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
Mariulka [41]
2 years ago
15

Please help me please

Mathematics
1 answer:
ella [17]2 years ago
4 0

Answer:

-4??

Step-by-step explanation:

You might be interested in
There are 550 students at Martin Middle School. One bundred and eighty- seven students walk to school. what percent of the stude
Anvisha [2.4K]
For a question like this, all you have to do is remember that a percentage is simply a fraction expressed as a decimal. So, all we have to do is:
\frac{187}{550}, and then multiply our decimal answer by 100 to get the percentage:
\frac{187}{550} = 0.34
0.34 x 100 = 34
Therefore 34% of the students walk to school.
I hope this helped and remember to please try and understand the maths that got the answer, not just writing the answer down :))
4 0
3 years ago
The first three steps in determining the solution set of the system of equations algebraically are shown in the table. y = −x2 +
lianna [129]
You have a system of equations \left \{ {{y = -x^2+2x-9} \atop {y =-6x+6}} \right..

1. Substitude right side of second equation into the left side of the first equation: -6x+6=-x^2+2x-9.

2. Solve this equation:
 x^2-2x+9-6x+6=0, \\ x^2-8x+15=0, \\ D=(-8)^2-4\cdot 1\cdot 15=64-60=4,  \\ \sqrt{D}=2,  \\ x_{1,2}=\dfrac{8\pm 2}{2  } =3,5.

3. Find y:
for x_1=3, y_1=-6\cdot 3+6=-18+6=-12,
for x_2=5, y_2=-6\cdot 5+6=-30+6=-24.

4. The solutions of the system are: (3,-12) and (5,-24).
Answer: Correct choice is A.


7 0
3 years ago
Read 2 more answers
a spinner is divided into four equal sections labled pink blue purple and gold. if the spinner is spun 50 times. how many times
I am Lyosha [343]

Answer:

1/4 of the times

Step-by-step explanation:

because there are 4 sections, that means that there is a 1/4 probability.

4 0
3 years ago
A bag contains n white tiles and five black tiles. The tiles are all equal in shape and sizes. A tile is drawn at random and is
pochemuha

We know that our bag has n white tiles and 5 black tiles.

So, the total number of tiles in the bag is n + 5.

We know that a tile is drawn at random and is replaced, then a second tile is drawn.

a) We want to find the probability that the first tile is white.

Because all the tiles have the same probability of being randomly drawn, the probability of drawing a white tile is just the quotient between the number of white tiles and the total number of tiles in the bag.

P = n/(n + 5)

And for the second draw, we do not have any restrictions, so the probability is the above one.

P = n/(n + 5)

b) Now we want both tiles to be white.

For the first one we already know the probability, which is:

P = n/(n + 5)

And because the tile is replaced, the probability of drawing a white tile again is exactly the same:

Q =n/(n + 5)

The joint probability (the probability of both of these outcomes to happen together) is the product of the individual probabilities.

Probability = P*Q = (n/(n + 5))^2

If you want to read more about probability, you can read:

brainly.com/question/24256398

8 0
3 years ago
Read 45 pages of her book in 2 hours .at that rate how many would she read in 12 hours?
8_murik_8 [283]
2 hours = 45 pages

1 hour = 45 ÷ 2 = 22.5 pages

12 hours = 22.5 x 12 = 270 pages

Answer; 270 pages
5 0
3 years ago
Other questions:
  • Mount St. Helens is 2549.652 meters above sea level what is the height in feet
    7·2 answers
  • The data to the right represent the top speed (in kilometers per hour) Of all the players (except goaltenders) in a certain socc
    8·1 answer
  • How many centimeters are there in 3.5 inches?<br> 1 inch = 2.54 cm
    12·2 answers
  • To convert a distance of 4500 yards to miles, which ratio could you multiply by
    7·2 answers
  • Zoey makes $75 for 3 hours of work. How much money did Zoey make each hour?
    6·2 answers
  • Three integers have a mean of 7, a median of 5 and a range of 14. find the three integers​
    6·1 answer
  • Pls pls pls pls pls pls
    8·1 answer
  • 10. Multi-Step Mrs. Sullivan calculates that she
    9·1 answer
  • For which data set would the median be a better measure of center than the mean?
    11·1 answer
  • Divide 24xy²z³ by 6yz²​
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!