2 years ago

Suspensions require active mixing to stay suspended

Mathematics

1 answer:

Svetllana [295]2 years ago

3 0

Answer:

any other part of the question?

Step-by-step explanation:

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Pamela is 9 years younger than Jiri. The sum of their ages is 67. What is Jiri's age?

ipn [44]

Answer:

Jiri is 38 years old.

Step-by-step explanation:

First, 67 - 29 = 38 and 29 + 9 = 38.

Hope this helps!

4 0

3 years ago

Simplify the expression (10 + 3i)(10 - 3i).

WINSTONCH [101]

Answer:

109

Step-by-step explanation:

$\textbf{Assuming}~ i ~\textbf{as the imaginary unit, where}~ i = \sqrt{-1}~ \textbf{and}~ i^2 = -1\\\\\textbf{Given that,}\\\\~~~(10+3i)(10-3i)\\\\=10^2 -(3i)^2~~~~~~~~~~;\textbf{Difference of two squares} ~a^2 -b^2 = (a+b)(a-b)\\\\=100-9i^2\\\\=100-9(-1)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~;{i^2 = -1}\\\\=100+9\\\\=109$