We have the following equation:
x2 + 4x = - (y2 - 20)
Let's review step by step:
step 1:
x2 + 4x = -y2 + 20
Answer: OK
step 2:
x2 + 4x + 4 = -y2 + 20 - 4
Answer: Wrong
The correct step is:
x2 + 4x - 4 = -y2 + 20 - 4
Or equivalently:
x2 + 4x + 4 = -y2 + 20 + 4
Answer:
he did make an error in his work in step 2
It would be 1,4 if you turn it into a decimal ejfnf
$7.44
Hope I helped!!
giving me brainliest is much appreciated.. =)
Based on the information given the percent of the total cost of the bike has Wu saved is 30%.
Using this formula
Total cost percentage=Amount saved/Cost×100
Where:
Amount saved=$75
Cost =$250
Let plug in the formula
Total cost percentage=$75/$250×100
Total cost percentage=30%
Inconclusion the percent of the total cost of the bike has Wu saved is 30%.
Learn more here:
brainly.com/question/17157877
Answer:
900
Step-by-step explanation:
With a $6000 yearly premium and a $5000 deductible the break-even point would be 300 surgeries per year from a sample of 1000 insured people. Over 3 years that would equate to 900 surgeries.
$6000 x 1000 = $6000000
requiring surgery : $25000 - $5000 = $20000
Therefore $600000/$20000 = 300 claims per year
And 3 years x 300 = 900 claims over 3 years.
