If we let p and t be the masses of the paper and textbook, respectively, the equations that would best represent the given in this item are:
(1) 20p + 9t = 44.4
(2) (20 + 5)p + (9 + 1)t = 51
The values of p and t from the equation are 0.6 and 3.6, respectively. Thus, each paperback weighs 0.6 pounds and each textbook weighs 3.6 pounds.
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Answer:
x=4
Step-by-step explanation:
2x-3=9-x
1. add 3 to -3 and 9, which will cancel out -3 and leave you with 2x=12-x
2. add x to 2x and -x which will cancel out -x and leave you with 3x (there will always be a 1 in front of x if it has no variable in front of it x=1) which will leave you with 3x=12
3. divide 12 by 3 and you get 4..so x=4
Answer:
Simplify the expression.
Exact Form:
1/6561
Decimal Form:
0.00015241
…
Step-by-step explanation:
1/6561
Answer:
10 hours
Step-by-step explanation:
speed = distance/time
s = d/t
d = st
d = 75 km/h * 8 h = 600 km
t = d/s
t = 600 km/(60 km/h) = 10 h
Answer: 10 hours