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2 years ago

7×0.4= show work please

Mathematics

2 answers:

Anna35 [415]2 years ago

8 0

Answer:

2.8

Step-by-step explanation:

This is the same as:

$0.4+0.4+0.4+0.4+0.4+0.4+0.4$

If we were to change the question to:

$4+4+4+4+4+4+4=28$

That would be 10x this question's answer, Therefore you divide 28 by 10 to give you 2.8

svetoff [14.1K]2 years ago

6 0

Answer:

2.8

Step-by-step explanation:

.4 × 7 =2.8

.4+.4+.4+.4+.4+.4+.4

Hope this helps!!:)

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$\bf \cfrac{x^3y}{xy^5}\cdot \cfrac{x^2y^9}{x^8}\implies \cfrac{x^3x^2y^1y^9}{x^1x^8y^5}
\\ \quad \\
\textit{now, using exponent rules, same base, different exponent}
\\ \quad \\
\cfrac{x^{3+2}y^{1+9}}{x^{1+8}y^5}\implies \cfrac{x^5y^{10}}{x^9y^5}\\
----------------------------\\$ $\bf \textit{now, keep in mind that}
\\ \quad \\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad

\cfrac{1}{a^{ n}}\implies a^{-{ n}}
\\ \quad \\
% negative exponential denominator
a^{{ n}} \implies \cfrac{1}{a^{- n}}
\qquad \qquad 

\cfrac{1}{a^{- n}}\implies \cfrac{1}{\frac{1}{a^{ n}}}\implies a^{{ n}}
\\ \quad \\
thus\\
----------------------------\\
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\\ \quad \\
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8 0

3 years ago

7×0.4= show work please​

7×0.4= show work please