His answer is not reasonable because the decimal is misplaced. The actually answer is 21.5564, all he did was move the decimal place over.
11 is your answer I think
Note x^2 =y and rewrite this quartile equation in y and will get a quadratic what you need to solve it
f(x) = x^4 +21x^2 -100 note x^2 =y
f(y) = y^2 +21y -100
y^2 +21y -100 = 0
D = 21^2 -4(-100) = 441 +400 = 841
y_1,2 = (-21 +/- sqrt841 )/2 = (-21 +/- 29)/2 = -50/2 = - 25 and 8/2 = 4
so y_1 = - 25 and y_2 = 4
x_1,2 = sqrt(y_1) = sqrt(-25) = +/- 5i
x_3,4 = sqrt4 = +/- 2
hope this will help you
I believe it's
- 1 -
Hope I helped! ( Smiles )
Answer:
Mr. Duke received <u>1.65%</u> percent of the agency's fee.
Step-by-step explanation:
Given:
Mr. Duke worked for a real-estate Agency.
He sold a house for $225,000. The agency’s fee for the sale was 3% of the sale price.
Mr. Duke received $3712.50 of the agency’s fee as his commission.
Now, to find the percent of the agency's fee Mr.Duke receive.
<em>Mr. Duke sold house = $225,000.</em>
<em>Mr.Duke received = $3712.50.</em>
So, to get the percent of agency's fee Mr. Duke receive:
Therefore, Mr. Duke received 1.65% percent of the agency's fee.