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4 years ago

PLEASE HELP !!!!!!!!!!

Mathematics

1 answer:

Grace [21]4 years ago

3 0

Answer:

y = -0.5x

Step-by-step explanation:

To write the equation of the line, use the formula y = mx where m is the slope. Find the slope by subtracting the x and y coordinates. Use the formula below:

$m = \frac{y_2-y_1}{x_2-x_1} = \frac{2--1}{-4 - 2} = \frac{3}{-6} = -\frac{1}{2}$

Since the slope is -1/2 or -0.5, this means the equation of the line is y = -0.5x.

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Simplify the expression 2.75j + 2.25 - 1.5j + 3

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3 years ago

Subtract polynomials (intro)

ELEN [110]

Answer:

The result in standard form is:

$\left(-5t+4t^2-t\right)-\left(8t^2+t\right)=-4t^2-7t$

Step-by-step explanation:

Given the polynomials

-5t+ 4t² – t

8t² + t

subtracting 8t² + t from -5t+ 4t² – t.

$\left(-5t+\:4t^2\:-\:t\right)\:-\:\left(8t^2\:+\:t\right)$

Remove parenthese: (-a) = -a

i.e. - (8t² + t) = 8t² - t

so the expression becomes

$=-5t+4t^2-t-8t^2-t$

grouping the like terms

$=4t^2-8t^2-5t-t-t$

Add similar elements: 4t² - 8t² = -4t²

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Therefore, the result in standard form is:

$\left(-5t+4t^2-t\right)-\left(8t^2+t\right)=-4t^2-7t$

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3 years ago

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4 years ago

-6x+5y=1 and 6x+4y=10.substitution

nexus9112 [7]

Answer:

(23/27, 11/9)

Step-by-step explanation:

Given the simultaneous equation;

-6x+5y=1..... 1

6x+4y=10.... 2

Add both equations

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y = 11/9

Substitute y = 11/9 into 1;

From 1;

-6x+5y=1.

-6x + 5(11/9) = 1

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All together for this one?

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4 years ago

PLEASE HELP !!!!!!!!!!​

PLEASE HELP !!!!!!!!!!