The relationship between the number of dollars per month that a company spends on advertising and its monthly sales can be modeled the equation y = 0.5x + 10, 000 , where advertising and is the monthly sales According to the model what will be the company's monthly sales no money on advertising? amount

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

if you was gonna solve for a, a is a   < -12

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.