1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Semmy [17]
3 years ago
6

I have $5$ different mathematics textbooks and $4$ different psychology textbooks. In how many ways can I place the $9$ textbook

s on a bookshelf, in a row, if there must be a psychology textbook exactly in the middle, and there must be a mathematics textbook at each end?
Mathematics
1 answer:
leonid [27]3 years ago
6 0

Answer:

What

Step-by-step explanation:

You can’t have more than 2 combinations with £9

You might be interested in
write the first six terms of the arithmetic sequence with the first term a1 =90 , and common differnce, d=9​
brilliants [131]
Given a1 = 90
Common difference = adding
90 + 9 = 99, second term
99 + 9 = 108, third term
And keep doing that
You would get
90, 99, 108, 117, 126, 135
8 0
3 years ago
What is 15% of 375?
lesya [120]
15% * 375 = 0.15*375 = 15*375/100=56.25
6 0
3 years ago
Read 2 more answers
A young boy has 40 total pets. He has two different types of pets. He has cats and penguins. The total number of the heads of hi
Nina [5.8K]

Answer:

He has 30 penguins and 10 cats.

Step-by-step explanation:

Let's define the variables:

C =  number of cats.

P = number of penguins.

We know that he has a total of 40 pets, then:

C + P = 40

We also know that the total heads (40 heads, each animal has one) plus the number of wings (P*2, each penguin has 2) is equal to the number of feet of his pets (4*C + 2*P, because each cat has 4 paws, and each penguin has 2)

Then we have the equation:

40 + 2*P = 4*C + 2*P

Notice that in the second equation we have the term 2*P in both sides of the equation, then we can just subtract 2*P in both sides to get:

(40 + 2*P) - 2*P = 4*C + 2*P - 2*P

40 = 4*C

Now with this, we can find the value of C.

40/4 = C = 10

Then he has 10 cats.

Now we can replace this in the equation:

P + C = 40

to find the value of P

P + 10 = 40

P = 40 - 10 = 30

P = 30

He has 30 penguins.

3 0
3 years ago
It is now quarter to ten. What time will it be in four hours and fifty-one minutes?
Veseljchak [2.6K]

Answer:it would be 2:22

Step-by-step explanation:

If there’s 25 minutes till 10 so therefore it would be 9:35 and since it’s 9:35 four hours and 51 minutes from then would be 2:22 because the minutes would add up to 82 minutes and four hours so your answers to 2:22

7 0
2 years ago
Write an algebraic expression with the variable x that has a value of 3 when evaluated
kari74 [83]
X=23

(x+5) - 25 = 3?

If this is what you mean.
7 0
3 years ago
Other questions:
  • write an equation in point-slope form that passes thru the given point and has the given slope? (5,2) m=3
    11·2 answers
  • A used CD is a dollar more than one third the price of a new CD. If a new CD costs $18, how much is a used CD
    14·1 answer
  • Which statements describe one of the transformations performed on f(x)=x^2 to create g(x)=2(x+5)^2+5
    8·1 answer
  • Six students are being grouped into three pairs to work on a science lab. how many different combinations of three pairs are pos
    7·1 answer
  • You make candles by adding 2 fluid ounces of scented oil for every 22 fluid ounces of wax. Your friend makes candles by adding 3
    13·1 answer
  • Which pair of points graphed below have values that are opposites
    8·2 answers
  • Choose the correct option
    9·2 answers
  • You have two rocks: Rock A has a mass of 40g and volume of 8cm3 and Rock B has a mass of 60g and a volume of 30 cm3. Which rock
    5·1 answer
  • A washer and dryer cost a total of $964 . The cost of the washer is three times the cost of the dryer. Find the cost of each ite
    6·2 answers
  • Im being timed so please be quick thank you !!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!