Question

7.8 + 50% of 64.4 = 7² - x²

• A. 6
• B. 2
• C. 1
• D. 3

Answer 1

Answer:

D. 3

7.8 + 50% of 64.4 = 7² - x² 7.8 + 1/2 × 64.4 = 7² - x² 7.8 + 32.2 = 49 - x² 40 = 49 - x² X² = 9 X = 3