Pre calc first pic is the question. second pic is the possible answers

4

-12

8

Step-by-step explanation:

1                -1

-3    - 3*      3     =

2                -2    

multiplication by a scalar just multiplies each item in the matrix

1                -3

-3    -         9     =

2                -6

1  --3  

-3-9        =

2--6                

1+3

-3-9

2+6

4

-12

8

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

60%