Answer:
1100/3
Step-by-step explanation:
Answer:
x=-3
y=4
Step-by-step explanation:
2x-y=-10
y=4
Substitute y = 4 into the first equation
2x-(4) = -10
2x -4 = -10
Add 4 to each side
2x-4+4 = -10+4
2x = -6
Divide each side by 2
2x/2 = -6/2
x =-3
Answer:
What is the question Lma/o
Step-by-step explanation:
<h3>
Answer: C) 4</h3>
============================
Work Shown:
Expand out the left hand side
(x-k)(x-5)
x(x-5)-k(x-5)
x^2-5x-kx+5k
Note that the constant term here is 5k. Yes k seems like a variable, but it's actually a constant. Once we know k, we can replace it to get a fixed number. In this case, k = 4 since 5k = 5*4 = 20 to have it match with the 20 at the end of x^2-9x+20
For the x terms, we have -5x-kx = -5x-4x = -9x which matches with the middle term of x^2-9x+20
Therefore,
(x-k)(x-5) = x^2-9x+20
updates to
(x-4)(x-5) = x^2-9x+20
The -4 and -5 multiply to 20, and they also add to -9. This helps confirm we have the right k value.
Answer:
11x + 3
Step-by-step explanation:
3/5(10x+5)5
6x+3+5x
6x+5x+3
11x+3