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
butalik [34]
2 years ago
9

Find the value of a and of b for which(a) the solution of x2 + ax < b is-2<x < 4​

Mathematics
1 answer:
KengaRu [80]2 years ago
3 0

Answer: a = -2

b = 8

Step-by-step explanation:

Given :

x^{2} +ax

re - writing the equation , we have

x^{2} +ax-b

we need to find the value of a and b for which -2<x < 4 , this means that the roots of the quadratic equation are -2<x < 4.

The formula for finding the quadratic equation when the roots are known is :

x^{2} - sum of roots(x) + product of root = 0

sum of roots = -2 + 4 = 2

product of roots = -2 x 4 = -8

substituting into the formula , we have:

x^{2} -2x-8=0 , which could be written in inequality form as

x^{2} -2x-8

comparing with x^{2} +ax-b , it means that :

a = -2

b = 8

You might be interested in
❗️❗️❗️❗️ <br> PLEASE HELP I WILL REWARD YOU AS BRAINLY
Fudgin [204]
Your answer:1/5 Hope this helps!
3 0
3 years ago
Can you helpppp pleasse
ryzh [129]

Answ 456

Step-by-step explanation:

ask your mom she might know unless she is to craycray

7 0
3 years ago
The line plot (shown in the attached image) shows the prices of sunglasses at a department store.
Andru [333]

a. The median is 70, the mode is 60, and the mean is 70.8.

b. Mean best captures the data.

c. When there are outliers, the mean might be a deceptive center measure.

Calculating the Mean, Median, and Mode

Mean: Total number of sunglasses / total quantity of pries

Mean = (20 + 20 + 50 + 50 + 50 + 60 + 60 + 60 + 60 + 60 + 60 + 70 + 70 + 70 + 80 + 80 + 80 + 80 + 90 + 90 + 90 + 90 + 100 + 100 + 130) / 25

Mean = 70.8

Median is equal to the (n/2 + 1)th term.

The number of sunglasses in this case is n.

(25/2 + 1)th term as the median

Median = 13th term

Median is 70

Mode is  the most frequent data

Therefore, mode = 70

Why is mean the most appropriate central measure ?

The mean is often the ideal measure of central tendency to use when your data distribution is continuous and symmetrical, such as when your data are normally distributed. So, mean here denotes the typical cost of the sunglasses.

Learn more about mean here:

brainly.com/question/17060266

#SPJ1

5 0
2 years ago
how would you expect the graph of g(x)=f(x-h) to be related to the graph of f(x) when h is a negative number.
Kruka [31]

Answer:


Step-by-step explanation:

The graph of g(x) would be the same as that of f(x) EXCEPT that the graph of g(x) would be translated h units to the left.  For example, if you had f(x-[-5]), the graph of f(x) would be translated 5 units to the left.

3 0
3 years ago
A book of stamps costs $9.80 $ 9 . 80 . The expression 9.8 9 . 8 n represents the price of one stamp. What does the variable n r
andreev551 [17]

Answer: n represents the amount a stamp cost

Step-by-step explanation:


7 0
3 years ago
Other questions:
  • 8.6 dived by 3.3 and the other way around
    10·1 answer
  • Nadia brought 4.3 pounds of ham on Tuesday and 1.7 pounds of ham on Wednesday. She spent a total of $41.94.What was the price of
    10·2 answers
  • Please please please help answer number 6!!!!!!
    14·1 answer
  • What is 15.47 rounded to the nearest whole number?
    10·2 answers
  • Okay so i have to solve equations with variables on both sides. i need the steps for this problem
    9·1 answer
  • Two cards are drawn at random from a standartd deck of 52 cards. what is the probability that both cards are aces?
    7·1 answer
  • 22. Draw Conclusions lf two angles are complementary, each angle is called
    9·2 answers
  • A submarine descended 3/5 of a kilometer in 1/5 of an hour. What was the submarine’s rate of descent in kilometers per hour?
    12·2 answers
  • What percent is the shaded portion of the entire diagram?<br><br><br> 9%<br> 40%<br> 45%<br> 90%
    7·2 answers
  • PLEASE HELP IM TAKING A TEST!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!