$123.53 because divide 132.44 by 16 and subtract .31 is the tax. Subtract that number from 131.44 is the cost of the desk before tax
<span>-2.9x + 5.4y = 140.94
answer is </span><span>y-intercept is 26.1
cause when </span><span>y-intercept x = 0
</span>-2.9(0)+ 5.4y = 140.94
<span>5.4 y = 140.94
y = 140.94 / 5.4
y = 26.1
</span>
To get the z-value of the scores of the four students, we are going to use the formula for standard score or z-score. It is score minus the mean score, then divided by standard deviation.
z= Score (X)-Mean / SD
To find the z-value of each score, we have to use a Z table. Using the z-score, we are to look first at the y-axis of the table which will highlight the first two digits of the z-score. Then, the x-axis for the second decimal place of the z-score.
You can use this as reference for the z-table: http://www.stat.ufl.edu/~athienit/Tables/Ztable.pdf
Mean= 500SD= 100Scores= 560, 450, 640, 530
For the student who scored 560,z= X-Mean / SDz= 560-500 / 100z= 60 / 100z= 0.6
The score is 0.6 standard deviation above the mean. The z-value is 0.7257 or 72.57%.
For the student who scored 450,z= X-Mean / SDz= 450-500 / 100z= -50 / 100z= -0.5
The score is -0.5 standard deviation above the mean. The z-value is 0.3085 or 30.85%.
For the student who scored 640,z= X-Mean / SDz= 640-500 / 100z= 140 / 100z= 1.4
The score is 1.4 standard deviation above the mean. The z-value is 0.9192 or 91.92%.
For the student who scored 530,z= X-Mean / SDz= 530-500 / 100z= 30 / 100z= 0.3
The score is 0.3 standard deviation above the mean. The z-value is 0.6179 or 61.79%.
Answer:y = 4x - 5
Step-by-step explanation:
point slope form is in the form of y = mx + b. m is the slope so we plug thatin and have the equation y = 4x + b. since we also have a point on the line we can plug those into the equation too. -1 = 4 * 1 + b.
now we simplify that through algebra.
-1 = 4 + b
b= -5
sp we get b and we can say the equation is y = 4x -5
Answer:
the Answer on The Image
Step-by-step explanation:
Thanks
