2 answers:
Answer: The required simplified form is 
Step-by-step explanation: We are given to simplify the following expression :

To simplify the above expression, we must multiply 20 with each term within the bracket.
The multiplication is as follows :

Thus, the required simplified form is 
20(-1.5r + 0.75)
= 20*-1.5r + 20*0.75
= -30r + 15 answer
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Answer:
square root 2, pi, 1/3 and 2/7
Answer:
0.89
Step-by-step explanation:
Is this 2 questions or is it just one whole question?
Answer:
x = ±5
Step-by-step explanation:
x² - 25 = 0
x² = 25
√x² = √25
x = ±5
Check:
5² - 25 = 0
-5² - 25 = 0
25 - 25 = 0
The equivalent expression -
4n + 19