How do I find the weight of items in the weights given?

12) 141.75g

13) 150g

14) 12kg

Step-by-step explanation:

By using common sense.

None of the weights can be negative, so that rules out the first option for both questions 12/13.

12) For question 12 that leaves you with two answers. You have to decide between a book weighing 141.75g or 141.75kg.

Considering that books are fairly light, and 141.75kg is quite a hefty weight, I would chose 141.75g.

13) Same again for question 13. If you have a 150kg smart phone, I'd be very surprised that you could hold it.

14) Options 1/2 are very inappropriate for a weight of 24 bottles of water.

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation: