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3 years ago

William wants to buy a new skateboard that costs $55, but

Mathematics

1 answer:

zepelin [54]3 years ago

7 0

Answer:

No, he will not be able to buy it.

Step-by-step explanation:

He can't buy the skateboard because even with the 20% discount the skateboard costs 44 dollars.

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Solve:

svp [43]

568/800 is equal to 71%

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2 years ago

On Monday, 279 students went on a trip

belka [17]

45 students in each bus

7 0

3 years ago

Which is greater 2.48 or 2.83

Artist 52 [7]

Answer:

2.83 is larger by 0.35

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Each student in her 8th grade math class presented her with a cookie. One-third of the students each gave her an oatmeal cookie,

dezoksy [38]

Answer:

36. There are 36 students in the class.

Step-by-step explanation:

4/12 oatmeal

2/12 cinnamon

3/12 chocolate

9 peanut

The fractions added together = 9/12

This means the 9 students = 3/12 of the class

3 x 4 = 12

9 x 4 = 36

3 0

3 years ago

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

7 0

3 years ago