Question

The weight of Jacobs backpack is made of the weight of the contents of the backpack as well as the weight of backpack itself. Seventy percent of the total weight is textbooks. His notebooks weight a total of 4 pounds, and the backpack itself weighs 2 pounds. If the backpack contains only textbooks and notebooks, which equation can be used to determine t. The weight of the textbooks?

Answer 1

Answer:

Equation: t = 0.7W or t = (b+n) - W

Weight of t: 14 lbs

Step-by-step explanation:

To determine the weight of the textbooks we need to determine the weight of the entire backpack itself. We can create the following formula to figure this out.

$W = t+b+n$

Where

1. W is the weight of the entire backpack
2. t is the weight of the textbooks
3. b is the weight of the backpacks
4. n is the weight of the notebooks

Since the textbooks are 70% of the weight of the entire backpack, we can use the following expression to represent the textbooks.

$t = 0.7w$

Now we can use the given values and plug them into the formula we created, and begin solving for the weight of the total weight.

$W = 0.7W+2+6$

$W = 0.7W +6$  ..... subtract 0.7W from both sides

$0.3W = 6$  .... divide both sides by 0.3

$W = 20$

Now that we know that the total weight of the backpack is 20 lbs we can calculate the weight of the textbooks.

$t = 0.7W$

$t = 0.7*20$

$t = 14$

So the textbooks are 14 lbs.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

Answer 2

It looks like there are choices. If I don't get this the way your choices are written please leave a note under my answer.

total weight = w

w = n + bp + t

t = 70% * w <<<< One possible answer

t = (70/100)*W = 0.7*W Either one of these could be an answer.

n = 4 pounds

bp = 2 pounds

w = 4 + 2 + t Substitute for t

W = 6 + (70%W)

W = 6 + (70/100) * W

W = 6 + 0.7*W Subtract 0.7W from both sides.

W - 0.7W = 6

0.3W = 6 Divide by 0.3

W = 6/0.3

W = 20

t = (70/100*20 = 14 <<<< Could be an answer.

Please put the possible choices up soon. The mods can be very touchy about uncertain answers. They are correct to delete such questions.