Factors are related to prime numbers because, a prime number is a number with only two factors: one and itself.
(factors are numbers we can multiply to get another number)
20 fish, 8 multiplied my 2.5 because 25 is 2.5 times greater than 10.
Multiplying 4.2 with the value was given in the bracket, then multiply -2 with the values given in the bracket,we get [8.4x - 2.1y - 8.2x + 0.6y]
then we simply the x and y terms, and the answer is [0.2x - 1.5y]
hope this helped!!
Step-by-step explanation:
If you recall SOH CAH TOA, you know that
cosine ∠T = adjacent / hypotenuse
You can write this with adjacent = OT and hypotenuse = BT.
And you can also write this with adjacent = AT and hypotenuse = CT.
So cosine ∠T = OT/BT = AT/CT.
But this is not exactly what has to be proven. If we multiply left and right by BT/AT we do get what we want:

OT/AT = BT/CT
which IS what had to be proven.