The equation can be used to determine t, the weight of the textbooks is t = 0.7w
Given:
let
Total weight = w
Weight of notebook = n
Weight of backpack = b
Weight of textbook = t
w = n + b + t
where
n = 4 pounds
b = 2 pounds
t = 0.7w
So
w = 4 + 2 + 0.7w
w - 0.7w = 4 + 2
0.3w = 6
w = 6/0.3
w = 20
Recall,
t = 0.7w
= 0.7(20)
= 14 pounds
Therefore, the weight of the textbook is 14 pounds
Learn more about equation:
brainly.com/question/4916384
Check out the attached image below for the steps on how to do this derivation.
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Some notes:
- For line 2, I used the identity

- For line 7, I applied the reciprocal to both sides.
- For line 8, I used the identity

- For line 9, I used the identty
which is a rearrangement of 
- For lines 1 through 6, I'm isolating tan^2, so that I can later transform that into cot^2, which leads to csc^2. All of this is done through the identities mentioned above.
Answer:
5 gallons per 3 minutes
12 minutes to empty it all
it is active so it is holding 20 gallons
Step-by-step explanation:
self explanatory i think
Answer:
X=7, Y=5
Step-by-step explanation:
In the attached file