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neonofarm [45]
3 years ago
5

Monica is 400 miles away from home while her sister,Mary is 300 miles away.Say monica travels at a speed of 50 miles per hour an

d Mary travels back at a speed of 40 miles per hour.Solve the system of equation and graph it. When are the two sisters the same distance frome home
Mathematics
2 answers:
saveliy_v [14]3 years ago
7 0
400,300
350,260
300,220
250,180
200,140
150,80
100,40
50,0
0,0

9 hrs?
abruzzese [7]3 years ago
3 0

Answer:

7.75 hours

Step-by-step explanation:

Distance = Rate times Time

Monica 400=50xT

Mary 300=40xT

Monica 400/50=T, so T=8 hours.  This is how long it takes her to get home.

Mary 300/40=T, so T=7.5 hours.  This is how long it takes her to get home.

The difference in time between 7.5 and 8 hours is 7.75 hours.  This is the time they will be an equal distance from home.

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PLEASE HELP!!
artcher [175]

To solve for f, you need to isolate/get the variable by itself in the equation:

4(0.5f - 0.25) = 6 + f       Distribute 4 into (0.5f - 0.25)

(4)0.5f + (4)(-0.25) = 6 + f

2f - 1 = 6 + f        Subtract f on both sides to get "f" on one side of the equation

2f - f - 1 = 6 + f - f

f - 1 = 6       Add 1 on both sides to get "f" by itself

f - 1 + 1 = 6 + 1

f = 7

PROOF

4(0.5f - 0.25) = 6 + f      Substitute/plug in 7 into "f" since f = 7

4(0.5(7) - 0.25) = 6 + 7

4(3.5 - 0.25) = 13

4(3.25) = 13

13 = 13

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3 years ago
There are five different cards numbered 1 through 5. Assume the cards are randomly chosen. If the first card picked was a 2 and
alexandr402 [8]

Answer:

Step-by-step explanation:

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3 years ago
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Shtirlitz [24]
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2 years ago
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Alenkinab [10]

Answer:

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trapecia [35]
<h3><u>3</u><u>6</u> is the answer.</h3>

Step-by-step explanation:

Put value of b as given and using BODMAS rule,

6(2b - 4)

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=  > 36

Henve, value of of the given expression is 36

7 0
2 years ago
Read 2 more answers
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