3 years ago

Which expression is equivalent to 2 (-3x + 5)?

Mathematics

1 answer:

Pavel [41]3 years ago

3 0

the answer is B -6b + 10

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A coin is flipped. if a heads is flipped, then the coin is flipped 4 more times and the number of heads flipped is noted; otherw

belka [17]

The first flip can obviously return only H or T.

Suppose the coin lands on H. This means that every following string is possible (and thus part of the sample space)

$x_1,\ x_2,\ x_3\ x_4,\quad x_i \in \{H,\ T\}$

So, there are 16 such strings, because every flip has two possible outcomes.

Suppose now the coin lands on T. Like before, we add to the sample space the following strings:

$x_1,\ x_2,\quad x_i \in \{H,\ T\}$

And thus there are 4 such strings, because we have two choices for each of the two flips.

So, the sample space has 20 outcomes:

H - HHHH

H - HHHT

H - HHTH

H - HHTT

H - HTHH

H - HTHT

H - HTTH

H - HTTT

H - THHH

H - THHT

H - THTH

H - THTT

H - TTHH

H - TTHT

H - TTTH

H - TTTT

T - HH

T - HT

T - TH

T - TT

7 0

3 years ago

Devika buys 30 notebooks and 15 pens. Each book costs Rs40 and that of each pen is Rs15. Find out the total amount she spent.

Rudiy27

Answer:

Rs 1425

Step-by-step explanation:

=(30×40) + (15×15)

=1425

5 0

1 year ago

HAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAALLLLLLP

Eva8 [605]

It is -16
-1/8c=2
2/-1/8=2 X-8/1=-16

7 0

3 years ago

You roll a number cube twice. What is the probability of rolling a 2 first and then rolling an odd number?

Margaret [11]

1/12

The possibility of rolling a 2 is 1/6, since there is one option out of 6.

The possibility of rolling an odd number is 3/6, or 1/2, since half of the numbers are odd.

Multiply these two together by multiplying the numerators together and multiplying the denominators together.

(1 * 1) / (6 * 2)

1 / (6 * 2)

1/12

6 0

3 years ago

A patio at the front of the school is a quadrilateral with 4 right angles and 4 congruent sides. What type of quadrilateral is i

pashok25 [27]

I think it is a square because a square has 4 equal sides and four right angles I hope this helped u!

3 0

3 years ago

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