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3 years ago

In x-5=9, the correct way to isolate the variable is to

Mathematics

1 answer:

den301095 [7]3 years ago

8 0

Answer: x=14

Step-by-step explanation:

Add 5 to both sides to get the x alone and get your answer.

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2a^2-5a=3 solve by factoring

Amiraneli [1.4K]

Answer:

a=−1/2, 3

3Step-by-step explanation:

6 0

2 years ago

A coin, having probability p of landing heads, is continually flipped until at least one head and one tail have been flipped. (a

Natali [406]

Answer:

(a)

The probability that you stop at the fifth flip would be

$p^4 (1-p) + (1-p)^4 p$

(b)

The expected numbers of flips needed would be

$\sum\limits_{n=1}^{\infty} n p(1-p)^{n-1} = 1/p$

Therefore, suppose that $p = 0.5$ , then the expected number of flips needed would be 1/0.5 = 2.

Step-by-step explanation:

(a)

Case 1

Imagine that you throw your coin and you get only heads, then you would stop when you get the first tail. So the probability that you stop at the fifth flip would be

$p^4 (1-p)$

Case 2

Imagine that you throw your coin and you get only tails, then you would stop when you get the first head. So the probability that you stop at the fifth flip would be

$(1-p)^4p$

Therefore the probability that you stop at the fifth flip would be

$p^4 (1-p) + (1-p)^4 p$

(b)

The expected numbers of flips needed would be

$\sum\limits_{n=1}^{\infty} n p(1-p)^{n-1} = 1/p$

Therefore, suppose that $p = 0.5$ , then the expected number of flips needed would be 1/0.5 = 2.

7 0

2 years ago

Find a, for the sequence 0.5, 3.5, 24.5,<br> 171.5.

antiseptic1488 [7]

The numbers are being multiplied by 7

.5 • 7 = 3.5
3.5 • 7 = 24.5
24.5 • 7 = 171.5
etc

8 0

2 years ago

No step by step answers or links

inysia [295]

Answer:

1. k = 15

2. d = 20

3. n = 3

6 0

2 years ago

Pls help I am suffering

Fed [463]

Answer:

line l: x = -1

line m: x = 6

line n: y = 4

line p: y = -2

Step-by-step explanation:

All of these lines are parallel to either to y or x axis, so the slope is either zero or undefined. This means all you have to do is set x or y equal to the x intercept or y intercept. For lines that go vertically, they always have the same x coordinate and any y coordinate you put in will make a point that is on the line. The same thing with the horizontal lines, except they all have the same y coordinate and any x coordinate will make a point that is on that line.

All you have to do is set x or y, depending on which way the line is going, equal to the point is goes through on the axis it travels through, no need to worry about slope or y = mx + b.

6 0

2 years ago

Read 2 more answers