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
PIT_PIT [208]
3 years ago
7

The equation y=x^2-12x+45 models the number of books y sold in a bookstore x days after an award-winning author appeared at an a

utograph-signing reception. What was the first day that at least 100 copies of the book were sold?
Mathematics
1 answer:
romanna [79]3 years ago
7 0
Answer: The first day the author reaches 100 days is on day 16.

To solve this problem, you could use a graphing calculator to graph the given equation. Then, determine when this line crosses 100. It crosses when x = 15.539. Therefore, we would have to round up to 16 so it is at least 100.

You could use the quadratic equation to solve: 100 = x^2 -12x + 45

Either you will get 16. If you use the quadratic formula, make sure to only use the positive answer.
You might be interested in
Write as an algebraic expression. "The difference between a number and -13
melisa1 [442]
n - (-13)
= n + 13
3 0
2 years ago
Carmelo farms a tract of land that typically yields 64.9 kilograms of corn. A fertilizer manufacturer claims that its fertilizer
muminat

Answer: 107.09 kilograms

Step-by-step explanation:

64.9 + 65% of 64.9

64.9 + (0.65 * 64.9)

64.9 + 42.19

7 0
2 years ago
Can someone help me with this
Alborosie

ok

3 0
2 years ago
What number should be placed in the box to help complete the division calculation?
LenKa [72]

Answer:

25

Step-by-step explanation:

25x14=350

8 0
3 years ago
Write and graph exponential functions to model the number of students at school A and at school B as a function of number of yea
Westkost [7]

Answer:

2^8 2x2x2x2x2x2x2x2=256

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • If h(x) = -2x – 10, find h(-4).<br> -2<br> -18<br> -3<br> -16
    5·2 answers
  • Kristen takes 2 pages of notes during each hour of class. Write an equation that shows the relationship between the time in clas
    15·1 answer
  • If a is a negative number, then a(1/a) is equal to -1. If a is a negative number and b is a negative number, then product ab is
    10·1 answer
  • A card is chosen at random from a deck of 52 cards it is replaced and a second card is chosen what is the probability both cards
    6·2 answers
  • Solve the equation cos(x + 60) =2sinx
    12·1 answer
  • Suppose that: (x-(x-y))-((x-y)-x)=14 what is x
    10·1 answer
  • You have 600 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river
    11·1 answer
  • Apples sell for $1.90 per pound, and bananas sell for $0.75 per pound. Troy bought some apples and some bananas. Together they w
    13·2 answers
  • Elijah is taking a multiple choice test with a total of 100 points available. Each question is worth exactly 2 points. What woul
    14·2 answers
  • ERROR ANALYSIS Describe and correct the error in solving the equation.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!