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4 years ago

There are seven roads that lead to the top of a hill. How many different ways are there to reach the top and then go back down?

Mathematics

2 answers:

Ronch [10]4 years ago

8 0

Answer: 49 ways

Step-by-step explanation: 7 possible ways up, 7 ways down

Up and back on Rt 1, Up on Rt 1 down on Rt2 Up on Rt 1 down on Rt3. . . . . Up on Rt 7, down on Rt7

You can imagine what was left out of the explanation.

Just Multiply 7×7 = 49

rjkz [21]4 years ago

4 0

Answer:

two I have no idea of the question

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A finite population consists of four elements: 6, 1, 5, 3. (a) how many different samples of size n = 2 can be selected from thi

Ber [7]

Since the order of elements doesn't matter, we use the formula for combination as follows.

$nCk= \frac{n!}{k!(n-k)!}$

So the number of ways to choose 2 elements from a set of 4 elements would be
$4C2= \frac{4!}{2!(4-2)!}=6$

Thus the answer is 6.

5 0

3 years ago

lena has bought 10 pounds of dog food. she feed her dog 2/5 pounds for each meal for how many meals will the food last

Pie

Answer:

Step-by-step explanation:

10÷2/5

=10•5/2

=5•5

=25

7 0

3 years ago

Austin began a repiping job with 26 yards, 2 feet, 5 inches of pipe. When he finished the job, he had 13 yards, 2 feet, 7 inches

My name is Ann [436]

Answer:

<em>He used 12.944... yards of pipe for the repiping job.</em>

Step-by-step explanation:

We know that, 1 yard = 3 feet and 1 feet = 12 inches.

That means, 1 yard = (3×12) inches = 36 inches.

So, 1 feet = $\frac{1}{3}$ yard and 1 inch = $\frac{1}{36}$ yard.

Thus, 26 yards, 2 feet and 5 inches $=(26+\frac{2}{3}+\frac{5}{36}) yards = 26.805... yards$

and 13 yards, 2 feet and 7 inches $=(13+\frac{2}{3}+\frac{7}{36}) yards = 13.861... yards$

So Austin began a repiping job with 26.805... yards of pipe and when he finshed the job, he had 13.861... yards.

So, the length of the pipe he used for the repiping job will be: $(26.805...-13.861...) yards = 12.944... yards$

8 0

3 years ago

Read 2 more answers

Write a number with the digit 8 in the tens place

Anon25 [30]

80 because tens place is two over from the right

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3 years ago

Read 2 more answers

Solve 2/3x+1/2y=2 For y

Kaylis [27]

Answer:

y= -4x/3 + 4

Step-by-step explanation:

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4 years ago