Y=mx+b
so is 2
the last number of the equation
To find area you do length x width. To find perimeter you do length + width.
3+5=8 24÷8=3
3×3=9 muffins 5×3=15-pizza
I hope this helped!!!:)
she should add 7 liters of 10% acid solution
Explanation
Step 1
set the equation:
a) let X represents the amount os solution that is 4% acid
let Y represents the amount os solution that is 10% acid
so
I)

if he has 14 liters of 4% acid solution


Step 2
solve the equation :

therefore,
she should add 7 liters of 10% acid solution
I hope this helps you