K5000 was invested at the rate of 10%, what is simple interest for 1year 9months.

K875

Step-by-step explanation:

Principal = 5000

Rate, r = 10% = 10/100 = 0.1

Time = 1 year 9 months

Converting 9 months to year = 9 /12 = 3/4

Hence, time = 1 + 3/4 = 1 3/4 years = 1.75 years

Recall :

Simple interest = principal * rate * time

Simple interest = 5000 * 0.1 * 1.75 = K875

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".