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Elanso [62]
2 years ago
13

URGENT PLS HELP! bag contains 25 white marbles and 10 black marbles you pick one marble at random what is the probability that y

ou pick a black marble
Mathematics
1 answer:
Diano4ka-milaya [45]2 years ago
8 0

Answer:

The answer is 28.6

Step-by-step explanation:

10/35 you get it in a percentage

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Manuel até 1/3 crackers. His brother ate 1/4 crackers. There are 5 crackers left. How many crackers were there from he beginning
mrs_skeptik [129]
50 crackers hope this helps
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3 years ago
WILL GIVE BRANLIEST! FINAL QUESTION
blondinia [14]

Answer:A

Step-by-step explanation: In exponents,

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8 0
3 years ago
What is the sum of the measures of the measures of the exterior angles of this triangle?
mylen [45]

Answer:

The sum of the exterior angles is 360 degrees.

7 0
3 years ago
An oblique triangular pyramid has a base area
lubasha [3.4K]

The height of the oblique triangular pyramid is 18 units if the base area of 21 square units and a volume of 126 cubic units.

<h3>What is volume?</h3>

It is defined as a three-dimensional space enclosed by an object or thing.

We know the volume of an oblique triangular pyramid is given by:

\rm V = \dfrac{1}{3}b\times h

Where b is the area of the base and h is the height of the pyramid.

We have b = 21 square units  and V =  126 cubic units.

\rm 126 = \dfrac{1}{3}\times21\times h

h = 18 units

Thus, the height of the oblique triangular pyramid is 18 units if the base area of 21 square units and a volume of 126 cubic units.

Learn more about the volume here:

brainly.com/question/16788902

#SPJ1

5 0
2 years ago
Given that x and y are positive integers, solve the equation x² - 4y² = 13​
zvonat [6]
<h3>Answer:  x = 7 and y = 3</h3>

=====================================================

Explanation:

Apply the difference of squares rule

x² - 4y² = 13

x² - (2y)² = 13

(x - 2y)(x + 2y) = 13

Since x and y are positive integers, this means x-2y and x+2y are both integers as well.

The value 13 is prime. Its only factors are 1 and 13

Since the above equation shows 13 factoring into x-2y and x+2y, then we have two cases:

  • A) x-2y = 1 and x+2y = 13
  • B) x-2y = 13 and x+2y = 1

----------------

Let's consider case A

We have this system of equations

\begin{cases}x-2y = 1\\x+2y = 13\end{cases}

Add the equations straight down

  • x+x becomes 2x
  • -2y+2y becomes 0y = 0 which goes away
  • 1+13 becomes 14

Therefore we have 2x = 14 solve to x = 7

From here, plug this into either equation to solve for y

x-2y = 1

7 - 2y = 1

-2y = 1-7

-2y = -6

y = -6/(-2)

y = 3

You should get the same result if you used x+2y = 13

----------------

Since we've found that x = 7 and y = 3, notice how case B is not possible

Example:  x-2y = 13 becomes 7-2(3) = 13 which is false.

Also, x+2y = 1 would turn into 7+2(3) = 1 which is also false.

-----------------

Let's check those x and y values in the original equation

x² - 4y² = 13

7² - 4*(3)² = 13

49 - 4(9) = 13

49 - 36 = 13

13 = 13

The answer is confirmed.

4 0
2 years ago
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