All categories

3 years ago

You have 12 CDs and choose 4 of them to play one evening. How many

Mathematics

1 answer:

e-lub [12.9K]3 years ago

4 0

Answer:

3 orders of CDs

Step-by-step explanation:

So if you have 12 CDs and you are choosing 4 for one evening you get 8 more CDs for 3 evening.So what i did is 12 - 4 and it is equal to 8 CDs and You divide 4 in to 12 and it gives you 3.Your answer is 3 order of CDs because the question is asking how many order of CDs are possible for playing 4 CDs?

You might be interested in

Solve for x.<br><br> And show work

STatiana [176]

The answer to x is 5.

3 0

3 years ago

Easton and Eli go to the movie theater and purchase refreshments for their friends.

Hatshy [7]

Answer:

Price of one bag of popcorn: $9.5

Price of one drink: $5.5

Step-by-step explanation:

Let be "b" the price in dollars of a bag of popcorn and "d" the price in dollars of a drink.

You know that the total amount of money Easton spends on on 9 bags of popcorn and 6 drinks, is $118.50. Then,this can be represented with the following equation:

$9b+6d=118.50$

Knowing that Eli spends $83.50 on 3 bags of popcorn and 10 drinks, you can write the second equation:

$3b+10d=83.50$

Then, the System of equations is:

$\left \{ {{9b+6d=118.50} \atop {3b+10d=83.50}} \right.$

You can use the Elimination methot to solve it:

1. Multiply the second equation by -3.

2. Add both equations.

3. Solve for "d"

Then, you get:

$\left \{ {{9b+6d=118.50} \atop {-9b-30d=-250.5}} \right\\............................\\-24d=-132\\\\d=5.5$

4. You can subsitute "d" into the second equation and solve for "b":

$3b+10(5.5)=83.50\\\\3b=83.50-55\\\\b=9.5$

3 0

3 years ago

How to do y=5x+2 and 3x=-y+ 10

Sunny_sXe [5.5K]

Answer:
y = 5x + 2
5 is the slope 2 is the y-intercept
3x = -y + 10 turns into y = -3x + 10
-3 is the slope 10 is the y-intercept
they intersect at (1, 7)

step-by-step explanation:
I’m not sure what you are wanting me to do with these but i will give you all the information about them
y = 5x + 2 is already in slope-intercept form
5 being the slope and 2 being the y-intercept
to solve for 3x = -y + 10
-3x+y +y-3x
y = -3x + 10
the slope is -3
the y-intercept is 10
they intersect at (1, 7)

5 0

3 years ago

A catering service offers 4 appetizers, 9 main courses, and 7 desserts. A customer is to select 3 appetizers, 2 main courses, an

never [62]

Answer:

In 5040 ways.

Step-by-step explanation:

To solve this problem we will use combination without repetition which means:

C ( n k) = (n₁ k₁) (n₂ k₂) (n₃ k₃) = (4 3) (9 2) (7 3) =

(4 · 3 · 2 / 3 · 2 · 1) (9 · 8 / 2 · 1) (7 · 6 · 5 / 3 · 2 · 1) = 4 · 36 · 35 = 5040

It can be done in 5040 ways.

God with you!!!

6 0

3 years ago

Under which isometry is the slope of line segment equal to the slope of it's image?

Novay_Z [31]

Best Answer : A glide reflection.

3 0

3 years ago