i need help with these two question... please , its really confusing.

1.identity tan^2x(cos^2x+1)+cos^2x=sec^2x

A.state any non permissible values

B.the possible identity numerically.

C.possible identity graphically 

d. prove the identity 

2. the possible identity cos 2x = 2 sinxcosx

A.state any non-permissible values

B.possible identity numerically

C.possible identity graphically

d prove identity 

A stimulus causes a change in permeability of neural membranes . w process of transmitting an impulse . If the stimulus reaches neuron , an action potential is generated . Select occur once the threshold potential is reached . neural membranes , which begins the the stimulus reaches the threshold potential of a is generated Select the numbers of the statements below that 1. Sodium ions flow into the neuron . 2. Sodium ions flow out of the neuron . 3. The membrane potential becomes positive. 4. The membrane potential becomes negative. 5. Voltage -gated potassium channels open. 6. Voltage - gated potassium channels close . 7. Potassium ions flow into the neuron . 8. Potassium ions flow out of the neuron .                                           Place the numbers in order from the first event to the last event :

During a soccer match, Tony, at point A, passes the ball to Eoin, at point C, to avoid the defender at point B. Eoin then kicks the ball towards the 7.32 m wide net in an attempt to score. The path of the ball is modeled by the absolute value function . Suppose a Cartesian plane is superimposed over the opponent’s half of the pitch such that the opposite corners of the field of play have the coordinates (0, 60) and (90, 0), as shown. 

a.At what point does Eoin receive the ball?

b. If player B does not intercept the ball, verify whether or not the ball makes it into the goal.

c.If Tony passes the ball from point (5,36), state the domain and range of the absolute value function, within the context of this situation.

The phenotype of

a heterozygous sheep and a homozygous recessive sheep

can someone help me with this question is super confusing.

cube with side length x has been modified by adjusting its side length x has been modified by adjusting its length, width and height. A student determined a function of the form v(x)=(x+a)(x+b)(x+c) can be used to represent the volume of the new box for different values of x, and then she graphed the function.

a.based on the graph ,predict how the side lengths of the original cube changed.(hint:what do the zeros of the function represent?

b.determine a polynomial function of the form v(x)=(x+a)(x+b)(x+c) that's matches the function in the graph .

c.which parts of the graph are realistic?(hint:all sides must be positive.using two negative side lengths to give positive volume is not realistic.)

can somebody help me I'm really confused with this question

question 2.

a.show that p(x)/x-a=Q(x)+R/x-a can be rearranged to p(x)=Q(x)(x-a)+R

b.evaluate p(a),showing it simplifies to R.

c.how does the answer in part b. relate to the remainder theorem?

d.using p(x)=Q(x)(x-a)+a to explain the factor theorem.(hint:what is the value of R if there is no remainder? substituted this value for R into Q(x)(x-a)+R to show x-ais a factor of p(x).

Which of the following statements correctly describes the role of androgens in the male reproductive system?

question 1.

- For function f

-the graph of y=f(x) extends down into quadrant lll and down into quadrant IV

-the zeros of f are -2,3 and 5 

-the degree of f<5

1.what degrees is possible for f?

2.what are the maximum and minimum multiplicities possible for a zero of f?

3.two possible equations?

4.two possible graphs of y=f(x)

------------------------------------------------------------------------------------------------

question 2.

a.show that p(x)/x-a=Q(x)+R/x-a can be rearranged to p(x)=Q(x)(x-a)+R

b.evaluate p(a),showing it simplifies to R.

c.how does the answer in part b. relate to the remainder theorem?

d.using p(x)=Q(x)(x-a)+a to explain the factor theorem.(hint:what is the value of R if there is no remainder? substituted this value for R into Q(x)(x-a)+R to show x-ais a factor of p(x).

------------------------------------------------------------------------------

quastion 3

a cube with side length x has been modified by adjusting its side length x has been modified by adjusting its length, width and height. A student determined a function of the form v(x)=(x+a)(x+b)(x+c) can be used to represent the volume of the new box for different values of x, and then she graphed the function.

a.based on the graph ,predict how the side lengths of the original cube changed.(hint:what do the zeros of the function represent?

b.determine a polynomial function of the form v(x)=(x+a)(x+b)(x+c) that's matches the function in the graph .

c.which parts of the graph are realistic?(hint:all sides must be positive.using two negative side lengths to give positive volume is not realistic.)

A crate of bananas with a mass of 25.0 kg is dragged across a level floor by an applied force of +150 N [E] against a frictional force of 50.0 N [W]. What is the observed acceleration of the crate?

which of the following answers correctly identifies the number showing the axon terminal in the diagram and gives the axon terminal function