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alukav5142 [94]
2 years ago
12

A bag contains 8 red marbles, 9 yellow marbles, and 7 green marbles. how many additional red marbles must be added to the 24 mar

bles already in the bag so that the probability of randomly drawing a red marble is 3/5
Mathematics
2 answers:
Mice21 [21]2 years ago
8 0

Answer:

16 red marbles

Step-by-step explanation:

8 red

9 yellow

7 green

total = 8 + 9 + 7

p(red) = 8/24 = 1/3

Add r number of red marbles to the total.

8 + r red

9 yellow

7 green

total = 8 + r + 9 + 7 = r + 24

p(red) = (8 + r)/(r + 24) = 3/5

Cross multiply.

40 + 5r = 72 + 3r

2r = 32

r = 16

Answer: 16 red marbles

EleoNora [17]2 years ago
6 0

Answer:

16

Step-by-step explanation:

bag red: 8 + x

yellow:9

green 7/24

3/5 = 8+ x/24+ x

5(8 + x) = 3 (24 + x)

40 + 5x

-40 -3x = 72 + 3x

-40 -3x    -40 - 30

2x/2 = 32/2  so,x = 16

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Predict how many times you will roll a number less than 3 if you roll a standard number
Korvikt [17]

Answer:

about 117 times

Step-by-step explanation:

No. of possible outcomes of a cube: 6

2 out the 6 possible outcomes are less than 3,

and therefore, No. of favorable outcome: 2

P(less than 3)= No. of favorable outcome / No. of possible outcomes

                     =2/6 => 1/3

if you roll a standard number  cube 350 times then,

Prediction= number of rolls x (P(less than 3))

                =350 x 1/3

                ≈117 times.

4 0
3 years ago
33% of what number is 1.45
MAVERICK [17]
33% of 4.3939 is 1.45 

Convert your percentage into a decimal:
\frac{33}{100} = 0.33

Divide both of your decimals:
1.45 \div 0.33 = 4.3939
8 0
3 years ago
Apply the zero matirx:<br> [16 -24] + [ 0 0 ]=[ x y]<br> X=? Y=?
Ainat [17]

Answer:

x = 16

y = -24

Step-by-step explanation:

Recall that the addition of matrices is done when matrices are of the same dimension. In this case, you are in fact adding matrices of the same dimension (dimension 1x2). Recall as well that in the addition of matrices, the elements of each matrix combine only with the element located in the exact same position in the other matrix.

So for this case the first element of the first matrix "16" combines with the first element of the second matrix "0" resulting in an element of value16 + 0 =16 in the new matrix.

Equally, the second element of the first matrix "-24" combines with the second element of the second matrix, resulting in : -24 + 0 = -24.

Therefore, the matrix resultant from this addition is: [16   -24] (same form of the first matrix, which indicates that adding a zero matrix to an existing matrix will not change the first matrix.

5 0
3 years ago
What is an x and y intercept for 14x+y=140
DanielleElmas [232]
140 divided by 14 is 10. So x is 10. And Y is 140. 140 divided by y (1) =140
4 0
3 years ago
You pick a marble and spin the spinner. How many outcomes are possible?
grigory [225]

Answer:

4 i think

Step-by-step explanation:

can you go one question to the left i need help

6 0
3 years ago
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