What is this??? Please help me

(3A - Z) / 4

Step-by-step explanation:

A = (1/3) (4c+z)

3A = 4c + z

3A - z = 4c

c = (3A - z) / 4

you save $70

discount would be 35% off

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33