60% are blue.
3/5 are blue.
2/5 are red.
There are 3 blue fish and 2 red fish.
Answer:
495 milliliters of the 95% mixture are needed.
Step-by-step explanation:
Given that I need a 90% alcohol solution, and on hand I have a 55 ml of a 45% alcohol mixture, and I also have 95% alcohol mixture, to determine how much of the 95% mixture will I need to add to obtain the desired solution, the following calculation must be performed:
55 x 0.45 + 45 x 0.95 = 67.5
25 x 0.45 + 75 x 0.95 = 82.5
15 x 0.45 + 85 x 0.95 = 87.5
10 x 0.45 + 90 x 0.95 = 90
10 = 55
90 = X
90 x 55/10 = X
4,950 / 10 = X
495 = X
Thus, 495 milliliters of the 95% mixture are needed.
Answer:
-2
Step-by-step explanation:
4+3u=-2
3u=-2-4
u=-6/3
u=-2
The projection of vector A <em>parallel</em> to vector B is 
and the projection of vector A <em>perpendicular</em> to vector B is 
.
In this question, we need to determine all projections of a vector with respect to another vector. In this case, the projection of vector A <em>parallel</em> to vector B is defined by this formula:
(1)
Where 
is the norm of vector B.
And the projection of vector A <em>perpendicular</em> to vector B is:
(2)
If we know that 
and 
, then the projections are now calculated:
The projection of vector A <em>parallel</em> to vector B is and the projection of vector A <em>perpendicular</em> to vector B is .
We kindly invite to check this question on projection of vectors: brainly.com/question/24160729
