3 years ago

In 56 years Keven will be 9 times as old as he is right now

Mathematics

1 answer:

Aleks04 [339]3 years ago

6 0

Answer:

Keven is 6 and a half or seven right now.

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Simplify the expression square root of -25/(5-2i) + (1-3i)

Georgia [21]

Answer:

I guess $\frac{25}{6} -5i$

Step-by-step explanation:

$\frac{-25}{(5-2i)+(1-3i)}$ 1. rewrite the expression(it helps me tbh)

$\frac{-25}{5 - 2i+1-3i}$ 2. Distribute the positive symbol to (1-3i)

$\frac{25}{6-5i}$ 3. treat i as a variable while you combine like terms

$\frac{25}{6} -5i$ 4. divide 25 by 6-5i but leave 25/6 as a fraction since it can't be divisible.

6 0

3 years ago

(3a) (a^-3) please help I'm very confused if possible please show your work! <:D

kupik [55]

$\bf ~\hspace{7em}\textit{negative exponents} \\\\ a^{-n} \implies \cfrac{1}{a^n} ~\hspace{4.5em} a^n\implies \cfrac{1}{a^{-n}} ~\hspace{4.5em} \cfrac{a^n}{a^m}\implies a^na^{-m}\implies a^{n-m} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ (3a)(a^{-3})\implies 3a\cdot \cfrac{1}{a^3}\implies \cfrac{3a}{a^3}\implies \cfrac{3~~\begin{matrix} a \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}{aa~~\begin{matrix} a \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}\implies \cfrac{3}{a^2}$