Plz timed test asap will mark brainlest

the answer to your question is: 20 units

step-by-step explanation:

data

ab = 3x - 1

bc = x + 3

ac = 4x

perimeter = 42

process

42 = 3x -1 + x + 3 + 4x

42 = 8x + 2

42 - 2 = 8x

40 = 8x

x = 40/8

x = 5

then

ac = 4x = 4(5) = 20 units

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

$18 was the price of the t-shirt

step-by-step explanation: