Answer:
D
Step-by-step explanation:
Put n as 48 and solve.
-11 + (48 - 1)(-3)
- 11 + (47)(-3) = -152
Answer:
C.
Step-by-step explanation:
First, we calculate the amount if ammonia in 22 gallons of 16% ammonia solution.
16% * 22 gal = 3.52 gal
The amount of ammonia remains the same after the water evaporates, but the total amount of solution is reduced by the amount of water that evaporates.
amount of ammonia: 3.52 gal
amount of water that remains: 22 - n
desired concentration, 24% = 24/100
Equation:
(3.52)/(22 - n) = 24/100
Answer: C.
change the mixed numbers to improper factions
2 3/4 = (4*2+3)/4 = 11/4
4 1/4 = (4*4+1) /4 = 17/4
110 divided by 11/4
copy dot flip
110 * 4/11 = 40 words per minute
40 word per minute * 17/4 minutes
170 words
Between 21 and 22, and between 63 and 64. Hope this helps.
