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
gregori [183]
3 years ago
10

Help me please!!! i need help

Mathematics
1 answer:
katen-ka-za [31]3 years ago
3 0

Answer:

Step-by-step explanation:

P = 1800 + 700x - 100x²

Find x when p = $2,800

2,800 = 1800 + 700x - 100x²

- 100x² + 700x + 1800 - 2800 = 0

-100x² + 700x - 1000 = 0

- x² + 7x - 10 = 0

a = -1

b = 7

c = -10

x = -b ± √b² - 4ac / 2a

x = -7 ± √7² - 4(-1)(-10) / 2(-1)

= -7 ± √49 - 40 / -2

= -7 ± √9 / -2

= -7 ± 3 / -2

= (-7 + 3) / -2 or (-7 - 3) / -2

= -4 / -2 or -10 / -2

x = 2 or 5

x = 2 items for smaller value

x = 5 items for larger value

You might be interested in
A cup of dog food weighs 1 and 7/8 ounces. My dog eats 5 cups per day. How many ounces of dog food does he eat?
Aneli [31]

Answer:

9 3/8 ounces of dog food

Step-by-step explanation:

1 cup = 1 7/8 ounces

1 7/8 + 1 7/8 = 2 14/8 = 3 6/8

3 6/8 + 1 7/8 = 4 13/8 = 5 5/8

5 5/8 + 1 7/8 = 6 12/8 = 7 4/8

7 4/8 + 1 7/8 = 8 11/8 = 9 3/8

8 0
3 years ago
PLEASE HELP WILL GIVE BRAINLIEST. IM AN EXPERT AND THSI IS STILL HARD. 18+20.
fenix001 [56]

Answer:

38

Step-by-step explanation:

5 0
3 years ago
A physics book is 1.5 inches thick. How many books would it take to make a stack 2 yards high?
bearhunter [10]
48 books

1 yard = 36in
2 yard = 72in

72 / 1.5 = 48
4 0
3 years ago
Jessica is purchasing a new car whose MSRP is $19,750. She is trading in her old car for $8100 and being upgraded to a premium p
andrew-mc [135]

Jessica is purchasing a new car whose MSRP is $19,750. She is trading in her old car for $8100.

Without the upgrade package and delivery charge , the cost of her car is

19,750 - 8100 = $11650

upgraded cost = $6000 and  Vehicle delivery =  $600. we add the upgraded cost and delivery cost.

Total cost of car = 11650 + 6000 + 600 = $18,250


6 0
3 years ago
Read 2 more answers
The area of a rectangle playgrond is 138 square meters. If the length of the playground is 21 meters, what is its width?
Likurg_2 [28]

Answer:

6.57m i think

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Find the 12th term of the following geometric sequence.<br> 10, 30, 90, 270,
    14·1 answer
  • Justin had 44 dollars before spending n dollars on jeans. How much money remains
    5·1 answer
  • 7. 48 pounds are equal to approximately _______ kg.
    10·2 answers
  • Will measured the diameter of a penny as 1.9 cm using the ruler. What is the margin of error? 1.5 cm to 2.0 cm 1.5 cm to 2.5 cm
    12·2 answers
  • Rectangle ABCD has vertices A(–6, –2), B(–3, –2), C(–3. –6), and D(–6, –6). The rectangle is translated so that the coordinates
    15·2 answers
  • What is the answer to the question I’m a bit confused
    6·1 answer
  • almost how many cubes of length 5 cm can be contained in a cuboid of length 20cm, breadth 10 cm,and height 5 cm?find it.​
    11·1 answer
  • Someone please help with the Determine Rate of Change Question I’m gonna fail please help me
    15·1 answer
  • How much will the students save if they work together to install the grass themselves as opposef to having the landscaper instal
    6·1 answer
  • What was the average acceleration of the car from 40 seconds to 46 seconds? Include the correct units. Remember that Δ means fin
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!