A metal bar changes in length by 1 meter with a 150 degree Celsius change in temperature. It's coefficient of linear expansion is 25% 10% per degree Celsius,
What is the metal bar's original length?

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

(3x-8) or (3x+8)

step-by-step explanation:

47 - 90 = 43

43 - 180 = x

x = 137