Hi I have the answer. The answer would be D. 8. If we take are trying to find half of something. Multiply every answer choice by 2. When you find the answer the answer would be the one you found with the right choice. In this case A and B ar incorrect because multiplying 2 digits would not be the answer. C is not the answer because 2 x 9 = 18. In conclusion 8 x 2 = 16. Please give brainliest I am trying to get a new rank before my birthday. Good luck !
If it takes 8 hours to drain 3/5.
How long would it take to drain 5/5
Cross multiplication
8 hours = 3/5
x hours = 5/5
(5/5 × 8) ÷ 3/5
13.3 hours.
Hope this helped
Answer:
18i, -7-i, -6+18i
Step-by-step explanation:
1. √-324
first take out the negative as √-1=i
√-324= i√324
324 =2*162
324=2*2*81
324=2*2*9*9
i√324=i√2*2*9*9= i* 2*9= 18i
3.
-4+7i-3-8i combine like terms
-4-3 -8i+7i = -7-i
5.
(1+5i)(4-2i) distribute
1*4 -1*2i +5i*4 -5i*(-2i) multiply
4 -2i +20i +10i² but i²= -1 so
4 -2i +20i -10 combine like terms
-6 +18i
