Answer:
30
Step-by-step explanation:
Sum of ages= 40
Let the sons age be x
Fathers age = 3 times x or ,3x
So 3x+x=40
4x= 40
x= 40/4
= 10
Therefore the fathers age = 3x
= 3*10
= 30
So hmmm x²+6x+8=0
alrite.. let's do some grouping now
( x² + 6x + [?]²) + 8 = 0
notice above, we have a missing fellow in order to get a perfect square trinomial... hmm who would that be?
let's take a peek at the middle guy of the trinomial.. 6x.. hmmm let's factor it, 2*3*x, wait a minute! 2 * 3 * x... we already have x² on the left-side, since the middle term is just 2 * the square root of the other two terms, that means that the guy on the right, our missing guy must be "3"
alrite, let's add 3² then, however, bear in mind that, all we're doing is borrowing from our very good friend Mr Zero, 0
so if we add 3², we also have to subtract 3², let's do so
(x² + 6x +3² - 3²) + 8 = 0
(x² + 6x +3²) + 8 - 3² = 0
(x+3)²=3² - 8
(x+3)² = 1
Answer:
You inject 60.9628 milliliters of dosage
Step-by-step explanation:
1 pound = 0.453592kg,
Patient's weight in pounds = 168
Patient's weight in kg = 
Now we are given that The dosage is 0.4 mg per kilogram of bod
So, dosage = 
1 microgram = 0.001 mg
Concentration of drug = 
Now we are supposed to find How many milliliters (= cc) are you to inject?
So,milliliters of dosage required to inject = 
Hence you inject 60.9628 milliliters of dosage
Answer:
Step-by-step explanation:
h2 + 52 = 102
<span> h2 = 10<span>2 </span>− 52 = 100 − 25 = 75 = 52×3</span>
<span> <span> h = 5</span></span>3 ≈ 8.7
Area A = ½×10×h ≈ ½×10×8.7 ≈ 43 cm<span>2</span>
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<span>Hope this helps</span>
