If y = 2x + 1 and x = 4, then y =

9

Step-by-step explanation:

First, plug-in 4 for x to get the equation y = 2(4) + 1

Then using PEMDAS we multiply 2 and 4 to get 8 and then add the one to make y = 9

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