The 4th one the 2nd the 1st then the 3rd
The sum of 1.9 and n.
Add n to 1.9.
-x^2y^2 + x^4 + 4y^2 - 4x^2
Separate into two parts to make simplification easier. Find the GCF of the values in each part.
-x^2 (y^2 - x^2) + 4 (y^2 - x^2)
Combine the factors and because the two in parenthesis are equal, eliminate one.
(-x^2 + 4) (y^2 - x^2)
Hope this helps!
Answer:
A
Step-by-step explanation:
Given a quadratic equation in standard form : ax² + bx + c = 0
Then the discriminant Δ = b² - 4ac informs us about the nature of the roots.
• If b² - 4ac > 0 then 2 real, distinct roots
• If b² - 4ac = 0 then 2 real , equal roots
• If b² - 4ac < 0 then 2 non real roots
x² + 6x + 14 = 0 ← is in standard form
with a = 1, b = 6, c = 14, then
b² - 4ac = 6² - (4 × 1 × 14) = 36 - 56 = - 20
Since b² - 4ac < 0 then 2 non real roots → A
We first need the weight of the person in kg.
Applying
1 lb = 0.454 kg
180 * 0.454
= 81.72 kg
The daily dosage of drug is then:
25 * 81.72
= 2043 mg
Dividing that into two doses per day:
2043 / 2
= 1,021.5 mg per dose