Answer:
0.4kg, 1.4kg and 1.8kg
Step-by-step explanation:
Given parameters:
Mass of alloy = 3.6kg
Ratio of elements in the alloy = 2:7:9
Unknown:
Mass of each element in the alloy = ?
Solution:
To find the mass of each element in the alloy, first find the sum of the ratio;
2+7+9 = 18
Mass of nickel = 
x 3.6 = 0.4kg
Mass of zinc = 
x 3.6 = 1.4kg
Mass of copper = 
x 3.6 = 1.8kg
The mass of each metal is 0.4kg, 1.4kg and 1.8kg
The answer would be 168 minutes.
I believe you would create and equation to find x and y.
Answer:
x = - 6
Step-by-step explanation:
Note the equal sign, what you do to one side, you do to the other. Isolate the variable (x). Divide -15 from both sides
(-15x)/-15 = (90)/-15
x = 90/(-15)
Divide.
x = 90/-15
x = -6
*Remember that when you divide a negative number and a positive number, the result will be a negative answer.
-6 is your answer
~
