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luffybunny
25.09.2021 •
Mathematics
5x + 2y = 9
2x — Зу = 15
Solve
Solved
Show answers
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Ответ:
{x,y} = {3,-3}
Step-by-step explanation:
[2] 2x = 3y + 15
[2] x = 3y/2 + 15/2
// Plug this in for variable x in equation [1]
[1] 5•(3y/2+15/2) + 2y = 9
[1] 19y/2 = -57/2
[1] 19y = -57
// Solve equation [1] for the variable y
[1] 19y = - 57
[1] y = - 3
// By now we know this much :
x = 3y/2+15/2
y = -3
// Use the y value to solve for x
x = (3/2)(-3)+15/2 = 3
let me know if this helps c:
Ответ:
1. y=-5/2x+9/2
2.not solveable
Step-by-step explanation:
1. move x over (2y=-5x+9) 2.divide both sides by 2, to get y by itself (y=-5/2x+9/2)
2. Error couldn't solve
(hope this helps can I pls have brainlist (crown) ☺️)
Ответ:
6.64 mph (rounded)