Barbara invests £14000. in the first year she earns 5.9% interest. in the second year, she earned 3.2% interest. what was the fotal increase over the 2 years

The total increase over the 2 years=£1,300.43

Step-by-step explanation:

a). Express the total amount after the first year as shown;

A=P(1+r)^n

A=total amount earned in a year

P=initial amount invested

r=annual interest rate

n=number of years

In our case;

P=£14000

r=5.9%=5.9/100=0.059

n=1

A=14,000(1+0.059)^1

A=14,000(1.059)

A=£14,826

The total amount in the second year

A=14,826(1+0.032)^1

A=£15,300.432

Increase=Amount after 2 years-Initial amount

Increase=(15,300.432-14,000)

Increase=1,300.43

The total increase over the 2 years=£1,300.43

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".