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2 years ago

The equation y-3=-2(x+5) is written in point-slope form. What is the y-intercept of the line?

Mathematics

2 answers:

yan [13]2 years ago

3 0

Answer:

y = - 7

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

y - 3 = - 2(x + 5) ← distribute right side

y - 3 = - 2x - 10 ( add 3 to both sides )

y = - 2x - 7 ← in slope- intercept form

with y- intercept c = - 7

DENIUS [597]2 years ago

3 0

Answer: -7

Step-by-step explanation: $$$$$

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Read 2 more answers

2.<br> Which of the functions below is an inverse of the quadratic function f(x) = x2 - 3 ?

mezya [45]

Answer:

the inverse of the quadratic function $f(x) = x^2 - 3$ is $\mathbf{f^{-1}(x)=\pm \sqrt{x+3}}$

Step-by-step explanation:

We need to find inverse of the quadratic function $f(x) = x^2 - 3$

Let

$y=x^2-3$

Replace x and y

$x=y^2-3$

Now, we will solve for y

Adding 3 on both sides

$x+3=y^2-3+3$

$x+3=y^2$

Taking square root on both sides

$\sqrt{y^2}=\sqrt{x+3}\\y=\pm \sqrt{x+3}$

Now replace y with $f^{-1}(x)$

$f^{-1}(x)=\pm \sqrt{x+3}$

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2 years ago

1. Find the slope of the line:

Flura [38]

Answer:

Step-by-step explanation:

Slope=rise/run

=4 blocks/ 1 block

Since 1 block=5 units,

slope= $\frac{5\times 4}{1}=20$

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