3 years ago

What is the value of 7 in number 3,407,215

Mathematics

2 answers:

Anastaziya [24]3 years ago

5 0

Answer:

7=7000

Step-by-step explanation:

Zepler [3.9K]3 years ago

4 0

To determine what the digit 7 means in 3,407,215, if we put 3,407,215 into the place value chart, we can see that the 7 appears in the units column of the thousands period.

So the digit 7 in this number means 7 thousands.

Image below.

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Y is directly proportional to x,and y=216 when x=2. Find y when x=7.

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$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
y=216\\
x=2
\end{cases}\implies 216=k2\implies \cfrac{216}{2}=k
\\\\\\
108=k\qquad therefore\qquad \boxed{y=108x}
\\\\\\
\textit{when x = 7, what is \underline{y}?}\qquad y=108(7)$