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
ivanzaharov [21]
3 years ago
7

Let f(x) =45x^2 – 2x + 1.  What is the value of f(5) · f(–10) – f(–5) · f(10)?

Mathematics
1 answer:
Murljashka [212]3 years ago
5 0
F(-10)=4521
f(-5)=1136
f(10)=4481
4521-1136·4481=-5,085,895 (with PEMDAS) 15168185 (in the order as is)
You might be interested in
What’s the answer show your WORK Plz
Yuliya22 [10]

Answer:

732.7 I think

Step-by-step explanation:

You just multiply 28 by 26.17

3 0
3 years ago
Read 2 more answers
I dont know how to do math 10 factors
pav-90 [236]

Answer:

10= 1 , 2 , 5 and 10

Step-by-step explanation:

Those are the factors of 10

4 0
3 years ago
PLEASE HELP!!!!<br> I need to solve for a, b, and c
nirvana33 [79]

Answer:

  • 25000 seats in section A
  • 14100 seats in sectin B
  • 10900 seats in section C

Step-by-step explanation:

The problem statement tells you half the total number of seats are in section A, so you already know that there are 25000 A seats. The revenue from those seats is

... 25000×$25 = $625,000

so the revenue from B and C seats must total

... $1,070,500 - 625,000 = $445,500

If all 25000 of the B/C seats were C seats, the revenue would be

... 25000×$15 = $375,000

The actual revenue from those seats is $445,500 -375,000 = $70,500 more than that. We know each B seat generates $5 more revenue, so there must be ...

... $70,500/$5 = 14,100 . . . . B seats

Then the balance of the 25000 B and C seats are C seats:

... 25,000 - 14,100 = 10,900 . . . . C seats

_____

<em>Alternate Solution Method</em>

The new Brainly answer format requires the answer be supplied before the working. In order to find the answer quickly so that I can fill in that section, I used a matrix method for solving the problem. The problem equations can be written ...

  • a + b + c = 50000
  • a - b - c = 0
  • 25a + 20b + 15c = 1070500

so the augmented matrix is ...

\left[\begin{array}{cccc}1&1&1&50000\\1&-1&-1&0\\25&20&15&1070500\end{array}\right]

A graphing calculator can be used to find the solution to this, generally using a function that produces the reduced row-echelon form. The attachment shows the solution using a TI-84 calculator.

___

<em>Comment on the Working</em>

Since the number of A seats is equal to the total of B and C seats, the number of A seats must be half the total number of stadium seats. Having figured that out, the problem is reduced to one of finding the mix of B and C seats that will produce the remaining revenue.

As with many mixture problems, it is convenient to look at differences. Start with the assumption that all of the desired revenue comes from the least contributor. Here, that is C seats. Then figure the difference that using a B seat makes ($20 -15 = $5) and the difference of the actual revenue and the amount that you got by assuming all C seats: 445,500 -375,000 = 70,500. Since replacing a C seat by a B seat adds $5 to the revenue, it is easy to figure the number of such replacements required in order to raise the revenue by $70,500.

If you write the equation for B seats, you find the solution to the equation mirrors this verbal description:

... 20b + 15(25000-b) = 445,500

... 5b = 445,500 - 375000 . . . . simplify, subtract 375000

... b = 70500/5 = 14100

8 0
2 years ago
Find the area of the circle below
tangare [24]

Answer:

28.27433

Step-by-step explanation:

using the pie radius squared formula

pie radius squared=pie 3 squared

5 0
3 years ago
Read 2 more answers
Show me how you ÷372÷4
Valentin [98]

Answer: 93

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Julia’s service at a beauty salon was $72.60, before tax. The sales tax rate was 8%. If she added 20% of amount before tax as a
    9·1 answer
  • I NEED HELP PLEASE !
    11·1 answer
  • Do these 3 and show your work
    8·1 answer
  • Eliminating by multiplying <br> X+3y=1<br> -5x+4y=-24
    15·1 answer
  • 56 / w x for 100 what is the meaning of W?
    7·1 answer
  • A. What is the area of the base? Use complete sentences to explain your reasoning.
    13·2 answers
  • A package of 5 pairs of insulated gloves costs ?$31.45. What is the unit price of the pairs of gloves??
    8·2 answers
  • I need help with this question.
    9·1 answer
  • write the equation and find the value of x. round side length to the nearest tenth and angle measures to the nearest degree​
    9·1 answer
  • How much is 12 cents + 5 dimes + one 5 cents equals?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!