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saw5 [17]
3 years ago
8

What is 4 (x-y) - 3 (x-y) ?

Mathematics
2 answers:
Anettt [7]3 years ago
7 0

Answer: x+y

Step-by-step explanation: 4x-4y-3x-3y

4x-3x is x

4y-3y is y

almond37 [142]3 years ago
4 0

Answer:

x-y

Step-by-step explanation:

First you must distribute:  

4(x-y)= 4x-4y

-3(x-y)=-3x+3y

4x-4y-3x+3y

Then combine like terms:

(be careful of negatives)

4x-<em>4y</em>-3x+<em>3y</em>

x-y

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What is the mean and median?
timama [110]

Answer:

Step-by-step explanation:

Mean roughly means the average of all the results. Add all of them up and divide it by the number of items there are. Median, basically means, you line them up from low to high numerically and the middle number.

6 0
3 years ago
Read 2 more answers
F(x)=x^3-2x^2-x what is f(-4)
steposvetlana [31]

Answer:

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5 0
3 years ago
Write a rule for the nth term of the arithmetic sequence described below.
belka [17]

Answer:

an = 115 + (n - 1) (-6)

a25 = - 29

Step-by-step explanation:

We use the definition for the nth term of an arithmetic sequence:

an = a1 + (n - 1) d

a5 = 91 = a1 + (5 - 1) d

91 = a1 + 4 d

a20 = 1 = a1 + (20 - 1) d = a1 + 19 d

1 = a1 + 19 d

now we subtract term by term one expression from the other

90 = 4 d - 19 d

90 = - 15 d

divide both sides by -15 to isolate d

d = 90 / (-15) = -6

Now we can calculate what a1 is using for example:

1 = a1 + 19 d

1 = a1 - 114

add 114 to both sides:

115 = a1

Then our general expression for the sequence is:

an = 115 + (n - 1) (-6)

We can now use it to calculate the value of a25:

a25 = 115 + (24) * (-6) = -29

7 0
2 years ago
From a group of 11 people, you randomly select 4 of them. what is the probability that they are the 4 oldest people in the group
Andre45 [30]

Answer:

<u>1/ 130 is the probability that they are the 4 oldest people in the group. </u>

Step-by-step explanation:

In the question, we are given; group of 11 people, 4 are selected randomly, find probability they are the 4 oldest people from the group

P(O)= <em>favorable number of outcomes / total number of outcomes </em>

<h3>= 1 / 11C4</h3>

=  11! / (11-4)! 4!

=  7! *4! / 11!

=1/ 130

<em>Therefore, 1 / 130 is the probability that they are the 4 oldest people in the group. </em>

#SPJ4

5 0
1 year ago
How do the height and the slant height of a pyramid differ?
Kryger [21]
So slant height is the length of a lateral face

imagine a pyramid was hollow.

the height is the distance from center of the bottom... to the point.

the slant height tho... imagine if u unfolded it and laid it out flat on the ground
the slant height is the distance from the point of a face to the middle of the bottom. so your splitting the face into 2 equal triangles... right down the middle. slant height is bigger... always
7 0
3 years ago
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