Ask question

Ask question

All categories

3 years ago

12

initially, there were the same number of blue marbles and red marbles in a bag. John took out 5 blue marbles and then there were

twice as many red marbles as blue marbles in the bag. how many red marbles are there in the bag

1 answer:

tester [92]3 years ago

6 0

10 red marbles

Multiply the # of blue marbles by 2 (since there was TWICE as many red marbles), and you have your answer (above)

You might be interested in

Consider the linear system of equations. y = –x + 9 y = 0.5x – 6 If the solution is (a,–1), what is a? a =

Nadusha1986 [10]

Answer:

The value of a is 10.

Step-by-step explanation:

We are given with the following pair of the linear system of equations below;

$y = -x+9$ and $y = 0.5x-6$ .

Also, the solution is given as (a, -1).

To find the value of 'a', we have to substitute the solution in the equation because it is stated that (a, -1) is the solution of the given two equations.

So, the x coordinate value of the solution is a and the y coordinate value of the solution is (-1).

First, taking the equation;

$y = -x+9$

Put the value of x = a and y = -1;

(-1) = -(a) + 9

a = 9 + 1 = 10

Now, taking the second equation;

$y = 0.5x-6$

Put the value of x = a and y = -1;

$(-1) = 0.5(a)-6$

0.5a = 6 - 1

0.5a = 5

$a=\frac{5}{0.5}$

a = 10

Since we get the value of a = 10 from the equations, so the value of a is 10.

8 0

2 years ago

A sphere is just enclosed inside a right circular cylinder. If the volume of the sphere is 140 cm3, find the volume of the gap b

alexgriva [62]

-----------------------------------------------------------
Find Radius :
-----------------------------------------------------------
$\text {Volume of a sphere =} \dfrac{4}{3} \pi r^3$

$\dfrac{4}{3} \pi r^3 = 140$

$\pi r^3 = 140 \times \dfrac{3}{4}$

$\pi r^3 = 105$

$r^3 = \dfrac{105}{ \pi}$

$r = 3.22 \ cm$

-----------------------------------------------------------
Find volume of the cylinder :
-----------------------------------------------------------
$\text {Volume of the cylinder = } \pi r^2h$

$\text {Volume of the cylinder = } \pi ((3.22)^2(3.22 \times 2)$

$\text {Volume of the cylinder = } 209.77 \ cm^3$

-----------------------------------------------------------
Find volume of the gap :
-----------------------------------------------------------
$\text {Volume of gap = } 209.77 - 140$

$\text {Volume of gap = } 69.77 \ cm^3$

-----------------------------------------------------------
$\bf \text {Answer : } 69.77 \cm^3$
-----------------------------------------------------------

6 0

3 years ago

4.5/y = 12.5/4 PLEASE HELP!!! SOS

garik1379 [7]

Answer:

y = 1.44

Step-by-step explanation:

What are you aiming to do here? Please share all instructions with each problem.

If you want to solve 4.5/y = 12.5/4 for y: Multiply both sides by 4y:

18 = 12.5y. Then y = 1.44

7 0

2 years ago

The output is the cube of the input

Murrr4er [49]

<span>1.)the output is half of the input.
2.)the output is one more than twice the input.
3.)the output is the cube if the input.
4.)the output is six times the input.</span>

6 0

2 years ago

Two plus ten times eight

alexdok [17]

Two plus ten times eight
(2+10)*8 = 96

3 0

3 years ago