Someone me i’m trying to get ahead for

why is -12.3,-9.7,-7.1,-4.5 an arithmetic sequence? ?

Explanation:

A sequence is arithmetic when its first differences are the same.

To calculate first difference, subtract a term from the term before of it.

(Aka tₙ - tₙ₋₁)

Do this a few times.

-9.7 - (-12.3) = 2.6

-7.1 - (-9.7) = 2.6

-4.5 - (-7.1) = 2.6

Since the first differences are the same, all 2.6, the sequence is arithmetic. The next term is calculated by adding 2.6.

312312

step-by-step explanation:

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: