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2 years ago

Plz help me asnwer this

Mathematics

2 answers:

Daniel [21]2 years ago

8 0

Answer:

x= 0

y= -3

Step-by-step explanation:

6x-5y=15

substitution...

6(y+3)-5y=15

6y+18-5y=15

y+18=15

-18 -18

y= -3

substitution again...

6x-5(-3)=15

6x+15=15

-15 -15

6x=0

/6 /6

x= 0

nignag [31]2 years ago

5 0

Answer:

(0, -3)

x = 0

y = -3

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define systems

6x - 5y = 15

x = y + 3

Step 2: Solve for y

Substitution

Substitute in x: 6(y + 3) - 5y = 15
Distribute 6: 6y + 18 - 5y = 15
Combine like terms: y + 18 = 15
Isolate y: y = -3

Step 3: Solve for x

Define original equation: x = y + 3
Substitute in y: x = -3 + 3
Add: x = 0

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3 years ago

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Two of your friends, Matt and Karen, both run to you to settle a dispute. They were working on a math problem, and got different

Anna11 [10]

So in matt's equation, he made a mistake in the a transision from line 2 to line 3
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also from lines 5 to 6 he made a mistake in order of opperations (mulit division then addition and subtract)
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2 years ago

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Which of these sets could represent the side lengths of a right triangle?

Jlenok [28]

Answer:

{6, 8, 10} is a set which represents the side length of a right triangle.

Step-by-step explanation:

In a right triangle:

$(Base)^{2} + (Perpendicular)^{2} = (Hypotenuse)^{2}$

Now, in the given triplets:

(a) {4, 8, 12}

Here, $(4)^{2} + (8)^{2} = 16 + 64 = 80\\\implies H = \sqrt{80} = 8.94$

So, third side of the triangle 8.94 ≠ 12

Hence, {4, 8, 12} is NOT a triplet.

(b) {6, 8, 10}

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So, third side of the triangle 10

Hence, {6, 8, 10} is a triplet.

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So, third side of the triangle 10 ≠ 15

Hence, {6, 8, 15} is NOT a triplet.

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Here, $(5)^{2} + (7)^{2} = 25 + 49 = 74\\\implies H = \sqrt{74} = 8.60$

So, third side of the triangle 8.60 ≠ 13

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3 years ago

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Dmitry [639]

Answer:

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