Select 2 strategies that we can use to add 438 + 362.

Mathematics

2 answers:

yarga [219]3 years ago

8 0

Answer:

Add 438 + 2 + 60 + 300

440 + 360

Step-by-step explanation:

The last one does not add up to 800

Good luck <3

Gnom [1K]3 years ago

4 0

Add 438 + 2 + 60 + 300

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In science class the girl to boy ratio is 6 to 2. If there are 30 girls how many boys are there?

schepotkina [342]

Answer:

10 boys

Step-by-step explanation:

6:2 simplfies to 3:1 30 / 3 = 10

30:10 simplfies down to 6:2

8 0

4 years ago

Read 2 more answers

The volume

Sedaia [141]

$\bf \begin{array}{cccccclllll}
\textit{something}&&\textit{varies directly to}&&\textit{something else}\\ \quad \\
\textit{something}&=&{{ \textit{some value}}}&\cdot &\textit{something else}\\ \quad \\
y&=&{{ k}}&\cdot&x
&& y={{ k }}x
\end{array}\\ \quad \\
$

and also

$\bf \begin{array}{llllll}
\textit{something}&&\textit{varies inversely to}&\textit{something else}\\ \quad \\
\textit{something}&=&\cfrac{{{\textit{some value}}}}{}&\cfrac{}{\textit{something else}}\\ \quad \\
y&=&\cfrac{{{\textit{k}}}}{}&\cfrac{}{x}
&&y=\cfrac{{{ k}}}{x}
\end{array}
$

now, we know that V varies directly to T and inversely to P simultaneously
thus $\bf V=T\cdot \cfrac{k}{P}$

so $\bf V=T\cdot \cfrac{k}{P}\qquad 
\begin{cases}
V=42\\
T=84\\
P=8
\end{cases}\implies 42=\cfrac{84k}{8}\implies 4=k
\\\\\\
V=\cfrac{4T}{P}\qquad now\quad 
\begin{cases}
V=74\\
P=10
\end{cases}\implies 74=\cfrac{4T}{10}\implies 185=T$