Answer:
63g extra
Step-by-step explanation:
420 x 0.15 =63 g
Answer:
144500
Step-by-step explanation:
(1.7 x 10^4) x (8.5 x 10^-2)
= (1.7 x 10000) x (8.5 x 0.01)
=( 17/10 x 10000/1) x (17/2 x 1/100)
=17000/1 x 17/200
=289000/2
=1445000
Answer:
Side = 
Step-by-step explanation:
Given that,
Area of a square room is 125 square feet
We need to find the length of one side of the room.
The area of a square shaped room is given by :

Where, x is side of the square room

So, the side of the room is
.
Answer:
Step-by-step explanation:
1) If you really meant X^2+12=40, then this simplifies to x^2 = 28, and therefore x = ±√28, or x = ±2√7.
2) If you meant X^2+12x=40:
a) Take half of the coefficient of x: that would be (1/2)(12), or 6.
b) Square this result, obtaining: 6² = 36
c) Add this 36 to x^2 + 12x + 40, and then subtract it: We get:
x² + 12x + 36 - 36 = 40, or x² + 12x + 36 = 76
We have to add 36, as indicated above, to "complete the square."