2 years ago

What is the value of x

Mathematics

2 answers:

dezoksy [38]2 years ago

6 0

There is no question?????!!!!!!!!!

max2010maxim [7]2 years ago

4 0

We need the equation

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Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2 h, and Car B traveled the dista

lidiya [134]

Recall your d = rt, distance = rate * time.

notice, the distance are the same, say it was "d" miles.

and if car A is travelling at a speed of say "r" mph, then B is going at "r+15" mph.

$\bf \begin{array}{lccclll}
&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\
&------&------&------\\
\textit{Car A}&d&r&2\\
\textit{Car B}&d&r+15&1.5
\end{array}
\\\\\\
\begin{cases}
\boxed{d}=2r\\
d=1.5(r+15)\\
----------\\
\boxed{2r}=1.5(r+15)
\end{cases}
\\\\\\
2r=1.5r+22.5\implies 0.5r=22.5\implies r=\cfrac{22.5}{0.5}\implies \boxed{r=\stackrel{mph}{45}}$

how far is B going? well, r + 15.

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3 years ago

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-3+9-27+81-243+729. Using the sigma notation to write the given sum

IgorC [24]

Answer:

546

Step-by-step explanation:

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2 years ago

Write an equivalent expression.

djyliett [7]