2x+y=-4
5x+3y=-6
multiply first equaton by -5 and second by 2 then add them
-10x-5y=20
<u>10x+6y=-12 +</u>
0x+1y=8
y=8
the y value is 8
C and D
x^2 - 4x + 4 = (x-2)^2
x^2 + 10x +25 = (x+5)^2
'y' is NOT the number of chairs in each row and column. It's the TOTAL number of
chairs, so it's the product of (chairs in each row) times (chairs in each column).
The problem says that those numbers are equal. So we would expect the TOTAL
to be a perfect square, and the number in each row and each column to be the
square root of the total. Since the total is 81, the number in each row and column
could be either +9 or -9 . Both answers are mathematically correct, but -9
doesn't make sense in the real world. So we know that +9 is the real answer.
Answer:
8!
Step-by-step explanation:
I'm sure you're still really smart, you just don't understand it :)
Those two bars mean the absolute value of whatever's inside of them. Absolute value is always positive, so if you had 34 inside of the bars, it would still be positive 34.
Now that we know what those bars mean, the expression is really this:
1 + 7
I'm sure you can solve that :)
The picture in the attached figure
A) -2
There is a green point where y = -2 ...so -2 is in the range of the function.
B) 1
There is a blue point where y = 1 ...so 1 is in the range of the function.
C) 2
There is a blue point where y = 2 ...so 2 is in the range of the function.
D) 5
There is not a point where y = 5 ...so 5 is not in the range of the function.
<span>
therefore
the answer is the option</span>
d.5
