Plzzz ! marie mixes 16 liters of 18% acid solution with a 27% acid solution, which results in 21% acid solution. let x represent the number of liters of 27% solution used and let y represent the number of liters of mixture. which system of equations can be used to find the number of liters of 27% acid solution in the mixture? 1. y = x + 16; 0.27y = 0.21x + 2.88 2. y = x + 16; 0.21y = 0.27x + 2.88 3.y = x + 16; 0.21y = 0.27x + 4.32 4. y = x + 16; 0.27y + 2.88x = 0.21

2. y = x + 16; 0.21y = 0.27x + 2.88

Step-by-step explanation:

You have two conditions:

For the first condition,

16 + x = y     Transpose

(1)    y = x + 16

For the second condition

  V₁c₁    +  V₂c₂  =  V₃c₃

16×0.18 + 0.27x = 0.21y

   2.88 + 0.27x = 0.21y               Transpose

(2)           0.21y = 0.27x + 2.88

The system of equations is y = x + 16; 0.21y = 0.27x + 2.88

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

5 pm

step-by-step explanation: