Solve the the equation by substitution5x=-2y+48x=-3y+20

Mathematics

1 answer:

tamaranim1 [39]2 years ago

8 0

Answer:

(8, 4)

Step-by-step explanation:

i hope this helps :)

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-7 (-7)^-4 plz help plz

Natali5045456 [20]

Answer: -1/343

Step-by-step explanation:

-7(-7)^-4

First, re-write as positive exponents:

-7(-1/7^4)

Next, simplify:

-1/7^3 (you can simplify using exponent rules)

Simplify 7^3 :

7(7)(7)

49(7)

343.

Insert to original expression:

-1/343.

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3 years ago

Are all vertical lines parallel?

BartSMP [9]

Answer: Yes

Step-by-step explanation: All vertical lines have the same slope and because of that they are always parallel.

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2/5 y + 1/5 x - 0.26- 6+ (-2)

Lina20 [59]

Answer:

Simplified

2/5y + 1/5x - 413/50

0.4y + 0.2 x - 8.26

Step-by-step explanation:

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2 years ago

What is the equation in vertex

jok3333 [9.3K]

$\bf ~~~~~~\textit{vertical parabola vertex form} \\\\ y=a(x- h)^2+ k\qquad \begin{cases} \stackrel{vertex}{(h,k)}\\\\ \stackrel{"a"~is~negative}{ope ns~\cap}\qquad \stackrel{"a"~is~positive}{op ens~\cup} \end{cases} \\\\[-0.35em] \rule{34em}{0.25pt}$

$\bf \stackrel{\textit{vertex}}{(3,-2)}~~ \begin{cases} h = 3\\ k = -2 \end{cases}\implies y=a(x-3)^2-2 \\\\\\ \stackrel{\textit{passes through}}{(5,-1)}~~ \begin{cases} x=5\\ y= -1 \end{cases}\implies -1=a(5-3)^2-2\implies 1=a(2)^2 \\\\\\ 1=4a\implies \cfrac{1}{4}=a~\hfill \boxed{y=\cfrac{1}{4}(x-3)^2-2}$