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3 years ago

Find the slope of each line. Y=-2x+5

Mathematics

1 answer:

Tomtit [17]3 years ago

8 0

Answer:

m = -2

Step-by-step explanation:

This line is in slope intercept form, y = mx + b, where m is the slope

In this equation, m = -2

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Janice has just bought a new pack of levels in her favorite game, Candy Crush. She knows that she can win a new level on the fir

worty [1.4K]

Answer:

0.0039 = 0.39% probability that she beats all 4 levels on the first try.

Step-by-step explanation:

For each level, there are only two possible outcomes. Either she can win the new level on the first try, or she cannot. The probability of winning a level on the first try is independent of any other level. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

She knows that she can win a new level on the first try 25% of the time.

This means that $p = 0.25$

Janice plays through 4 levels.

This means that $n = 4$

What is the probability that she beats all 4 levels on the first try?

This is P(X = 4). So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 4) = C_{4,4}.(0.25)^{4}.(0.75)^{0} = 0.0039$

0.0039 = 0.39% probability that she beats all 4 levels on the first try.

5 0

3 years ago

Can someone please help me with solving this maths question?

harina [27]

Answer:

CD = 7

Step-by-step explanation:

Given that the triangles are congruent, then corresponding sides are congruent, that is

CD = AB , substitute values

3y + 1 = 15 - 4y ( add 4y to both sides )

7y + 1 = 15 ( subtract 1 from both sides )

7y = 14 ( divide both sides by 7 )

y = 2

Thus

CD = 3y + 1 = 3(2) + 1 = 6 + 1 = 7

3 0

3 years ago

What is the equation in point-slope form of the line passing through (1, 9) and (−1, 11)?

ololo11 [35]

Point slope form:
$y-y_1=m(x-x_1)$

m=slope
(x1,y1)

First we need to find the slope using the slope formula:
$\frac{y_2-y_1}{x_2-x_1} =slope$

Given the two coordinates:
(1, 9) and (−1, 11)

Plug them into the slope formula:
 $\frac{11-9=2}{-1-1=-2} =slope$
Simplify:
$\frac{2}{-2} =-1$

Now we know that:
m=-1 and the (x1,y1) would be (1, 9)

Now we simply plug in the info:
$y-9=-(x-1)$

Final answer: y − 9 = −(x − 1)

7 0

3 years ago

Someone plz help I already know the answer put how can I put the diagram can you guys help me can u put the picture how u did it

Oliga [24]

Answer:

therws this random chart from the internet, I think that's what they want, but not sure