I think this should help a bit
Answer:

Step-by-step explanation:
1.Convert all volumes to millilitres
(a) Chlorpheniramine
V = 100 mL
(b) Lidocaine

(c) Banana flavouring

2. Calculate the total volume
Chlorpheniramine = 100 mL
Lidocaine = 59
Banana flavouring = <u> 2.5 </u>
TOTAL = 162 mL
3. Calculate the number of doses

4. Calculate the number of days

Answer:
The 2 option :)
Step-by-step explanation:
Answer:
-1
Step-by-step explanation:
-2(-x+4) - 1
2x - 8 - 1
2(4) - 8 - 1
8 - 8 - 1
-1
Ok well, first of all, you must do 12 x 2 because if Mike has twice as many of red marbles, (12 red) then you must multiply that by 2. So 12 x 2 is 24! Then Mike has 3 times as many of yellow marbles, so you do 24 x 3, which is 72! So the answer is A, Sandy is correct. Hope this helps! :)