Answer:
a
Step-by-step explanation:
y = 3x - 7 → (1)
4x - 5y = - 20 → (2)
substitute y = 3x - 7 into (2)
4x - 5(3x - 7) = - 20
4x - 15x + 35 = - 20
- 11x + 35 = - 20 ( subtract 35 from both sides )
- 11x = - 55 ( divide both sides by - 11 )
x = 5
substitute x = 5 into (1)
y = 3(5) - 7 = 15 - 7 = 8
solution is (5, 8 )
Answer:
you can't solve for the pythagorean theorem
Step-by-step explanation:
tyhe theorem is a theorem not a math problem
but you can just do sqrt(a^2+b^2) to get c
use desmo, wolfrm, gegebra, symblab, mahway etc
Answer:
x = -2
Step-by-step explanation:
Eliminate parentheses and collect terms.
1 +8x +5 -4x = 2(x -3) -2(x -2) . . . . . given
6 +4x = 2x -6 -2x +4
6 + 4x = -2
4x = -8 . . . . . subtract 6
x = -2 . . . . . . divide by 4
Use bidmas9 + 4*42 - 5
9 + 168 - 5
172
The answer is 300000+9000+10+7