27x4=108 is the best form and answer
1. 13
2. 9 or 38 not really sure
3.1595
4.. 810
Answer:
C. 4 + x = 3x - 2, 3
Step-by-step explanation:
4 + x = 3x - 2
Step 1: Subtract 3x from both sides; 4 - 2x = -2
Step 2: Then subtract 4 from both sides, -2x = -6
Step 3: Last divide -2 on both sides; -2x/-2 = -6/2
Solution: x= 3
Answer:
Approximately 143 mL of 1:4 solution and 457 mL of water
Step-by-step explanation:
A 1:4 solution has a concentration of 1/(1+4) = 1/5 or 20%.
Similarly, a 1:20 solution has a concentration of 1/(1+20) = 1/21 or 4.76%.
If x is the mL of 20% solution and y is the mL of water, then:
x + y = 600
1/5 x = 1/21 (600)
Solve:
x = 5/21 (600)
x ≈ 143
y ≈ 457
You need approximately 143 mL of 1:4 solution and 457 mL of water.
