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4 years ago

Write a number 0.5 in the form a/b, using integers, to show that it is a rational number.

Mathematics

1 answer:

tia_tia [17]4 years ago

6 0

5/10=05 so your answer is c

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82+9(12/3*2)-7 ? <br> SHOW ALL WORK

oksano4ka [1.4K]

Answer:

Step-by-step explanation:

we have:

82+9(12/3*2)-7

82+9(12/6)-7

82+9(2)-7

82+18-7

3 0

3 years ago

Read 2 more answers

1. How many ways are there to make an octagon with 19 different sticks when order DOESN’T matter?

Oksanka [162]

Answer:

1. 75582

2. 3047466240

Step-by-step explanation:

1. If order does not matter, this is a combination problem. You are choosing 8 sticks from a set of 19. (Octagons have 8 sides.)

The formula for combinations of n things chosen r at a time "n choose r" is

$_nC_r = \frac{n!}{r!(n-r)!}$

$_19C_8=\frac{19!}{8!(19-8)!} = \frac{19!}{8!11!}=75582$

2. If order matters, there are more possibilities. This is a permutation problem. The number of permutations of 19 things taken 8 at a time, "19 permute 8" is

$_nP_r=\frac{n!}{(n-r)!} \\ _{19}P_8=\frac{19!}{(19-8)!} = 3047466240$

6 0

3 years ago

Which expression is equivalent to 4/9(2n-3)

natali 33 [55]

Answer:

$\large\boxed{\dfrac{8}{9}n-\dfrac{4}{3}}$

Step-by-step explanation:

$\dfrac{4}{9}(2n-3)\qquad\text{use the distributive property}\\\\=\left(\dfrac{4}{9}\right)(2n)+\left(\dfrac{4}{9}\right)(-3)=\dfrac{8}{9}n-\dfrac{4}{3}$

8 0

3 years ago

Read 2 more answers

Ten students share 8 pieces of poster board equally. what fraction of a piece of poster board does each friend get?

padilas [110]

8:10= 0,8

0,8 or 4/5
hope this help

7 0

4 years ago

Two lighthouses flash their lights every 20 and 30 seconds respectively. given that they flash together at 8 p.m., at what time

VikaD [51]

Do you remember when you were learning about
Least Common Multiple (LCM) ? And you were
wondering what on Earth you would ever need it for ?

THIS IS IT !

The amount of time after 8 PM when the lights will flash
together again is the LCM of 20 seconds and 30 seconds.
Do you remember how to find it ?

... When 20 is prime-factored, you have 2 · 2 · 5 .

... When 30 is prime-factored, you have 2 · 3 · 5 .

... So the Least Common Multiple of 20 and 30 is 2 · 2 · 3 · 5 = 60 .

The lighthouses will flash together again in 60 seconds after 8 PM.
That'll be 8:01 PM.

6 0

3 years ago