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3 years ago

Pls answer this question! I will mark as brainliest!!!

Mathematics

2 answers:

Levart [38]3 years ago

8 0

Answer:

1/8

Step-by-step explanation:

There is a 1/2 probability for each of the three flips to result in the desired outcome. To get 3 desired outcomes in a row, we multiply each of the probabilities together

(1/2)³ = 1/8

marshall27 [118]3 years ago

8 0

Answer: it is D) 2/3

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a quantity of ethanol is cooled from 47.9° C to 12.3°C and releases 3.12 KJ of heat. what is the mass of the ethanol sample?

victus00 [196]

Answer:

35.9 grams

Step-by-step explanation:

We use the formula:

$q=m*C_p*\Delta T$

Where

q is heat released

m is mass

C_p is the constant 2.44

ΔT is change in temperature

We put the info in the formula and solve for m (mass):

$q=m*C_p*\Delta T\\-3.12 = m*2.44(12.3-47.9)\\-3.12*10^3=m*(-86.864)\\m=35.9$

The mass of ethanol is 35.9 grams

8 0

4 years ago

1. If a = -1 , the value of3a + 1 is

erastovalidia [21]

Answer:

$f(a) = 3a + 1 \\ Now,\: a = - 1 \\ f( - 1) = 3( - 1) + 1 \\ f( - 1) = - 3 + 1 \\ \boxed{ f( - 1) = - 2}$

Therefore, <em><u>-2</u></em> is the right answer.

6 0

2 years ago

HELP! I need to pass this test

Eva8 [605]

The answer is D
i plugged in all the equations and the equation for D is the one that works

5 0

3 years ago

What is the solution of

loris [4]

Answer:

x = -1/2

Step-by-step explanation:

1-3x = x+3

Add 3x to each side

1-3x+3x = x+3x+3

1 = 4x+3

Subtract 3 from each side

1-3 = 4x+3-3

-2 = 4x

Divide each side by 4

-2/4 = 4x/4

-1/2 =x

5 0

3 years ago

Read 2 more answers

Please help thank you :)

Bad White [126]

Answer:

ASA

Step-by-step explanation:

Hope it will help

plz brainlists

4 0

3 years ago

Read 2 more answers