maths inequalities...
Find the range of values of k for which the expression x^2 -4x + k will be positive for all real values of x. Hence state the range of values of x satisfying the inequality x^2 -4x + 7 > 0. For the first part, this is what i did: (-4)^2 - 4(k) > 0 k<4 but how do i do ...
weird maths sum!!
The questions is simply: Find the range of values of x for which x(2-x)<-15 This is what i did: x(2-x)+15<0 2x - x^2 + 15 < 0 -x^2 + 2x + 15 < 0 (x+3)(-x+15) < 0 -3<x<5 but when i check by subbing the number, say, 4 into x, the answer is always greater tha...
algebra story problems
You have a metal plate that you have drilled a hole into. The entire area enclosed by the metal plate is given by 5x^2 = 12x + 10 and the area of the hole is given by x^2+2. Write an expression for the area in factored form of the plate that is left after the hole is drilled.
ALGEBRA 1
I need to simplify a rational expression. 2xsquared+11x-6/x+6
Science
I agree that the answer is A
Anatomy and Physiology
What process describes how a signal travels from one end of a neuron to the other end? A. Membrane excitability B. Neurotransmitter release
Anatomy and Physiology
I think B (both) but I'm not sure if it's a trick question, that why i asked
Anatomy and Physiology
A 63-year-old man has become progressively hard of hearing. He's a retired airplane mechanic. He also notices a lot of wax in his ears. What kind of hearing loss is this man likely to have? A. Conductive B. Conductive AND sensorineural
Anatomy And Physiology
A 63 year old man has become progressively hard of hearing. He's a retired airplane mechanic. He also notices a lot of wax in his ears. What kind of hearing loss is this man likely to have? A. conductive B. conductive AND sensorinueral
Anatomy And Physiology
Chromosomes can be seen only during: A. active transport B. cell division c. meiosis D. neutralization
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