Answer: Choice C) -11
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Explanation:
The first equation given is y = 3 - 1/2x
In other words, y is the same as 3 - 1/2x.
We can replace y in the second equation with 3 - 1/2x
This is known as substitution (think of a substitute teacher who is a temporary replacement for your teacher)
Doing this leads to...
3x+4y = 1
3x+4*y = 1
3x+4*( y ) = 1
3x+4*( 3 - 1/2x ) = 1 <<--- y has been replaced with 3-1/2x
3x+4*(3) +4*(-1/2x) = 1
3x+12-2x = 1
3x-2x+12 = 1
x+12 = 1
x+12-12 = 1-12 <<-- subtracting 12 from both sides
x = -11
Which is why the answer is choice C) -11
Answer:
It's the percent word problem...
So, first you need to find how much will the price increase:
1)6.6% of 48,000$=6.6÷100=0.066×48,000=3168$
3168$- is the price that will increase.
2)48,000+3168=51,168 $- the next price
Answer: the price of the next model will be 51,168 $.
Good luck!
Intelligent Muslim,
From Uzbekistan.
X-4y=7 Answer:1/4
2x+y=5
2x+y=5 I am not sure but I’m pretty sure the answer is -2
