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
6

Can somebody help me solve this problem .

Mathematics
2 answers:
aleksandrvk [35]3 years ago
7 0

Answer:

b = 40

Step-by-step explanation:

You want your discriminant to be zero because then you have exactly one solution.

Solve b²-4ac = 0

=>

b² - 4·400 = 0

b = ±√1600

so b=±40

but f(-20) also has to be 0

so b=40 remains as the solution

padilas [110]3 years ago
5 0

Answer:

b = 40

Step-by-step explanation:

If x = - 20 is a zero of f(x) then f(- 20) = 0 , that is

(- 20)² - 20b + 400 = 0

400 - 20b + 400 = 0

800 - 20b = 0 ( subtract 800 from both sides )

- 20b = - 800 ( divide both sides by - 20 )

b = 40

You might be interested in
What is the result when the number 48 is decreased by<br> 15%?
Hitman42 [59]

Answer:

40.8

Step-by-step explanation:

48 * .15 = 7.2

48 - 7.2 = 40.8

3 0
3 years ago
Read 2 more answers
What has a better deal? Daisy Sour Cream $1.49, or Kraft Sour Cream $2.55 for 16oz
almond37 [142]

Answer:

2.55

Step-by-step explanation:

5 0
3 years ago
9 3/4 - 1 1/4 in simplest form
Kipish [7]
8 1/2 would be the answer to this question
4 0
3 years ago
Determine the value of x and y in the following systems of equations5x-2y=4 ; -2x+y=2.
V125BC [204]

Answer:(x,y)=(8,18)

Step-by-step explanation:

Given

5x-2y=4-------1

Second Equation

-2x+y=2-----2

Now multiply equation 2 by 2 and it to equation 1

5x-4x+0=8

x=8

substitute it in equation 1

5\times 8-2\times y=4

36=2y

y=18

Therefore

(x,y)=(8,18)

7 0
3 years ago
Elyse has $18 on a gift card that she can use to rent movies online. The graph at the right shows the amount of money remaining
blsea [12.9K]

Answer:

see the explanation

Step-by-step explanation:

The complete question in the attached figure

Let

x ----> the number of movies

y ----> the amount of money remaining on her gift card

we know that

The slope of the linear equation is equal to the unit rate

take two points from the graph

(0,18) and (2,12)

Find the slope

m=(12-18)/(2-0)

m=(-6)/(2)=-\$3\ per\ movie ---> is negative because is a decreasing function

That means -----> Each movie she rents cost her $3, so her  gift card balance will decrease $3 for every movie rented

The linear equation is equal to

y=-3x+18

For y=0

0=-3x+18

x=6

so

6 is the maximum number of movies that Elyse can rent on line

6 0
3 years ago
Other questions:
  • Use the distributive property do you to write the express 1/2 4x-6y
    10·1 answer
  • The half-life of a radioactive kind of tellurium is 25 minutes. If you start with 88 grams of it, how much will be left after 50
    9·1 answer
  • Help me please I need itt!!!!!!!
    6·2 answers
  • 13.845 - 10.87-<br> What is this
    14·2 answers
  • Use the completing the square method to find the roots of 2x^2+3x-15=13 include the steps, it would be greatly appreciated thank
    5·1 answer
  • I need help finding the mean, median, and mode(s) I need help with number 7
    13·1 answer
  • Urgent math help needed will mark brainliest
    5·1 answer
  • Nicole shines a light from a window of a lighthouse on a cliff 250 feet above the water level. Nick 10 feet above the water leve
    10·1 answer
  • A right triangle has an area of 98 inches. If the triangle is an isosceles triangle, what are the lengths of the legs of the tri
    13·1 answer
  • Tracey ran 1.200 meters in 5 minutes. How many meters/minute did she run?​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!