Please help with these four questions and thanks

Question 19: 4(x+5)+3 = 4·x+4·5+3 (second option).

Question 20: (117.50-83.50)+6(22.50+3) = 34+6(25.50) --> (last option).

Third question:

375=x-28

x= 375+28

x= 403

Fourth question:

0.57, 0.66, 0.75, 0.84,...

0.66-0.57= 0.09 and 0.75-0.66= 0.09 and 0.84-0.75= 0.09

So, the next three terms are: 0.93, 1.02, 1.11

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of

step-by-step explanation:

is their an equation anywhere i can take a   look at it and see if i am right.