How many different four digit numbers can you make with these?

Answers

Answer 1

Answer: with what?
because u didnot add any numbers 2 the question though

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What is the missing number in the data set 15,17,28,30 if the mean is 23

Answers

mean is add the numbers and divide the result by how many numbers there are
mean=23
1 missing number which is x
5 numbers including missing one
(15+17+28+30+x)/5=23
solve for x
multiply both sides by 5
15+17+28+30+x=115
add like terms
90+x=115
subtract 90
x=25

the missing number is 25

15+17+28+30=90, if theres another number than there r 5 total numbers, 23*5=115, 115-90=25, so 25

100 to 150? Need this before midnight!

Answers

sum of 100 to 150:
a=100 n=50
a50=150
sn=n/2(a+an)
=50/2(100+150)
=25*250
=6250

anita has two sisters and three brothers. the mean of all their ages is 6 years. what will their mean age be 10 years from now?twenty years from now?

Answers

Answer:
Now: 6 yr mean age
in 10 yrs? 16 yr mean age
in 20 yrs? 26 yr mean age

Why? Because regardless of the relationship between each sibling's age, your always adding the 10yrs to each individual, which you are then dividing out to determine the mean age. See proof below:

Including anita, there are 6 people. We'll define each age as an unknown variable. Assume we know nothing about the relationships between their ages

for example sake
anita's age = a
sister 1's age = b
sister 2's age = c
brother 1's age = d
brother 2's age = e
brother 3's age = f

Now:
mean age = (a + b + c + d + e + f)/(6 people) = 6 yrs

in 10 yrs:
mean age = ((a+10) + (b+10) + (c+10) + (d+10) + (e+10) + (f+10))/(6 people)
mean age = (a + b + c + d + e + f + 60)/(6 people)
mean age = (a + b + c + d + e + f)/(6 people) + (60)/(6 people)
mean age = (a + b + c + d + e + f)/(6 people) + 10

Notice the first term is the same expression of the mean age for "Now"
Thus, in 10 yrs:
mean age = 6 + 10 = 16 yrs

The same principle applies for "x" yrs from now, as long as we know what the mean age is "Now"

Answer:

10 years from now= 16

20 years = 26

Step-by-step explanation:

Can you guys show me your work too please? :)Alisha wants to buy a camera that costs $228,including tax. She has saved $4.75 each week for the past 8 weeks. How much more money does Alisha need to purchase the camera?

Answers

Tell you what I'm gonna do: I'll show you the work, and then
YOU can take the final steps to the answer.

Alisha needs $228.
She has been saving up for it.
How much more does she need ?
We'll know that, as soon as we figure out how much she has now.

She has saved $4.75 each week for the past 8 weeks.
That means she has put $4.75 into a jar 8 times.
So now, she has 8 times $4.75 .

How much is 8 times $4.75 ?

The difference between $228 and that number
is how much more she needs.

Over to you.
Take it !

Jill’s front door is 42” wide and 84” tall. She purchased a circular table that is 96 inches in diameter. Will the table fit through the front door?

Answers

Answer:

No, the table will not for through the door

Step-by-step explanation:

A door is known to be rectangular in nature. If Jill’s front door is 42inches wide and 84inches tall and we are to determine if the circular door will fit into the door, this means that the circumference of the circular table must be lass than the width of the door.

Circumference of a circle = πd

Given diameter d = 96inches

Circumference = π(96)

Circumference of the table = 301.59inches

Jill's door width = 42inches

Since the circumference of the circular table is greater than the width of the rectangular door, this shows that the table will not fit through the door.

For the table to fit in the circumference must be lesser than the width of the door

This problem involves trying to find the diagonal of the rectangle given. This is equal to the hypotenuse of a triangle with one length side and one width side as its legs. The formula for finding this hypotenuse is c = √(a^2 + b^2). So plug in 84 and 42 and we get approximately 93.9, which is just over 2 inches short of getting the table through the door.

PLEASE HELP could this be 110, maybe?? I've tried both 40 and 100 already.

Answers

Answer:

80°

Step-by-step explanation:

<A+<B+<C=180

30+<B+70=180

100+<B=180

<B=180-100

= 80

consider triangle ABC and triangle EDC

AC=CE (given

BC=CD (given

<ACB=<ECD (vertically opposite angles are equal)

therefore triangle ABC is congruent to triangle EDC

<B=<D (CPCT)

180-70-30=80
The answer is 80
The two triangles are the same.
Corresponding angles of congruent triangles are equal.
A triangle's three angles add up to 180 degrees.

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