Question

Jillian simplified the expression 7 + 3 . (10 -6) ^2 in the following way:

7 + 3 . (10 - 6) ^2
7+ 3 . (4)^2
7+3 . 16
10 . 16
160

Part: A Explain, using the complete sentences, what Jillian’s error was


Part B: show how the expression should have bee simplified using a similar format.

Please help me how should I explain it

Answer 1

Part A:

Jillian's error was that they added the 7 and the 3 to get 10 and then multiplied by 16. Jillian should have multiplied the 3 and the 16 first and then added 7. This is because multiplication comes before addition in PEMDAS.

Part B:

7+3×(10-6)^2

7+3×(4)^2

7+3×16

7+48

55

Explanation:

PEMDAS

Answer 2

Part A: Jillian added 7+3 first rather than multiplying 3*16 b/c multiplication comes before addition

Part B:

7 + 3 * (10 - 6) ^2

7+ 3 * (4)^2

7+3 * 16

7 + 48

55

Explanation: