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Westkost [7]
2 years ago
12

A bag contains 8 gray glass marbles, 2 gray metal marbles, 4 black glass marbles, and 6 black metal marbles. If one marble is dr

awn at random, what is the probability that it is glass, given that it is one of the black marbles?
A. 1/5
B. 1/3
C. 2/5
D. 1/2
Mathematics
1 answer:
Vera_Pavlovna [14]2 years ago
4 0

Answer:

1/5

Step-by-step explanation:

Total marbles = 20

Black marbles = 10

(10/20) x (4/10)

= (1/2) x (2/5)

= 2/10

= 1/5

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The line 2x + 3y = -6 intersects the x axis at (a,0) and the y axis at (0,b) what is a + b ?
USPshnik [31]
2x + 3y = -6 (Subtract 2x from both sides)
3y = -2x - 6 (Divide both sides by 3 to isolate x) which will give you y = -2/3x - 2 and this graphed would cross the x-axis at (-3,0) and the y-axis at (0, -2). So a + b = -5
3 0
3 years ago
a vehicle factory manufactures cars. The unit cost C (the cost in dollars to make each car) depends on the number of cars made.
timofeeve [1]

Answer:

8,567

Step-by-step explanation:

Given the cost function expressed as C(x)=0.7x^2- 462 x + 84,797

To get the minimum vaklue of the function, we need to get the value of x first.

At minimum value, x = -b/2a

From the equation, a = 0.7 and b = -462

x = -(-462)/2(0.7)

x = 462/1.4

x = 330

To get the minimum cost function, we will substitute x = 330 into the function C(x)

C(x)=0.7x^2- 462 x + 84,797

C(330)=0.7(330)^2- 462 (330)+ 84,797

C(330)= 76230- 152460+ 84,797

C(330) = 8,567

Hence the minimum unit cost is 8,567

7 0
3 years ago
The value of 1 tenth is less the value of 3 tenth
Lesechka [4]

Answer:

True, 3 tenths is closer to one whole

Step-by-step explanation:

                              ↓                                                                 ↓

8 0
3 years ago
I need help 0.259 written out as a fraction or mixed number?
oksano4ka [1.4K]

1) To write 0.259 as a fraction let's firstly rewrite as

\frac{259}{1000}

2) Count the digits the dot has gone to the left. Each digit to the left means divided by ten. Like this:

3) Since it starts with a zero then it can't be a Mixed number. So it is an improper fraction. No further simplification could be done.

4 0
1 year ago
Pak arya memiliki kebun yang berbentuk belah ketupat dengan keliling 68cm persegi dan panjang salah satu diagonalnya 16 cm.jika
nikdorinn [45]
Sisi
68/4
17 m
panjang diag. Lainnya
akar 17^2 - 8^
15 mx 2
30 m

luas
1/2 x 30 x 16
240 m2

uang
yang diterima
200.000 x 240
<span> 48 juta rupiah</span>
7 0
3 years ago
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