Answer:
x = a/(a² + b²) or x = -1/a
Step-by-step explanation:
a(a²+ b²)x² + b²x - a =0
Use the quadratic equation formula:

1. Evaluate the discriminant D
D = b² - 4ac = b⁴ - 4a(a² + b²)(-a) = b⁴ + 4a⁴ + 4a²b² = (b² + 2a²)²
2. Solve for x


Answer:
5 years
Step-by-step explanation:
Step one:
Given Information
Principal= $34,000
rate = 4.8%
SImple interest = $8,160
Required
The time T of the investment
Step two:
the expression for simple interest is

substitute

cross multiply we have

divide both sides by 163200

Answer:
<u><em>90 males.</em></u>
Step-by-step explanation:
To find the answer we will <u><em>divide 45% by 100</em></u>, and we get <u><em>0.45</em></u>. Now <u><em>multiply 0.45 by 200</em></u> and you get <u><em>90</em></u>. Therefore, <u><em>90 males is the answer. </em></u>
Answer:
He made a math error
Step-by-step explanation:
6 ounces of pistachios cost $7.50
take 7.50 / 6=1.25 per ounce ( not .80 per ounce)
Then 1.26 * 16 = 20.00 for 16 ounces
$819.20 is the answer considering each time the units increase by fours, it adds $204.80