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What is 12x-7 equals 4x plus 9?
12X - 7 = 4X + 9 subtract 4X from both sides 8X - 7 = 9 add 7 to both sides 8X = 16 divide both sides by 8 X = 2 check 12(2) - 7 = 4(2) + 9 24 - 7 = 8 + 9 17 = 17 checks
What is the square root of 4x-8x plus 9?
4x-8x = -4x √-4x stands. However, x could not possibly be a positive number, because: (Negative) X (Positive) = (Negative) The square root of a negative number is undefined-so... (√-4x) + 9 Is your answer.
What is 8x subtract 3 equals 6?
8x-3=6 8x=9 x=9/8=1 1/8=1.125
What are the extreme values of 2x2-8x plus 9?
Given: f(x) = 2x2 - 8x + 9 This function describes a parabola, which only has one extreme value. To find that value, you can take the derivative of the function, and use that to find the point at which it has a slope of zero: f'(x) = 4x - 8 if f'(x) = 0, then: 0 = 4x - 8 ∴4x = 8 ∴ x = 2 Now we work out the corresponding value for f(2): f(2) = 2(2)2 - 8(2) + 9 = 8 - 16 + 9 = 1 So the extreme value for this function is 1, which occurs at the point (2, 1)
8x plus 23 plus 4x - 7x equals 68?
The answer is nine. Seriously. Here is my work if you don't believe me: 68=8x+23+4x-7x 68=8x-7x+23+4x 68=x+23+4x 68=x+4x+23 68=5x+23 68-23=5x 45=5x x=45/5 x=9
