2 years ago

Lisa solved 3x2 + 1 = 28 as shown.

Mathematics

1 answer:

Alekssandra [29.7K]2 years ago

4 0

x squared = 9 NOT x

x = square roots of 9 which is +3 or -3.

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Evaluate <br> e^-2to one decimal place.

aleksklad [387]

$\bf ~~~~~~~~~~~~\textit{negative exponents}\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad 
a^n\implies \cfrac{1}{a^{-n}}\\\\
-------------------------------\\\\
e^{-2}\implies \cfrac{1}{e^2}$

plug that in your calculator, yes, your calculator has an [ e ], button for the Euler's constant.

4 0

2 years ago

-7•(-9) <br><br> need help on this one with full work including

Veseljchak [2.6K]

Answer:

-7×-9

=63

Step-by-step explanation:

If u multiple - with -, I'll get + sign

6 0

3 years ago

Read 2 more answers