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.
Answer:
In a parallelogram, consecutive angles are supplementary. Thus,
B + C = 180^{\circ}
(2x+15)+x=180
3x+15=180
3x=165
x=55
Step-by-step explanation:
A.37
B.19.25
C.10.375
D.41
Answer:
its c
Step-by-step explanation:
its c
solve the equation above
Answer:
its -11
Step-by-step explanation:
(-11 + 12) = 1
1^2=1
so x equals -11
i hope i helped