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2 years ago

Josie hikes at 2 and 3/4 miles per hour. How long will it take her to hike 9 and 5/8 miles?

1 answer:

6 0

First, let's convert the givens to decimals to make calculations easier:
2 (3/4) = 2.75
9(5/8) = 9.625

We are given that:
Josie can hike 2.75 miles in one hour.
To know the time that Josie would take to hike 9.625 miles, we will simply do cross multiplication as follows:
2.75 miles ..........> 1 hour
9.625 miles .............> ?? hours

Time = (9.625*1) / (2.75) = 3.5 hours

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What is the graph for the transforming function y=−(−x) 2

Alex17521 [72]

Answer:

axis of symmetry is x=0

vertex is (0,0)

Step-by-step

math

way is good to use it's a calculator site

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3 years ago

What is the best first step for solving the given system using substitution while avoiding fractions? =9x+4x=10 -9x+3y=3

aivan3 [116]

Answer:

Solve for y in the second equation

Step-by-step explanation:

We assume your system is ...

-9x +4y = 10
-9x +3y = 3

Dividing the second equation by 3 gives ...

-3x +y = 1

so an expression for y without fractions can be found by solving for y, that is, by adding 3x:

y = 3x +1

_____

Comment on alternate solution

We'd be tempted to solve the first equation for -9x and substitute for that.

-9x = 10 -4y

(10 -4y) +3y = 3 . . . . . substitute for -9x

-y = -7 . . . . . . . . . . . . . simplify, subtract 10

y = 7 . . . . . . . . . . . . . . multiply by -1

3 0

3 years ago

Read 2 more answers

How much pure acid should be mixed with 6 gallons of a 50% acid solution in order to get a 70% acid solution?

Mashutka [201]

To help with thinking about this, we can say that the 6 gallons of 50% acid contains 3 gallons of pure acid and 3 gallons of filler. This would make the concentration 3/6, or 50%. Adding a gallon of pure acid would shift the concentration to 4/7, or 57.1%.

When the relationship becomes 70%, four gallons of pure acid have been added.

3+4 7
—— = — = 70%
6+4 10

3 0

2 years ago

Among fatal plane crashes that occurred during the past 5050 years, 699699 were due to pilot error, 8888 were due to other hum

lapo4ka [179]

Answer: Crashes due to pilot error is the most serious threat to aviation safety as it has highest relative frequency.

Step-by-step explanation:

Since we have given that

Number of crashes due to pilot error = 699

Number of crashes due to other human error = 88

Number of crashes due to mechanical problems = 156

Number of crashes due to sabotage = 164

Total number of crashes = 699+88+156+164 = 1167

So, Relative frequency distribution :

Pilot error = $\dfrac{699}{1167}\times 100=59.89\%$

Human error = $\dfrac{88}{1167}\times 100=7.54\%$

Mechanical problems = $\dfrac{156}{1167}\times 100=13.36\%$

Sabtoge = $\dfrac{164}{1167}\times 100=14.05\%$

Crashes due to pilot error is the most serious threat to aviation safety as it has highest relative frequency.

6 0

3 years ago

I need help pls help me

FinnZ [79.3K]

1. Common ratio is 5
2. 47
3. I believe the answer is -18, though you might want a second opinion on it to make sure it's correct.

Hope this helped! Good luck! :)

4 0

3 years ago