#1= -4 and 2
#2= -9 and 2
#3= -10 and 4 I think you meant -14 as a sum
The answer is D.) b-g/w + 1 = t
-10,-3,-1 is your answer. So the first one
Answer:
As per the given statement:
The distance from jack eyes to the top of the tower = 50.64 m
Also, jack and john eyes are 1.5 m from the ground.
Labelled diagram as shown in the attachment
Let BC = x m be the distance of the jack from the base of the tower and
AG = y m be the distance above 1.5 m from the the ground.
Using tangent ratio:
In triangle AGE;
Here, AG = y m and EG = 20+x m
then;
or we can write this as;
........[1]
Similarly, in AGF;
then;
or
......[2]
Substitute equation [2] into the equation [1], to solve for x;
or
Using distributive property:
we have;
Subtract 0.84 x from both sides we get;
Divide both sides by 0.892 we get;
Therefore, 18.8 meter johns from the base of the tower.
Answer: B 68
Step-by-step explanation:
x is a raw score to be standardized;
μ is the mean of the population;
σ is the standard deviation of the population.
Therefore the mean is zero. Seventy is -1z, or -1 standard deviation.
Step 2: 34.13% of the cases fall between -1 standard deviation and the mean. Thus there is a 34.13% chance that the score will fall between 70 and 75. This, of course, assumes a normal curve.
Step 3: An 80 is +1z or +1 standard deviation assuming a normal curve.
Step 4: Thirty four percent of the cases fall between +1 standard deviation and the mean. Thus there is a 34.13% chance that the score will fall between 75 and 80. This, of course, assumes a normal curve.
Step 5: Score between +1z and -1z, or +1 and -1 standard deviation account for 68.26% of the cases.