is x. Please show *all* the steps.
Zolol [24]

The equation 5/2 - x + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0 is a quadratic equation

The value of x is 8 or 1

<h3>How to determine the value of x?</h3>

The equation is given as:

5/2 - x + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0

Rewrite as:

-5/x - 2 + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0

Take the  LCM

[-5(x + 2) + (x -5)(x- 2)]\[x^2 - 4 + [3x + 8]/[x^2 - 4] = 0

Expand

[-5x - 10 + x^2 - 7x + 10]/[x^2 - 4] + [3x + 8]/[x^2 - 4] = 0

Evaluate the like terms

[x^2 - 12x]/[x^2 - 4] + [3x + 8]/[x^2 - 4 = 0

Multiply through by x^2 - 4

x^2 - 12x+ 3x + 8 = 0

Evaluate the like terms

x^2 -9x + 8 = 0

Expand

x^2 -x - 8x + 8 = 0

Factorize

x(x -1) - 8(x - 1) = 0

Factor out x - 1

(x -8)(x - 1) = 0

Solve for x

x = 8 or x = 1

Hence, the value of x is 8 or 1

Read more about equations at:

brainly.com/question/2972832

8 0
2 years ago
A garden table and bench cost $450. The cost of the table is two times the cost of the bench. What is the cost of the bench?
ipn [44]

Answer:

300 150

Step-by-step explanation:

The price of the garden table is two times the price of the bench. What is the cost of the bench? x=150 for the bench. 2*150=300 for the table.

4 0
3 years ago
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