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2 years ago

Solve the system by substitution

Mathematics

1 answer:

olganol [36]2 years ago

6 0

Answer:

-2

Step-by-step explanation:

$y = - 6x \\ y = - 4x + 4 \\ then \: substitute \\ - 6x = - 4x + 4 \\ - 6x + 4x = 4 \\ - 2x = 4 \\ \frac{ - 2x}{ - 2} = \frac{4}{ - 2} \\ then \: - 2 \: cancel \: by \: - 2 \\ x = - 2$

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What is the slope / rate of change for 2, 5 and -3, 7

Nady [450]

Answer:

$\displaystyle m=\frac{-2}{5}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS 

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinates (x, y)
Slope Formula: $\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Point (2, 5)

Point (-3, 7)

Step 2: Identify

x₁ = 2, y₁ = 5

x₂ = -3, y₂ = 7

Step 3: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

Substitute in points [Slope Formula]: $\displaystyle m=\frac{7-5}{-3-2}$
[Slope] [Fraction] Subtract: $\displaystyle m=\frac{2}{-5}$
[Slope] [Fraction] Rewrite: $\displaystyle m=\frac{-2}{5}$

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3 years ago

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Lelu [443]

Answer:

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Step-by-step explanation:

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3 years ago

Circle A has center of (4, 5), and a radius of 3 and circle B has a center of (1, 7), and a radius of 9.

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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amm1812

Answer:

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Step-by-step explanation:

7 0

3 years ago