2 years ago

A bag contains 28 marbles: 9 black, 14 red, and 5 blue. A marble is drawn from the bag at random.

Mathematics

1 answer:

wlad13 [49]2 years ago

8 0

Answer:

red : 50%

blue : 18%

Step-by-step explanation:

Red : 14:28x100 = 50%

blue : 5:28x100= 17,85%= 18%

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Am I correct here? All answers will be greatly appreciated!

Rufina [12.5K]

Answer:

yes i believe you are correct

Step-by-step explanation:

8 0

3 years ago

Find the equation of the sphere in standard form centered at (−6,10,5) with radius 5.

Dovator [93]

Answer:

The equation of the sphere in standard form is

$x^{2} +y^{2}+z^{2} +12 x-20 y-10 z+136=0$

Step-by-step explanation:

<u>Step 1</u>:-

The equation of the sphere having center and radius is

$(x-h)^{2} +(y-k)^{2} +(z-l)^{2} = r^{2}$

Given centered of the sphere is (-6,10,5) and radius r=5

$(x-(-6))^{2} +(y-10)^{2} +(z-5)^{2} = 5^{2}$

on simplification,we get

$using (a+b)^{2} =a^{2} +2 a b+b^{2}$

$using (a-b)^{2} =a^{2} -2 a b+b^{2}$

simplify , we get

$x^{2} +y^{2}+z^{2} +12 x-20 y-10 z+136=0$

8 0

2 years ago

A water tank in the shape of a right cylinder has a diameter of 14 feet and a height of 18 feet. What is the volume?

Doss [256]

Volume = (pi 3.14)(r^2)(h)

(3.14)(49)(18)

(153.86)(18)

2769.48

7 0

2 years ago

Hi does anyone know this it is important please help me due tonight i will do anything

Inessa [10]

Answer:

$20

Step-by-step explanation:

Total cost of items bought

= $31.21 +$12.75 +$13.25

= $57.21

Remaining cost after paying $40

= $57.21 -$40

= $17.21

Amount borrowed

= change +$17.21

= $2.79 +$17.21

= $20

4 0

2 years ago

Read 2 more answers

Solve the system of equations using substitution. Show your work. <br> y= 2x - 10<br> y= 4x - 8

Semenov [28]

Y=2x-10
Y=4x-8
U substitute it and it turns into 2x-10 =4x-8
U get x=-1
Y=4*(-1)-8
Y=-12
(x,y)= (-1,-12)
If u have a phone u can use photo math or if u don’t there’s a thing called mathpapa

4 0

2 years ago