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
OleMash [197]
3 years ago
6

In a certain class , 7/10 of the students got problem 15 wrong on Friday's math test.

Mathematics
1 answer:
Marat540 [252]3 years ago
7 0

Answer:

whats the question

You might be interested in
Which is the equation of a parabola with a directrix at y = −3 and a focus at (5, 3)?
kramer

Answer:

y = 1/12 (x − 5)²

Step-by-step explanation:

We can solve this graphically without doing calculations.

The y component of the focus is y = 3.  Since this is above the directrix, we know this is an upward facing parabola, so it must have a positive coefficient.  That narrows the possible answers to A and C.

The x component of the focus is x = 5.  Since this is above the vertex, we know the x component of the vertex is also x = 5.

So the answer is A. y = 1/12 (x−5)².

But let's say this wasn't a multiple choice question and we needed to do calculations.  The equation of a parabola is:

y = 1/(4p) (x − h)² + k

where (h, k) is the vertex and p is the distance from the vertex to the focus.

The vertex is halfway between the focus and the directrix.  So p is half the difference of the y components:

p = (3 − (-3)) / 2

p = 3

k, the y component of the vertex, is the average:

k = (3 + (-3)) / 2

k = 0

And h, the x component of the vertex, is the same as the focus:

h = 5

So:

y = 1/(4×3) (x − 5)² + 0

y = 1/12 (x − 5)²

3 0
3 years ago
In a class of all girls, 22 of the 28 students have brown hair. What is the
Verdich [7]

Answer:

\frac{3}{14}

Step-by-step explanation:

Total Students = 28

Brown Hair = 22

NOT Brown Hair = 28 - 22 = 6

The probability of an event is the number of that event divided by total number.

So, let denote probability of without brown hair be  P(NOT BROWN). So, we can say:

P(NOT BROWN) = 6/28

Reducing, we get:

P(NOT BROWN) = 3/14

4 0
3 years ago
Geometry help??????
Kitty [74]
Check the picture below.

7 0
3 years ago
2. (08.05 HC)
4vir4ik [10]

Answer:

option 3

Step-by-step explanation:

not sure if right

8 0
2 years ago
Jose jumped 8 1/3 feet. this mas 2 2/3 feet farther than Lila jumped. how far did Lila jump?
UNO [17]
Lila jumped 5 feet. 
8 1/3-2 2/3=5 feet

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which functions have a vertex with a x-value of 0? Select three options.
    11·2 answers
  • Plz help ill give u brainlist plz help me toofree u are my only hope
    13·1 answer
  • How many right angles are formed when two perpendicular lines intersect?
    6·2 answers
  • HELP ME PLEASE IM IN A PICKEL
    7·1 answer
  • Which unit of measure would be appropriate for the volume of a cube with sides of 2 meters?
    8·2 answers
  • What is the value of x in the equation –2.4x = 8.4?
    11·2 answers
  • Jason’s budget is shown in the circle graph below. His total monthly budget is $3,000. How much does Jason spend on groceries? A
    9·2 answers
  • Solve this linear equation using substitution. (Please show work!)
    6·2 answers
  • Enter the distance, in units, between point A and point B <br><br> (Don’t sent me links pls
    14·1 answer
  • Suppose you like to keep a jar of change on your desk currently at the jar contains the followingWhat is the probability that yo
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!