The National Statistics Reports described a study in which a sample of 360 one year old baby boys were weighed. Their mean weight was 25.4 pounds with a standard deviation of 5.3 pounds. A pediatrician claims that the mean weight of one year old boys is greater than 25 pounds. He performs a mu hypothesis test, using the Student t-distribution, and he finds a p-value of 0.024. The level of significance was set to be alpha = 0.05. What is the proper
decision?
(a) Reject H0.
(b) Do NOT reject H0.

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

7

step-by-step explanation:

the answer would be 7

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3