If and , what is ?
Answer and explanation
Correct answer: B.
- Step 1: Solve the system: and (substituting into both equations confirms it). Step 2. . **Answer: . Why not the others:** gives only ; gives only ; is off by one after solving.
Practise more Applied arithmetic and algebra.
Free questions with an explanation for every one, and full timed Egzamin Maturalny (Matura Poland) mock tests.
More Applied arithmetic and algebra questions
- The price of a backpack is 200. It is first increased by 25% and then the new price is decreased by 50%. What is the final price?
- 45% of a number is 36. What is the number?
- A bonus of 98 is shared in the ratio . How much does the larger share receive?
- The mean of 5 numbers is 69. Of them, 4 are 63, 57, 62, 76. What is the remaining number?
- One pipe fills a barrel in 4 hours and another pipe fills it in 12 hours. How many hours does it take to fill the barrel when both pipes are…
- What is the difference between the compound interest and the simple interest on 4000 for 3 years at 5% per year (compounded annually)?