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
tatyana61 [14]
3 years ago
13

Last year, the school library had a total of x books. Over the summer, the library acquired another 35 books and now has a total

of 2,943 books. Which equation could be used to find x, the number of books the library had last year?
Mathematics
1 answer:
ki77a [65]3 years ago
6 0

Answer:

the equation is x= 2908

Step-by-step explanation:

you need to find the number of books they had by taking the new total and subtract it by the number they add and that would equal x in the problem

You might be interested in
Stu trained for a triathlon for 5 hours yesterday. He ran 5 miles and then biked 80 miles. His biking speed is 15 mph faster tha
lara31 [8.8K]

Answer:

Step-by-step explanation:

Given as :

The distance cover while running = D_1 = 5 miles

Let The speed for running = S_1

The distance cover with bike = D_2 = 80 miles

The speed for biking = S_2 = 15 mph +  S_1

Total Time taken = 5 hours

Now Time = \dfrac{\textrm Distance}{\textrm Speed}

∴ 5 hour = \frac{D_1}{S_1} +  \frac{D_2}{S_2}

Or,  5 hour = \frac{5}{S_1} +  \frac{80}{15+S_1}

Or, 5 hour = \frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}

or,  5 × (S_1^{2}+15 S_1) = 85 S_1 + 75

Or, 5 S_1^{2} + 75 S_1 -  85 S_1 - 75 = 0

or, 5 S_1^{2} -10 S_1 - 75 = 0

or,   S_1^{2} -2 S_1 - 15 = 0

Or, S_1^{2} -3 S_1 + 5 S_1- 15 = 0

Or, S_1 (S_1 - 3) + 5 (S_1 - 3) = 0

Or, (S_1 - 3) ( S_1 + 5 ) = 0

∴ S_1 = 3 , - 5

So, the running speed = 3 mile per hour

And the biking speed = 15 mph + 3 mph = 18 mile per hour

Hence The running speed of Stu is 3 mile per hour  .  Answer

7 0
3 years ago
A box contains marbles of five different colors: red, green, blue, yellow, and purple. there is an equal number of each color. a
olga nikolaevna [1]
P(red) = 1/5     [that says "probability of getting red is one fifth"
P(green) = 1/5
P(blue) = 1/5
P(yellow) = 1/5
P(purple) = 1/5

The reason the fractions are all the same is that there are equal numbers of each color.  For example, if there were 7 marbles of each color, there would be a total of 35 marbles.

P(red) = 7/35 = 1/5
Similar for the other colors.
6 0
3 years ago
I need help ,,, and tahnks☺
Mashcka [7]
Pythagora: 20^2=(4x)^2+(3x^2)
400=16x^2+9x^2
x^2=400/25
x^2=16
x=4
6 0
3 years ago
Read 2 more answers
If the exchange rate changes from​ $1.45 = 1 euro to​ $1.37 = 1​ euro, then
Leto [7]
The euro has depreciated and the dollar as appreciated
4 0
4 years ago
Does anybody know the answer??
alexandr1967 [171]

Answer:

i think the answer is c

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • In the year 2010 there were 1,500 foxes in a particular region. Since then, the population has increased by 2.5% per year. If th
    7·2 answers
  • At a supermarket, pineapple juice sells at $1 per pint (16 ounces). Greg wants to buy eighteen 40-ounce cans of pineapple juice
    7·1 answer
  • a school art teacher needs 200 sticks of clay. An art shop donates 9 small boxes and 6 large boxes of clay. the small boxes have
    6·1 answer
  • What is the value of the (x,y) point (3,1.5) in the function M = 4x + 2y?
    7·2 answers
  • (9x + 5 ) - (6x +-8)​
    8·1 answer
  • 18 is what percent of 52? Plz tell meeehhhhhh
    11·1 answer
  • Maryam has 12 cookies. She wants to give each of her 4 friends the same number of cookies. How many cookies will Maryam give eac
    12·2 answers
  • What is the resulting ordered pair if the value of the independent variable is 2?<br> f(x) = -5x + 4
    10·2 answers
  • Are the following figures similar?
    12·1 answer
  • HELP What is the length of FC?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!