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2 years ago

Find the equation of the line through (-8,-7) and (0,-9)

Mathematics

2 answers:

stira [4]2 years ago

6 0

What is the formula for this equation?

postnew [5]2 years ago

5 0

If the equation of the line is linear function, then the solution consist of theese steps:
1. equation of line y=kx+b, where k and b - numbers, x and y coordinates of points.
2. using the equation of the line it is possible to substitute coordinates of points into equation:
$\left \{ {{-7=-8*k+b} \atop {-9=0*k+b}} \right. \ =\ \textgreater \ \ \left \{ {{-8k+b=-7} \atop {b=-9}} \right. \ =\ \textgreater \ \ \left \{ {{k=- \frac{1}{4}} \atop {b=-9}} \right.$
3. the equation is:
$y=- \frac{1}{4}x-9$

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sergeinik [125]

Answer:

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7 0

2 years ago

Plz help and show how you did the math question

Nikitich [7]

Answer:

$x = - 3$

$y = - 2$

Step-by-step explanation:

Since y=x+1 plug it into bottom equation as y.

$x + 1= 5x + 13$

Subtract 1 from both sides

$x = 5x + 12$

Subtract 5x from both sides

$- 4x = 12$

Divide both sides by -4

$x = - 3$

Now x=-3 into the top equation to find y

$- 3 + 1 = - 2$

y=-2

8 0

2 years ago

Y= -2x+3 fill in the table using this function rule.

sp2606 [1]

Answer:

there is no table!

Step-by-step explanation:

7 0

3 years ago

Rewrite in Polar Form....<br> x^(2)+y^(2)-6y-8=0

skad [1K]

$\bf x^2+y^2-6y-8=0\qquad 
\begin{cases}
x^2+y^2=r^2\\\\
y=rsin(\theta)
\end{cases}\implies r^2-6rsin(\theta)=8
\\\\\\
\textit{now, we do some grouping}\implies [r^2-6rsin(\theta)]=8
\\\\\\\
[r^2-6rsin(\theta)+\boxed{?}^2]=8\impliedby 
\begin{array}{llll}
\textit{so we need a value there to make}\\
\textit{a perfect square trinomial}
\end{array}$

$\bf 6rsin(\theta)\iff 2\cdot r\cdot \boxed{3\cdot sin(\theta)}\impliedby \textit{so there}
\\\\\\
\textit{now, bear in mind we're just borrowing from zero, 0}
\\\\
\textit{so if we add, \underline{whatever}, we also have to subtract \underline{whatever}}$

$\bf [r^2-6rsin(\theta)\underline{+[3sin(\theta)]^2}]\quad \underline{-[3sin(\theta)]^2}=8\\\\
\left. \qquad \right.\uparrow \\
\textit{so-called "completing the square"}
\\\\\\\
[r-3sin(\theta)]^2=8+[3sin(\theta)]^2\implies [r-3sin(\theta)]^2=8+9sin^2(\theta)
\\\\\\
r-3sin(\theta)=\sqrt{8+9sin^2(\theta)}\implies r=\sqrt{8+9sin^2(\theta)}+3sin(\theta)$

3 0

2 years ago

A basketball league's average score is 58 points per game. Coach McGee tracks a team's average for five weeks and compares

iogann1982 [59]

Answer:

the 2nd option

Step-by-step explanation:

If you change Week 5 into a decimal, you will get -1.8, which is the same as Week 4.

Hope this helps :)

8 0

2 years ago