gbgirl1985 gbgirl1985

24-11-2020
Mathematics

contestada

I'm doing system of equations and I have to solve using substitution

the equations are y=5x and xy=45

Respuesta :

meowmeow223334 meowmeow223334

24-11-2020

Plug in 5x for y
x(5x) = 45
5x^2 = 45
Divide by 5
x^2 = 9
X = 3

Answer Link

lavenderlillacs25 lavenderlillacs25

24-11-2020

Answer: +3, -3

Step-by-step explanation:

ok so all you need to do is plug in that first equation into the second one.

x(5x) = 45

5x^2 = 45

x^2 = 9

x = +3, -3

Answer Link

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