Last option - angle BAF and FAD
Answer:
x² + 8x + 7
General Formulas and Concepts:
<u>Algebra I</u>
- Terms/Coefficients/Degrees
- Expand by FOIL (First Outside Inside Last)
Step-by-step explanation:
<u>Step 1: Define</u>
(x + 7)(x + 1)
<u>Step 2: Expand</u>
- Expand [FOIL]: x² + x + 7x + 7
- Combine like terms: x² + 8x + 7
The mass of substance left after 7 days is 13.09 g
The mass of substance left, N is given by
N = N₀exp(-λt) where λ = decay constant and N₀ = initial mass of substance present = 24 g and t = time
Also, λ = 0.693/t' where t' = half-life of iodine = 8 days
So, λ = 0.693/t'
λ = 0.693/8
λ = 0.086625/day
Since the mass of substance left is N = N₀exp(-λt) and we require the mass of substance after t = 7 days,
N = N₀exp(-λt)
N = 24 gexp(-0.086625/day × 7 days)
N = 24 gexp(-0.606375)
N = 24 g × 0.5453
N = 13.09 g
So, the mass of substance left after 7 days is 13.09 g
Learn more about radioactive decay here:
brainly.com/question/23705307
1. 1.5x < = 51
x < = 51/1.5
x < = 34
2. 2.50x < = 20
x < = 20/2.5
x < = 8
3. x/5 < = 4
x < = 4 * 5
x < = 20...the maximum would be $ 20
4. not sure how to make this into an inequality...it looks like an equation.
13/(3 1/4) = x
13 / (13/4) = x
13 * 4/13 = x
4 = x...she can make 4 batches
5. cant see all of it....cant see how many pictures she wants framed
6. 5L < 55
L < 55/5
L < 11...
7. 4h > = 100
h > = 100/4
h > = 25 hrs babysitting
8. x + 125 + 20 < = 180
x + 145 < = 180
x < = 180 - 145
x < = 35 minutes listening to music
Distributive property then subtract...think of it as going the opposite of pemdas when solving for a variable
3r+24=72
3r=48
r=16
