Answer:
The solution is (-2,4)
Step-by-step explanation:
We'll solve the system
2x+5y=16
-5x-2y=2
using elimination by addition and subtraction.
Let's eliminate x first. To do this, multiply the first equation by 5 and multiply the second equation by 2. We get:
10x + 25y = 80
-10x - 4y = 4
----------------------
21y = 84. Thus, y = 84/21 = 4.
Subbing 4 for y in the second equation, we get
-5x -2(4) = 2, or
-8 - 2 = 5x, or
-10 = 5x. Thus, x = -10/5 = -2.
The solution is (-2,4)
Answer:
-3x^2 -( 4x^2 -x) = -3x^2 - 4x^2 +x = -7x^2 +x
Step-by-step explanation:
Answer:
4 river dragons
Step-by-step explanation:
1 : 3 = x : 12
(1 x 4) : (3 x 4) = x : 12
4 : 12 = x : 12
x = 4
Answer:
I'm pretty sure its C but some please correct me if I'm wrong.
Answer:
6 cm
Step-by-step explanation:
