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3 years ago

Pls help me with these 2 math question will mark brainiest.

Mathematics

2 answers:

nika2105 [10]3 years ago

8 0

Answer:

3) B

4) A

Step-by-step explanation:

Formula: $y = mx + b$

Slope: $\frac{-3 - 1}{-4 - (-2)} =2$

Next, I substituted the numbers from both the chart and the slope.

$y=2x+b$

$(x, y) --> (1, 7)$

$\\7=2(1)+b\\$

$7=2+b$

$b=5\\$

Your final equation should be, $y=2x+5$ .

From the graph you can see (0, 4) is the y-intercept and the spaces are moving up twice and once to the right, making the slope 2.

Your answer should be, $y=2x+4$ .

zalisa [80]3 years ago

6 0

I’m not sure what the first one is, but number 4 is A) y=2x+4

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Answer:

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The equation of the line with slope 'm' and given a point (x₁, y₁) passing through it we use the Slope - one - point form which is given by:

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We get the equation of the line to be:

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3 years ago

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3 years ago

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3 years ago

If -y-2x^3=Y^2 then find D^2y/dx^2 at the point (-1,-2) in simplest form

algol13

Answer:

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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

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Calculus

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Chain Rule: $\frac{d}{dx}[f(g(x))] =f'(g(x)) \cdot g'(x)$

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Step-by-step explanation:

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Step 3: Differentiate Pt. 2

Find 2nd Derivative

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[Derivative] Back-Substitute y': $y'' = \frac{-24xy-12x+12x^2(\frac{-6x^2}{2y+1} )}{(2y+1)^2}$
[Derivative] Simplify: $y'' = \frac{-24xy-12x-\frac{72x^4}{2y+1} }{(2y+1)^2}$

Step 4: Find Slope at Given Point

[Algebra] Substitute in x and y: $y''(-1,-2) = \frac{-24(-1)(-2)-12(-1)-\frac{72(-1)^4}{2(-2)+1} }{(2(-2)+1)^2}$
[Pre-Algebra] Exponents: $y''(-1,-2) = \frac{-24(-1)(-2)-12(-1)-\frac{72(1)}{2(-2)+1} }{(2(-2)+1)^2}$
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