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
tamaranim1 [39]
3 years ago
13

HELP PLEASE 100 POINTS

Mathematics
1 answer:
frosja888 [35]3 years ago
6 0

Answer:

Step-by-step explanation:

That's an awful lot of points. You don't have to give that many. 10 or 15 points would be more than enough.

The graph touches the x axis at 1 point. That means its basic formula is y = (x - a)^2

Since it  upside down, the formula is y = -(x - a)^2. A couple of other things are true.

a = 1 because that's where the graph touches the x axis. y = - x^2 has shifted 1 unit to the right.

Finally the y intercept is -4 which means that the final equation is y = -4(x-1)^2

That's all preliminary. The actual question is, what does the discriminate look like?

y = -4(x^2 - 2x + 1)

y = -4x^2 + 8x - 4

a = - 4

b = 8

c = - 4

sqrt(b^2 - 4ac)

sqrt(8^2 - 4(-4)(-4) )

sqrt(64 - 64) = 0

The answer is the third one. The answer will always be 0 when the graph touches the x axis and does not go through it.

You might be interested in
Aisha wants to paint the wall of the room. She knows that each can of the paint contain one gallon. A half gallon will completet
Sveta_85 [38]

Answer:

It doesn't say what to do with that 0.1 of a gallon. I would buy another gallon or dilute what I had so it came to exactly 9.1 gallons. In math, I suppose the answer is 9.

In reality it would be 10.

You have to choose.  What has been done with other questions like this.

Step-by-step explanation:

1 can covers 55 square feet.

h = 10

w1 = 10 feet

w2 = 10 feet

w3 = 15 feet

w4 = 15 feet

Total area = Area of wall 1 + wall 2 + wall 3 + wall 4

Total area = 10*10 + 10*10 + 10*15 + 10* 15

Total area = 100  + 100 + 150 + 150

Total area = 500  feet^2

1 gallon / 55 ft^2 = x / 500 ft^2          Cross multiply

55 * x = 500                                       Divide by 55

x = 500/55

x = 9.1 gallons.

In real life you would buy another gallon.

4 0
3 years ago
Out of 431 applicants for a job, 142 have over 5 years of experience and 103 have over 5 years of experience and have a graduate
Savatey [412]

Answer:

  • 0.2390

Step-by-step explanation:

<u>Given</u>

  • Total applicants = 431
  • Applicants with graduate degree and over 5 years of experience = 103

Probability = favorable outcomes/total outcomes

<u>Required probability </u>

  • 103/431 = 0.2390 rounded to 4 decimal places
3 0
4 years ago
Pleas help with geometry!!
erastova [34]

Answer:

Angles X and Z are supplementary, so 180-105. The answer is 75

4 0
4 years ago
Julie has been offered two jobs. The first pays $400 per week. The second job pays $175 per week plus 15% commission on her sale
noname [10]
So we solve for 1 week and set them equal to each other

first job pay=second job pay
400=175+15%ofsales
x=number of sales
400=175+0.15x
solve for x
subtract 175 from both sides
225=0.15x
divide both sides by 0.15
1500=x

she has to earn $1500 in sales per week to have as much as the other job
6 0
3 years ago
Read 2 more answers
a plumber charges $50 for every house call and an additional $70 for each hour of work for one house call yesterday the plumber
sleet_krkn [62]

Answer:

5.5 hours

Step-by-step explanation:

Since every house has an initial charge of $50, we can begin with that

($50)

Then, let's define h as the number of hours. We know every hour is $70, although the hours is yet unknown so that can be

($70 * h) or simply ($70h)

Now, we know the total should end up to be $435, so after PEMDAS the equation will be

($70h + $50 = $435).

We subtract 50 from both sides so now we have $70h = $385.

Now we divide both sides by 70, giving us h = 5.5. Hope it helped!

4 0
3 years ago
Other questions:
  • The LCM of 2 numbers is 60 and 1 of the numbers is 7 less than the other number. What are the numbers?
    11·1 answer
  • The cycle time for trucks hauling concrete to a highway construction site is uniformly distributed over the interval 50 to 70 mi
    14·1 answer
  • Y + 1.8 = 14.7<br>smart people do your thang​
    5·2 answers
  • Which of the following equations have exactly one solution?
    5·1 answer
  • Solve. -2x – 5 &lt; 23
    8·1 answer
  • Which number sentence can be solved using this multiplication fact?
    7·1 answer
  • Help SOS pretty please ​
    6·1 answer
  • Pus
    15·1 answer
  • The Spanish version of Michelle Obama's book,
    14·1 answer
  • 1/3(2x-3/7)+1/6x=4/7
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!