U just divide 70 and 45 and u get your answer
Answer:
y = -18
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
<u>Algebra I</u>
- Solving systems of equations using substitution/elimination
Step-by-step explanation:
<u>Step 1: Define systems</u>
y = 5x - 3
3x - 2y = 27
<u>Step 2: Rewrite systems</u>
- Define: 3x - 2y = 27
- Add 2y on both sides: 3x = 2y + 27
- Divide 3 on both sides: x = 2/3y + 9
<u>Step 3: Redefine</u>
y = 5x - 3
x = 2/3y + 9
<u>Step 4: Solve for </u><em><u>y</u></em>
- Substitute in <em>x</em>: y = 5(2/3y + 9) - 3
- Distribute 5: y = 10/3y + 45 - 3
- Combine like terms: y = 10/3y + 42
- Subtract 10/3y on both sides: -7/3y = 42
- Divide -7/3 on both sides: y = -18
The line y = 12 is a horizontal line with a slope of 0.
Therefore a line parallel to line y = 12 will have a slope of 0.
A line perpendicular to line y = 12 is a vertical line, the slope of a vertical line is undefined.
Answer:
0.3707
Step-by-step explanation:
Mean length = 30.05 inches
Standard deviation = 0.3 inches
We are supposed to find the probability that the average length of a steel sheet from a sample of 9 units is more than 29.95 inches long
Formula : 
x= 29.95
Substitute the values :
Refer the z table for p value
p value = 0.3707
So, the probability that the average length of a steel sheet from a sample of 9 units is more than 29.95 inches long is 0.3707
