Help with #11 and pls show me work so I know how u did it

Mathematics

1 answer:

Zanzabum3 years ago

3 0

From experience, you do not always increse the ingredients proportinally or else you will get some srprise

but this rpblem assumes that

basically
since 2 and 1/3 increased to 7
we have to increase flour also
by how much?

2 and 1/3 times how many=7
7/3 times what=7
multpily both sides by 3/7 to clea fraction
what=21/7
what=3 times

so flour has to increase by 3 time aslso
2=orignal flour
2*3=6
flowur is now 6

B
another way is
(2 and 1/3)/7=2/x
solve for x

B is anser

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$\bf h=-9.8t^2+45t+1.2\implies 64.5=-9.8t^2+45t+1.2
\\\\\\
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-------------------------------$

$\bf \qquad \qquad \qquad \textit{discriminant of a quadratic}
\\\\\\
0=\stackrel{\stackrel{a}{\downarrow }}{-9.8}t^2\stackrel{\stackrel{b}{\downarrow }}{+45}t\stackrel{\stackrel{c}{\downarrow }}{-63.3}
~~~~~~
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\begin{cases}
0&\textit{one solution}\\
positive&\textit{two solutions}\\
negative&\textit{no solution}
\end{cases}
\\\\\\
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D. 62 because if we separate the shape into two then one will be 5*4 and the other will be 7*6. Adding them up will equal the whole shape.