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Semenov [28]
3 years ago
10

Chris walked for 3 miles on his hike. How many feet did Chris walk on his hike? (1 mile = 5,280 feet) A. 1,760 feet B. 5,277 fee

t C. 5,283 feet D. 15,840 feet
Mathematics
2 answers:
Rudik [331]3 years ago
8 0
3 x 5280 = 15840 feet

therefore the answer is 15840 feet (D) 
Sever21 [200]3 years ago
5 0
D.15,840 feet.........
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irena’s boat traveled 76 miles downstream in 4 hours. on the way back it took her 5 hours and 30 minutes to travel 38.5 miles. i
Oxana [17]

Answer:

The speed of the boat in still water is 13 miles/hour.

The speed of the current is 6 miles/hour.

Step-by-step explanation:

Let the speed of the boat in still water be x

And speed of the current be  y

When Irena's travelling downstream, the speed of the boat is:

Speed=\frac{76 miles}{4 hours}=19 miles/hour

Traveling down stream the speed of the boat will be :

x+y=19..(1)

When Irena's travelling upstream, the speed of the boat is:

Time taken by boat = 5 hours and 30 min = 5.5 hours (1 hour = 60 min)

Speed=\frac{38.5 miles}{5.5 hours hours}=7 miles/hour

Traveling down stream the peed of the boat will be :

x-y=7..(2)

On Solving both equation (1)and (2).

x+y=19

x=19-y putting value of x in (2) equation

19-y-y=7

y = 6 miles/hour

Putting value of y in (1) equation:

x+6=19 , x = 13 miles/hour

The speed of the boat in still water is 13 miles/hour.

The speed of the current is 6 miles/hour.

4 0
3 years ago
Read 2 more answers
Convert <br> [−1,∞) to inequality notation use the variable x.
Trava [24]

Answer:

-1\leq x

Step-by-step explanation:

We want to convert the interval [-1, ∞) to inequality notation using <em>x</em> as the variable.

The interval [-1, ∞) reads: "All real numbers between -1 and positive infinity."

In other words, it is all numbers greater than or equal to -1 and less than positive infinity.

Therefore:

-1\leq x

Note that we do not use "or equal to" for the infinity as we can never really "equal" infinity.

8 0
3 years ago
If 12 is replaced with 3 in the following set, what will happen to the value of the range? 28, 45, 12, 34, 36, 45, 19, 20
anzhelika [568]
The range is the number of units between the smallest and largest number. organising your numbers from smallest to largest:

12, 19, 20, 28, 34, 36, 45, 45

in your case 12 is the smallest number of your set. lowering it to 3 would increase the distance between the two numbers, therefore increasing the range

hope that helps :)
3 0
3 years ago
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Use a system of equations to solve this problem.
andrew-mc [135]
A system is:
1.25 x + 2.25 y = 16
x + y = 8
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y = 8 - x
1.25 x + 2.25 * ( 8 - x ) = 16
1.25 x + 18 - 2.25 x = 16
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- x = - 2
x = 2
y = 8 - 2
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Answer:
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What is the volume of 2 1/4 times 1 3/5 times 2 1/3
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I recommend the app desmos for problems like this. the answer is 8.4
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