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strojnjashka [21]

3 years ago

7

There is a bag filled with 3 blue, 2 red and 4 green marbles. A marble is taken at random from the bag, the colour is noted and

then it is not replaced. Another marble is taken at random. What is the probability of getting 2 the same colour?

1 answer:

german3 years ago

7 0

i hope i have been useful buddy.
good luck ♥️♥️♥️♥️♥️.

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You have 40 grams of a radioactive kind of tellurium. If it's half life is 9 hours, how much will be left after 18 hours

AlexFokin [52]

Answer:

10 grams

Step-by-step explanation:

7 0

3 years ago

Select all the statements that describe the expression 5+2x.

sergejj [24]

Answer:

B, E

Step-by-step explanation:

Answer A is wrong: 5 + 2 + x

Answer C is wrong: 5 + x + x

Answer D is wrong: 5 + x*x

F is wrong, because a product is the result of multiplying.

6 0

3 years ago

Read 2 more answers

Find the value of x.

son4ous [18]

Answer:

18.0

Step-by-step explanation:

==>Given:

Triangle with sides, 16, 30, and x, and a measure of an angle corresponding to x = 30°

==>Required:

Value of x to the nearest tenth

==>Solution:

Using the Cosine rule: c² = a² + b² - 2abcos(C)

Let c = x,

a = 16

b = 30

C = 30°

Thus,

c² = 16² + 30² - 2*16*30*cos 30°

c² = 256 + 900 - 960 * 0.8660

c² = 1,156 - 831.36

c² = 324.64

c = √324.64

c = 18.017769

x ≈ 18.0 (rounded to nearest tenth)

8 0

4 years ago

Find the coordinates of the midpoint of the segment whose endpoints are R(9, 3) and S(-1, -9).

amm1812

Answer:

$(4, -3 )$

General Formulas and Concepts:

<u>Pre-Algebra I</u>

Order of Operations: BPEMDAS

<u>Algebra I</u>

Midpoint Formula: $(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2} )$

Step-by-step explanation:

<u>Step 1: Define</u>

R (9, 3)

S (-1, -9)

<u>Step 2: Find midpoint</u>

Substitute: $(\frac{9-1}{2}, \frac{3-9}{2} )$
Subtract: $(\frac{8}{2}, \frac{-6}{2} )$
Divide: $(4, -3 )$

4 0

3 years ago

Which statements are true about the ordered pair (2, 3) and the system of equations?

kifflom [539]

The answer is f when 2,3 is put in for the x and y then 18 should come out 3×2=6
4×3=12 12+6=18

7 0

4 years ago