Answer and explanation

Correct answer: D. 13

  1. Step 1: Substitute: . Answer: 13. Why not the others: 10: adds instead of multiplying. 16: puts the brackets in the wrong place. 7: subtracts the constant.

Practise more Arithmetic, algebra, geometry and statistics.

Free questions with an explanation for every one, and full timed Egzamin Osmoklasisty (Eighth-Grade Exam, Poland) mock tests.

What is the value of… | Egzamin Osmoklasisty (Eighth-Grade Exam, Poland)