4x - 2y - z = - 5 ______×2x - 3y + 2z = 3 _______×13x + y - 2z = - 5 ______×1
8x - 4y - 2z = - 10x - 3y + 2z = 33x + y - 2z = - 5
8x - 4y - 2z = - 10(+) x - 3y + 2z = 3_____________9x - 7y = - 77y = 9x + 7y = 9/7x + 1
x - 3y + 2z = 3(+) 3x + y - 2z = - 5_____________4x - 2y = - 24x - 2(9/7x + 1) = - 24x - 18/7x - 2 = - 210/7x = 0x = 0
y = 9/7(0) + 1y = 1
0 - 3(1) + 2z = 32z = 6z = 3
Answer:
1.5 ml
Step-by-step explanation:
We have been given that the concentration on hand is 10 mg per ml.
We know that gr stands for grains.
We know that 1 gr equals 60 mg.
First of all, we will convert 1/4 gr to mg as:



1 ml equals 10 mg. We can set an a proportion as:




Therefore, 1.5 ml is needed for the dose.
Answer:
12.5
Step-by-step explanation:
.25 x 50= 12.5