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
MAXImum [283]
3 years ago
15

This one's not too difficult, giving Brainliest and 40 points to whoever has the best answer

Mathematics
2 answers:
Julli [10]3 years ago
7 0

Answer:

2  and 31 are prime

15 and 8 are composite

1 is neither prime nor composite

Step-by-step explanation:

Prime numbers are only divisible by one and  themselves

15 = 5*3  composite

2 = prime

8 = 4*2  composite

31 = prime

1 neither prime nor composite

13= prime

hjlf3 years ago
3 0

15,2,31,13

Answer:

Solution given:a number that is divisible only by itself and 1 (e.g. 2, 3, 5, 7, 11).

now

all prime numbers are:

15,2,31,13

You might be interested in
PLS ANSWER ASAP PLEAAAAAAASE I HAVE LIKE 10 MINUTES
Ganezh [65]
D is the correct answer
5 0
3 years ago
Read 2 more answers
Hiii friends plzzzzz talk me i am alone​
nikdorinn [45]

Answer:

Okay what do you want to talk about ?

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Can anyone explain how to find surface area? BRAINLIEST FOR BEST EXPLAINTION!
Wittaler [7]
Surface Area of a Cube = 6 a 2

(a is the length of the side of each edge of the cube)

In words, the surface area of a cube is the area of the six squares that cover it. The area of one of them is a*a, or a 2 . Since these are all the same, you can multiply one of them by six, so the surface area of a cube is 6 times one of the sides squared.



Surface Area of a Rectangular Prism = 2ab + 2bc + 2ac
(a, b, and c are the lengths of the 3 sides)

In words, the surface area of a rectangular prism is the area of the six rectangles that cover it. But we don't have to figure out all six because we know that the top and bottom are the same, the front and back are the same, and the left and right sides are the same.

The area of the top and bottom (side lengths a and c) = a*c. Since there are two of them, you get 2ac. The front and back have side lengths of b and c. The area of one of them is b*c, and there are two of them, so the surface area of those two is 2bc. The left and right side have side lengths of a and b, so the surface area of one of them is a*b. Again, there are two of them, so their combined surface area is 2ab.


Surface Area of Any Prism

(b is the shape of the ends)

Surface Area = Lateral area + Area of two ends

(Lateral area) = (perimeter of shape b) * L

Surface Area = (perimeter of shape b) * L+ 2*(Area of shape b)


Surface Area of a Sphere = 4 pi r 2

(r is radius of circle)


Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h

(h is the height of the cylinder, r is the radius of the top)

Surface Area = Areas of top and bottom +Area of the side

Surface Area = 2(Area of top) + (perimeter of top)* height

Surface Area = 2(pi r 2) + (2 pi r)* h

In words, the easiest way is to think of a can. The surface area is the areas of all the parts needed to cover the can. That's the top, the bottom, and the paper label that wraps around the middle.

You can find the area of the top (or the bottom). That's the formula for area of a circle (pi r2). Since there is both a top and a bottom, that gets multiplied by two.

The side is like the label of the can. If you peel it off and lay it flat it will be a rectangle. The area of a rectangle is the product of the two sides. One side is the height of the can, the other side is the perimeter of the circle, since the label wraps once around the can. So the area of the rectangle is (2 pi r)* h.

Add those two parts together and you have the formula for the surface area of a cylinder.

Surface Area = 2(pi r 2) + (2 pi r)* h


6 0
3 years ago
I REALLY NEED HELP I WILL PUT CROWN IF YOU ANSWER CORRECTLY
faust18 [17]

Answer:

I think it would be \frac{36}{4} -6

Step-by-step explanation:

stomp me if its wrong <3

\frac{36}{4} -6 = 9-6 = 3

 <em> hopefully this helps ~</em>

5 0
1 year ago
Read 2 more answers
A car uses 1 1/8 gallons of gas to go 13 1/2<br> miles. What is the rate of miles per gallon?
IceJOKER [234]

Answer:

1 1/8 ga / 13.5 mi = .0833 ga / mi

1 / .0833 ga/mi = 12 mi / ga

or .0833 ga/mi * 13.5 mi = 1.25 ga

7 0
3 years ago
Other questions:
  • There are two square roots of 25. what is there only one sneer for the radius of the button.
    7·2 answers
  • John's monthly salary is 7,000. If John deposits 0.75 of his paycheck into a savings account. How much money does he put in his
    15·1 answer
  • Please help! ill give brainliest.
    8·1 answer
  • Ratios and rates are ways to relate different quantities. For example, for every 1 car, there are 4 tires. This is a ratio. What
    14·1 answer
  • What is the right answer for this question?
    8·1 answer
  • Math help guys please
    15·1 answer
  • (x2 + 3x – 4) + (2x3 - 2x + 5)​
    13·2 answers
  • you are out with friends. half of you want to go bowling and the other half want to go to a movie. how will you make a fair deci
    8·1 answer
  • Chicago has an elevation of 991 feet above sea level. The elevation of Detriot is -923
    5·1 answer
  • A cylinder has a diameter of 10 inches and a height four times its radius. What is its volume?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!