Step-by-step explanation:
I guess you want to solve for n.
in that case
-2 = 0.8n
n = -2/0.8 = -2 / 8/10 = -2 × 10/8 = -5/2 = -2.5
B the correct answer Is b
Answer:
C. 153.84 mL
Step-by-step explanation:
Let's say x is the volume of 75% solution and y is the volume of 10% solution.
Sum of the volumes:
x + y = 500
Sum of the alcohol amounts:
0.75x + 0.10y = 0.30(500)
0.75x + 0.10y = 150
Solve the system of equations using either substitution or elimination. I'll use substitution.
y = 500 - x
0.75x + 0.10 (500 - x) = 150
0.75x + 50 - 0.10x = 150
0.65x = 100
x = 153.84
You need 153.84 mL of 75% solution.
Expanded for shows how do u get the number and when u multiply it's like EX: 3 times .01 which is .03 so that's how is show u in expanded form and word from is showing how u say is and the place it's at EX: twenty-one and four tenths shows it's 21.4.
Answer:
12 square units
Step-by-step explanation:
(Base x height)/2
(6*4)/2=12