Answer:
Option 3 is correct as Leon multiplied 8 by 2 when he should have raised 8 to a power of 2.
Step-by-step explanation:
Given : Leon evaluated the expression
for a=8
(-4(8) - 6) + 82 , (-32-6) + 82 , (-38) + 82 , (-38) + 16 –19 + 16 –3
Leon's work is not so proper , Option 3 is correct as Leon multiplied 8 by 2 when he should have raised 8 to a power of 2.
Correct steps are :
Step 1 :
Step 2 : Put a=8 in the equation we get,
Therefore, correct answer is 26.
Answer:

Step-by-step explanation:
Given


Required
Determine the equation
First, we need to determine the slope (m):




Next, we determine the line equation using:

Where







The first vector's speed is 12.57 meters for one second
The second vector's speed is 5.21 meters for one second
The total distance is 12.57+5.21 = 17.78 meters over two seconds
Hence the speed is 17.78 / 2 = 8.89m/s
Answer:
250
Step-by-step explanation:
60% is 3/5. Meaning, for every 5 shots taken, the archer only makes 3.
So, they would need to make 250 shots before they get 100.
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The total tickets to be purchased to guarantee the win = 504 tickets
Step-by-step explanation:
Step 1 :
Number of entries in the trifecta race = 9
The win is to select the first finisher, second finisher and third finisher in their proper order.
We need to find the number of tickets to be purchased to guarantee the win
Step 2 :
Number of ways to select the first finisher = 9
Number of ways to select the second finisher = 8 [the first is selected and fixed. So the number of available finishes is reduced by 1]
Number of ways to select the third finisher = 7
Hence the total tickets to be purchased to guarantee the win = 9 × 8 × 7 = 504
Step 3 :
Answer :
The total tickets to be purchased to guarantee the win = 504 tickets