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Blababa [14]
3 years ago
6

Rachel and Marc drive to work.

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
6 0

Answer:

Step-by-step explanation:

Rachel

d = 90 miles.

d = 90 * 1.6 km = 144 km

t = 1.25 hours.

Average speed = d/ time

Average speed = 144/ 1.25 = 115.2

Marc

d = 244 km

t = 2hr 30 minutes

30 minutes = 1/2 hour = 0.5 hours

Average speed = 244 km / 2.5 hours

Average speed = 97.6

Difference

Difference = Rachel - Marc

Difference = 115.2 - 97.6

Difference = 17.6

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Jlenok [28]
What what what??????
6 0
3 years ago
40 points please help
Lera25 [3.4K]

answer:

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step-by-step explanation:

4 0
3 years ago
You randomly select one card from a 52-card deck. Find the probability of selecting a two or a five.
Vladimir79 [104]

Answer:

2/13

Step-by-step explanation:

there are 4 5s and 4 2s so

8/52

simplified is 2/13

3 0
3 years ago
I just need help explaining it. solve the system of equation
Maksim231197 [3]

SOLUTION

Write out the equation

\begin{gathered} y=\frac{1}{3}x-3 \\ 5x-3y=-3 \end{gathered}

To solve this system of equation, the aprropriate method will be substitution

Substitute the expression for y into the second equation for y, we have

5x-3(\frac{1}{3}x-3)=-3

Expand the paranthesis we have

\begin{gathered} 5x-x+9=-3 \\ \text{Simplify},\text{ by subtracting 9 from both sides } \\ 4x+9-9=-3-9 \\ 4x=-12 \end{gathered}

Divide both sides by 4, we have

\begin{gathered} \frac{4x}{4}=-\frac{12}{4} \\ \text{Then} \\ x=-3 \end{gathered}

Since the value of x has been obtained, we substitute into the first equation

\begin{gathered} y=\frac{1}{3}x-3 \\ \text{ recall x=}-3 \\ y=\frac{1}{3}(-3)-3 \\ y=-1-4 \\ \text{Hence } \\ y=-4 \end{gathered}

Therefore

x = -3, y= -4

6 0
1 year ago
Guys help me please
elena-14-01-66 [18.8K]

There are several ways that can help someone recover after they are injured. After the injury occurs, it is best to go to the doctor or hospital to get the injury, if need be, checked on or fixed. Another thing that can help is if the person rests and does not do any heavy-lifting or do to many activities that can strain the injury. After an injury occurs, if you do not rest there is more of a likelihood that you can damage it more and also rest helps the body heal. There are also several medicine's that are meant to help relieve pain after an injury occurs.


Hope it helps.

4 0
3 years ago
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