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Schach [20]
3 years ago
9

Jenny wants to buy an MP3 player that costs $30.98. How much change does she receive if she gives the cashier $40? PLEASE SHOW A

LL WORK!!
Mathematics
2 answers:
QveST [7]3 years ago
5 0

40.00

-30.98

————-

9.02

You have to do some trades or borrowing. But think about it this way:

You need 2 cents to make it to $31. Then it’s $9 to get to 40.

Degger [83]3 years ago
5 0
$40.00-$30.98= $9.02
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Mazyrski [523]

Answer:

In traffic, she drove for 3 hours

and After the traffic cleared she drove for 2 hours.

Explanation:

Given that the road trip was 136 miles;

d=136

The first part of the trip there was lots of traffic, she only averaged 16 mph;

v_1=16

The second part of the trip there was no traffic so she could drive 44 mph;

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She traveled for a total of 5 hours;

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let x represent the time in traffic when she traveled at 16 mph

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the time the traffic is clear would be;

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Recall that distance equals speed multiply by time;

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solving for x;

\begin{gathered} 136=16x+220-44x \\ 44x-16x=220-136 \\ 28x=84 \\ x=\frac{84}{28} \\ x=3 \end{gathered}

So;

\begin{gathered} t_1=3\text{ hours} \\ t_2=5-x=5-3=2 \\ t_2=2\text{ hours} \end{gathered}

Therefore, In traffic, she drove for 3 hours

and After the traffic cleared she drove for 2 hours.

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