WHAT IS THE ANSWER TO THIS IF ANYONE KNOW?

c

Step-by-step explanation:

all you have to do is multiply each individual subject in "a" with "-2" and add the "7"times the individual subject in "b" (be careful you have to add with corresponding or respective subjects from each set)

example... -2*4+7*7=41

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

i believe the answer is the polygon, heptagon.