PLEASE HELP FAST!

Mathematics

2 answers:

MissTica4 years ago

5 0

Answer:

B. y^2 - 3y

Step-by-step explanation:

y (y - 3)

yxy - yx3

y^2 - 3y

svetlana [45]4 years ago

4 0

Answer:

Step-by-step explanation:

y × y = $y^{2}$

y × -3 = -3y

$y^{2} -3y$

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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.

5 0

4 years ago

Read 2 more answers

g100num [7]

Answer:

B & D

Step-by-step explanation:

B & D

4 0

3 years ago

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For a circle with a radius of 15 cm, what is the length of an arc intercepted by an angle measuring 120°?