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3 years ago

Christine biked 36 miles in 6 hours. What is her average speed in miles per hour? Please answer

Mathematics

2 answers:

melomori [17]3 years ago

5 0

Answer:

6 mph

Step-by-step explanation:

36 divided by 6

Studentka2010 [4]3 years ago

3 0

Answer:

6 mph

Step-by-step explanation:

To find his average speed for each mile per hour, you start by dividing with the miles by the hours:

$36\div6=6$

If you multiply 6 by 6, you'll get 36.

6 is your final answer!

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How do I work this out

alukav5142 [94]

9514 1404 393

Answer:

no, it is good for 2 weeks (almost 3)

Step-by-step explanation:

The volume of the pool is ...

V = LWH

V = (20 m)(8 m)(1.8 m) = 288 m³

Then the amount of chlorine powder needed for 1 week is ...

(300 g/(50 m³)) × (288 m³) = 1728 g

A box of 5000 g holds enough chlorine for ...

(5000 g)/(1728 g/treatment) = 2.89 treatments

A box of chlorine powder is enough for 2 weeks, not 4.

5 0

3 years ago

3 of the digits 0-9 are chosen randomly by a computer what is the probability that it will choose 3 sequential digits?

Sindrei [870]

Answer:

B. 1/15

Step-by-step explanation:

The number of ways in which we can select x elements from a group of n elements is calculated as:

$nCx=\frac{n!}{x!(n-x)!}$

So, the number of ways in which a computer can select 3 digits is calculated as:

$10C3=\frac{10!}{3!(10-3)!}=120$

Because there are 10 digits from 0 to 9.

Then, from that 120 options there are 8 that have 3 sequential digits. These options are:

{0,1,2} {1,2,3} {2,3,4} {3,4,5} {4,5,6} {5,6,7} {6,7,8} {7,8,9}

So, the probability that it will choose 3 sequential digits is equal to:

$P=\frac{8}{120}=\frac{1}{15}$

7 0

3 years ago

The ratio of boys to girls at the movie is 4:7. If there are 21 girls l, how many boys are at the movie?

Gelneren [198K]

There are 12 boys 21/7=3 so 4(3)= 12
You are welcome

7 0

3 years ago

A father is 60 years old and his son is half his age. How old was the boy when his father was four times his age?

Anni [7]

Hey there! I'm happy to help!

We see that the father is 60 years old, and the son is half of that age, so this means that the son is 30 years old.

We want to see the age the son was at when the father was four times his age. We know that the father is thirty years older than him, so we can write this equation with s representing the age of the son.

s+30=4s (30 years older than the son is equal to to four times the son's age at the time)

We subtract 30 from both sides.

s=4s-30

We subtract 4s from both sides.

-3s=-30

We divide both sides by -3.

s=10

Therefore, the boy was 10 when his father was four times his age. This is because his father would have been 40 because that is 30 more years than 10, and it is four times ten!

Have a wonderful day! :D

4 0

3 years ago

How to solve this question? i have to have 3 solutions

Helen [10]

The picture is a bit blurry but what I saw was 8a^3+27=0

8a^3+27=0 first you move 27 to the right side of the equation

8a^3=-27 then you divide both sides by 8

a^3 = -27/8 then take the cubed root of both sides

a= -3/2

Hope that helps ;)

5 0

3 years ago