Answer:
Option B is correct
Step-by-step explanation:
Doug is x years old, so Byron is x+3 years old. The product of their ages would then be x times x+3:
x(x+3) = 40
x2 + 3x = 40
x2 + 3x + 40 = 0
Now, factor the equation:
(x+8)(x-5) = 0
Then, solve for both values of x:
x+8 = 0
x = -8
x-5 = 0
x = 5
As no one can have a negative age, we simply disregard x=-8 as invalid. Therefore, Doug is 5 years old & Byron must be 5+3 - or 8 years old.
<h3>Hope it is helpful...</h3>
200x 9, nine times two hundred,
Answer:
8
Step-by-step explanation:
256 = 64 • 64
64 • 64 = 8 • 8 • 8 • 8
It's the 4th root of 256
The number comes out to 8
Hope this helps! And one more thing...
Next time, pay attention!
Answer:
Step-by-step explanation:
height=√(13²-9²)=√(13-9)(13+9)=√4(22)=2√11
area=1/2×9×2√11=9√11≈29.85 ft≈29.9 ft