How do you know if the line is parallel 

Which of the following descriptions of photoreceptors in the eye is NOT correct?  

Which of the following correctly describes the olfactory sensory pathway? Select one:

if the range of y= 1/f(x) is { y is less than or equal to -1/4 or y is greater tahn 0, yER}, then the range of y= f(x) may be

a. {y is less than or equal to -4,. yER}

b. {y is greater than or equal to -4, yER}

c. {y is greater than or equal to -1/4, yER}

d. {y -4 is less than or equal to y less than or equal to -1/4, yER}

A partial solution to the equation [ax+b]=cx+d

line 1 [ax+b]= cx+d

line 2 -ax-b= cx+d

line 3 (-a-c)x= d+b

line 4 x= d+b/-a-c for  x less than or equal to -b/a

the first error recorded is a. 1

b. 2

c. 3

d. 4

A partial solution to the equation [ax+b]=cx+d

line 1 [ax+b]= cx+d

line 2 -ax-b= cx+d

line 3 (-a-c)x= d+b

line 4 x= d+b/-a-c for  x less than or equal to -b/a

if the graph of y= f(x), xER is the same as y= [f(x)], xER, then

a. f(x) may be of the form ax+b, a cannot equal to zero or of the form ax²+bx+c, a cannot equal to 0

b. f(x) may be of the form ax+b, a cannot equal to 0, but cannot be of the form ax²+ bx+c, a cannot euqal to zero

c. f(x) may be of the form ax²+bx+c, a cannot equal to 0, but cannot be of the form ax+b, a cannot equal to 0

d. f(x) cannot be of the form ax+b+c, a cannot equal to 0 or ax²+bx+c, a cannot equal to 0

[] mean absolute value

if (p) + p cannot equal to 0, then

a. p less than 0

b. p is less than or equal to 0

c. p is greater than 0

d. p is greater than or equal to 0

a reference gives the molar enthalpy of combustion for methane as -803 kj/mol. what is the minimum mass of methane must be burned to warm 4.00 L of water from 22.4 C to 87.6 C, assuming no heat loss?

if f(x) = x²+4x+4, then the }domain of y= 1/ f(x) is

a. {x cannot equal -2, 2, xER}

b. {x cannot equal to - 2, xER}

c. {x cannot equal to 2, xER}

d. { xER}