Kayla had 101785.44 in a savings account with simple intrest. she had opened the account with 80020 exactly 2 years ago. what was the interest rate? pls

13.6 %

Step-by-step explanation:

The simple interest formula is

A = P(1 + rt)

Data:

A = $101 785.44

P = $  80 020

t = 2 yr

Calculation:

101 785.44 = 80 020(1 + r×2)

Divide each side by 80 020

1.2720 = 1+ 2r

Subtract 1 from each side

0.2720 = 2r

Divide each side by 2

r = 0.136 = 13.6 % APR

The annual percentage rate is 13.6 %.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

no this is a nonlinear negative