HEL GET 25PTS!! 4. A student banks $200 when she starts Secondary College in Year 7. In Year 8 she banks $250, $300 in Year 9, and so on. She is at the school for 6 years.

(a) Determine a formula relating the amount deposited during a year (200, 250,…) to how many years she has have been saving (1, 2, …).

Because the deposits are increasing, the formula for the bank balance is more complex and is not a ‘linear relationship’. Answer the following using a table:

(b) What is the total amount she has banked by the time she finishes after 6 years?

(c) If she continued banking in this manner after she leaves school, how many years

(from the start) will it take for her balance to exceed $15,000?

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".

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation: