Suppose two brothers named mario and luigi liketo compete by playing a certain video game. mario thinks heis better at this game than luigi and sets out to prove it bykeeping track of who wins. after playing the game 30 times, mario won 18 of them (or 60%). mario then declares thatthis proves he is obviously the better player. luigi, who justfinished chapter 1 in his statistics class, realizes that perhapshe and his brother are evenly matched and just by chancemario won 60% of the last 30 games. luigi is going to testthis by running a test of significance. a. describe what the parameter is that luigi should be testing. b. state the appropriate null and alternative hypotheses inthe context of this study. (hint: luigi likes two-sided testsbecause he knows that will make it harder to get strongevidence that his brother is better.)c. using an appropriate applet, fi nd the p-value usinga theory-based test (one-proportion z-test; normalapproximation).d. summarize your conclusion from your p-value. e. the p-value you found in part (c) should have beengreater than 0.05. suppose the two brothers continue tocompete and mario continues to win 60% of the games. how many games will they have to play until he gets ap-value less than 0.05 after retesting?

black lol

step-by-step explanation:

h

i can tell you jamal now has 3 cookies xd

tommy has 2.

this made me lol.

a.   we have two

lines:   y = 4-x   and  

y = 8-x^-1

given two simultaneous equations that are both to be

true, then the solution is the points where the lines cross. the intersection is

where the two equations are equal. therefore the solution that works for both

equations is when

4-x = 8-x^-1

this is where the two lines will cross and that is the

common point that satisfies both equations.

b.   4-x = 8-x^-1

  x           4-x       8-x^-1

-3           7        

8.33

-2           6         8.5

-1           5         9

  0           4        

-

  1           3        

7

  2           2        

7.5

  3           1         7.67

the table shows that none of the x values from -3 to 3 is

the solution because in no case does

4-x = 8-x^-1

to find the solution we need to rearrange the equation to

find for x:

4-x = 8-x^-1

multiply both sides with x:

4x-x^2 = 8x-1

x^2+4x-1=0

x= -4.236, 0.236

therefore there are two points that satisfies the

equation.

find y:  

x=-4.236

y = 4-x   = 4 – (-4.236)

= 8.236

y = 8-x^-1 =   .236)^-1

= 8.236

x=0.236

  y = 4-x   = 4 – (0.236) = 3.764

y = 8-x^-1 =   8-(0.236)^-1

= 3.764

thus the two lines cross at 2 points:

(-4.236, 8.236) & (0.236, 3.764)

c.   to solve

graphically the equation 4-x = 8-x^-1

we would graph both lines: y = 4-x   and   y

= 8-x^-1

the point on the graph where the lines cross is the

solution to the system of equations.

just graph the points on part b on a cartesian coordinate

system and extend the two lines.   the

solution is, as stated, the point where the two lines cross on the graph.

step-by-step explanation:

mark brainliest!

answer: the answer is b. i think hope i got it correct

step-by-step explanation:

the answer is d

step-by-step explanation:

you can also use mathway to get you answer + steps