C = 6.5h
for 2 hrs...so we sub in 2 for h...for francesca
c = 6.5(2)
c = 13
for 6 hrs...so we sub in 6 for h...for phil
c = 6.5(6)
c = 39
so Phil pays (39 - 13) = 26 more <=
(-2,2)(5,1)
slope(m) = (1 - 2) / (5 - (-2) = -1 / 7
y = mx + b
slope(m) = -1/7
use either of ur points....(5,1)....x = 5 and y = 1
now sub and find b, the y int
1 = -1/7(5) + b
1 = -5/7 + b
1 + 5/7 = b
7/7 + 5/7 = b
12/7 = b
equation is : y = -1/7x + 12/7....but we need it in standard form...
y = -1/7x + 12/7
1/7x + y = 12/7
x + 7y = 12 <== standard form
Answer:
She will get <u>80mg</u> of dextromethorphan and <u>800mg</u> of guaifenesin. And the bottle last for <u>6 days</u> approximately.
Step-by-step explanation:
Given that the Robitussin DM contains dextromethorphan 10mg/5mL and gualfenesin 100mg/5mL. And we are also given that Mrs Smith took four doses and each dose is 2 teaspoons=2X5=10mL.
So, four doses=4X10=40mL.
So, dextromethorphan in 4 doses is = 
And Guaifenesin in 4 doses is =
Dosage of medicine daily she has to take=40mL and the bottle contains 237 mL. Hence the number of days bottle last =
≈6 days approximately.
The answer is 54 because you add them