It’s wrong.
The surface area means the area of the outside of the cube.
The area of a square is just width x height. And we are told one of the sides is 5.
A square has all equal sides. So what’s 5x5? then times that by the number of squares
I’ll put the answer in the comments
Probability ( 1 blue marble and 3 green marbles) = ( Blue, green, green, green) + ( green, blue, green, green) + ( green, green, blue, green) + ( green, green, green, blue) = { (8/13) × (5/12) × (4/11) × (3/10) } + { (5/13) × (8/12) × (4/11) × (3/10) } + { (5/13) × (4/12) × (8/11) × (3/10) } + { (5/13) × (4/12) × (3/11) × (8/10) } = (4/143) + (4/143) + (4/143)+ (4/143) = 16/143
If the answer does not correspond to yours, do tell me. I'll try to correct mine
Answer:
What system of equations?????????
Step-by-step explanation:
Answer:
The scalar used does not exist in the real number system.
Step-by-step explanation:
The ratio 16:14 is not equivalent to the ratio 64:60 because the scalar used does not exist in the real number system.
Note, that the ratio 64:60 can be scaled down by 4 to be the ratio 16:15, which is not the ratio 16:14.
In order to scale 64:60 to 16:14 or vise versa, you'd have to use a number that simply does not exist in the real number system.
Cheers.
Answer:
a : b : c = 12 : 10 : 15
Step-by-step explanation:
Given that: b = 
of c
i.e b = 
............... 1
2c = 5b
So that;
c = 
.................... 2
Also,
4a = 3c
a = 
................ 3
⇒ a = 
× ()
a = 
................. 4
15b = 8a
b = 
................. 5
Comparing the derived equations:
From equations 2 and 3,
a:c = : = 4:5
From equations 1 and 2,
b:c = : = 2:3
But a common value of b = 15, gives;
a : c = 12 : 15 and b : c = 10 : 15
Thus, a : b : c = 12 : 10 : 15
