A phone company charges for service according to the formula: C ( n ) = 30 + 0.02 n , where n is the number of minutes talked, and C is the monthly charge, in dollars. The slope in this equation is:

The vertical intercept in this equation is:

answer is 144

step-by-step explanation:

the answer is 489

step-by-step explanation:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: