Answer:
k= -5
Step-by-step explanation:
When x=1 and y= -2,
x-2y+k=0
1 -2(-2)+ k=0
1+4+k=0
5+k=0
k= -5
I’m not sure what e is in your equation. But I think the answer is t=5000 months. Let me know if you need an explanation
Answer:
The answer is C: cos(x)= 10/15.
Step-by-step explanation:
ed2020
Answer:
The number = 45
Step-by-step explanation:
Let the 10s digit = x
Let the units digit = y
10*x + y = 5(x + y) Start here: remove the brackets
10*x + y + 9 = 10y + x Subtract y and 10x from both sides
Using the first equation
10x + y = 5x + 5y
5x + y - 5y = 0
5x - 4y = 0
5x = 4y
y = 5/4x
From the second equation
9 = 9y - 9x
1 = y - x Substitute y = 5/4 x
1 = 5/4x - x
1 = 1/4 x
x = 4
y = 5/4 * 4
y = 5.
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