Given: mtrv = 60° mtrs = (4x)° prove: x = 30
what is the missing reason in step 3?
substitution property of equality
angle addition postulate
subtraction property of equality
addition property of equality

The Angle addition Postulate   :The postulate describes that putting two angles side by side with their vertices together creates a new angle whose measure equals the sum of the measures of the two original angles.Given the sum of a pair of angles and the algebraic expressions that represent them we can form and solve an equation.

It is given mTRV = 60° mTRS = (4x)° Prove: x = 30'

In statement 3 we have m<TRS+M<TRV=180(The angles add to given 180)

The missing reason in step 3 is angle addition postulate.

y=mx+b

step-by-step explanation:

m slope, b y-intercept

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