Answer:
k = 28/5
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
Explanation:
<u>Step 1: Define</u>
10/7 = 8/k
<u>Step 2: Solve for </u><em><u>k</u></em>
- Cross-multiply: 10k = 56
- Isolate <em>k</em>: k = 56/10
- Simplify: k = 28/5
<u>Step 3: Check</u>
<em>Plug in k to verify it's a solution.</em>
- Substitute: 10/7 = 8/28/5
- KCF: 10/7 = 40/8
- Simplify: 10/7 = 10/7
Here we see that 10/7 does indeed equal 10/7.
∴ k = 28/5 is a solution of the equation.
b- cannot tell which change produced the results
Answer:
Number of students ; 60
Explanation:
Using the formula for p +- z * Sqrt ( pq/n )
Let us first calculate the Margin of Error
= 0.816 –0.7 = 0.116
•z* = 1.96
P = (0.584 + 0.116 ) = 0.7
Q = 1- p = 1 – 0.7 = 0.3
Now inserting the values in the formula; we get
0.116 = 1.96 x sqrt { ( 0.7 x 0.3) / n }
Solving the above equation
N = 60 (rounded off to nearest number)
Hence the number of students that were selected by the environmental teacher in the sample is 60
Answer:
Explanation:
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Answer:
Any clue what the answer is?
Explanation:
I need help super super bad bc I have 5 minutes left and am on the verge of failing