Answer:
Lai yee : 45
Khadijah : 15
Step-by-step explanation:
Here is the Explanation
Answer:
Step-by-step explanation:
hello :
2x² + 25 = -x² + 10x
2x²+x²-10x+25 =0
3x²-10x+25=0
∆ = b²- 4ac a=3 and b=-10 and c=25
∆ = (-10)²- 4(3)(25)=100 -300 = -200< 0
two complex solutions
Answer:
The ratio is 4:12:15.
Step-by-step explanation:
we need to make the first ratio (Sylvia's to John's) comparable to second one (John's to Peter's). Since John is in both ratios, we use his number to make it the same. 3 and 4 can both be multiplied into 12. So, multiply the first ratio by 4 and the second by 3.
![(1:3) * 4 = 4:12\\(4:5) * 3 = 12:15](https://tex.z-dn.net/?f=%281%3A3%29%20%2A%204%20%3D%204%3A12%5C%5C%284%3A5%29%20%2A%203%20%3D%2012%3A15)
Put it together, and you get 4:12:15.
Hope it helps :P
Answer:
The approximate area is 35 square centimeters
Step-by-step explanation:
we know that
The cross section passing through the diagonal of opposite faces of the cube is a rectangle
so
the approximate area is equal to
![A=bh](https://tex.z-dn.net/?f=A%3Dbh)
where
b is the diagonal of a face
h is the length side of the cube
we have
![b=7\ cm\\h=5\ cm](https://tex.z-dn.net/?f=b%3D7%5C%20cm%5C%5Ch%3D5%5C%20cm)
substitute
![A=7(5)=35\ cm^2](https://tex.z-dn.net/?f=A%3D7%285%29%3D35%5C%20cm%5E2)
150,165,180,198,204,216,230,255
Quartile 1: (165+180)÷2
=345÷2
=172.5
Quartile 3: (216+230)÷2
=446÷2
=223
Quartile range:223-172.5=50.5 or D. Hope it help!