Answer:
There were 26 students in his class and the teacher had 83 ml of the solution.
Step-by-step explanation:
Mr. Kohl has a "x" amount of solution, if he divides it by the number of students "n" he'll give each student 3 milliliters and have a left over of 5 milliliters. If the amount of solution Mr. Kohl had was "x + 21" then he'd be able to give each student 4 milliliters of the solution. From these informations we have:
x = 3*n + 5
(x + 21)/n = 4
x + 21 = 4*n
x = 4*n - 21
Now that we have two equations and two variables we can solve the system of equations, as seen bellow:
3*n + 5 = 4*n - 21
3*n - 4*n = -21 - 5
-n = -26
n = 26
x = 4*26 - 21 = 83 ml
There were 26 students in his class and the teacher had 83 ml of the solution.
(1.2×10^-3)/(4×10^6)
1.2/4=0.3
(10^-3)/(10^6)=10^-9
0.3×10^-9= 3×10^-10
Answer:
a
Step-by-step explanation:
Answer:
Step-by-step explanation:
1. 2/5
2. 9/20
3. 0.43
4. 40.2%
5. 42%
6. 0.403
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I truely hope this is right & i hope this helps you ! <3
Answer:
35
Step-by-step explanation:
use distributive property
5a + 5b
5×1 + 5×6
5 + 30
35
