Answer:
Okay so for this you will use the FOIL (first, outer, inner, last) method.
Step-by-step explanation:
So, first you take the x from (x-3) and multiply it by the x in (x-4).
So, now you have x^2
Then you do the outer which would be x multiplied by 4.
Now you have -4x.
Then you multiply the inner which is -3 times x.
Which is -3x.
Now its the last which is -3 times -4 which equals 12.
Now you put them in order:
x^2 - 4x - 3x + 12
Lastly, you combine like terms:
x^2 -1 + 12
There are exactly 49.7097 miles in 80km. If you were to round that, it would be about 50 miles.
Answer:
Step-by-step explanation:
Find the area of each shape, then multiply by 20, then round to nearest hundred.
Half circle:
=πr²/2
=50π
=157.08
Large square:
=L•w
=20(22)
=440
Small square:
=L(w)
=12(3)
=36
Triangle:
=b(h)/2
=8(3)/2
=12
Btu req:
=(157.08+440+36+12)(20)
=(645.08)(20)
=12901.6
=12900 BTU
