Answer:
12.
a.
i. (x-9)(x-3)
ii. x = 9 or 3
b. (y+10(y-10)
Step-by-step explanation:
12.
a.
i.
Two numbers that multiply to make 27 and add to make -12 are: -9 and -3.
Put into brackets so you have: (x-9)(x-3)
ii.
Consider each bracket as its own equation.
x-9=0
x=9
x-3=0
x=3
b.
Difference of two squares
Answer:
3 gallons of paint
Step-by-step explanation:
If 3/4 of a gallon covers 2/5 of a wall, this means that a half of 3/4 gallons can cover 1/5 of a wall.
By knowing this, you can just make up your own expression
(the trick is to find a way to break it down to one, so you can multiply and manipulate it to save yourself some brain cells)
1/5+1/5+1/5+1/5+1/5= whole wall if 3/4/2=3/8 = amount of paint to cover 1/5 wall, then (3/8)⋅5=3/8+3/8+3/8+3/8+3/8=15/8≈1.875
since we're talking about real life it would be 2 gallons of paint instead of 1.875 gallons to paint the whole wall
Answer:
Five billion, six-hundred and eight million, nine-hundred and twelve thousand, and thirteen.
Hope this helps!
Answer: not rounded: 39.37694907
Rounded to the nearest tenth: 39.4
Step-by-step explanation:
I suggest using a calculator lol! Hope this helped!
Answer:
4
Step-by-step explanation:
h=8
p=4√3
b=?
By using Pythagoras theorem,
b=√h²-p²
=√8²-(4√3)²
=√64-48
=√16
=4