-4. x=2
For x = -4 2x2 + x = 2 (-4)2 + (-4) = 32 - 4 = 28
4
y=8 y = 2x y = 2(4) <-- substitute 4 for x y = 8 <-- this is your answer
The value of x is 11/2
-4. x=2
For x = -4 2x2 + x = 2 (-4)2 + (-4) = 32 - 4 = 28
5(-2)+(-3)(-4) =-(10)+12 =2
If you mean: x^2+15-3x then its value is 19 when x equals 4
4
y=8 y = 2x y = 2(4) <-- substitute 4 for x y = 8 <-- this is your answer
5X - 2Y X = 9 Y = 4 5(9) - 2(4) 45 - 8 37 is the value
-3x - 2 = -6 -3x = -6 + 2 -3x = -4 -x = -4/3 x = 4/3 The absolute value is therefore 4/3.
x = 8y = -42x - y = 2(8) - (-4) = 16 + 4 = 20
Exactly (2y + 4) .
The value of x is 11/2
The value of x works out as -3