Use PEMDAS to solve this problem.
Answer:
every answer is the same but still the answer is a,b,c,d
Answer:
5/(1/2)(3.9)(4)² - 2/(2/5)(3.9)(4)² - 1/(3/5)(3.9)(4)² - 1/2(3.9)(4)²
Convert mixed numbers to improper fractions,
11/2(3.9)(4)² - 12/45(3.9)(4)² - 8/5(3.9)(4)² - 1/2(3.9)(4)²
Remove bracket,
11/2 × 3.9 × 4² - 12/45 × 3.9 × 4² - 8/5 × 3.9 × 4² - 1/2 × 3.9 × 4²
Factor out common term 3.9 × 4²,
3.9 × 4² (11/2 - 12/5 - 8/5 - 1/2)
Times,
3.9 × 16
Answer,
62.4
Answer:
12.5, not 100% sure though.
The length is 25.
Do 7 × 2 = 14, then 64 - 14 = 50. Then do 50 ÷ 2 to give you 25.