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3 years ago

HELP simple question

Mathematics

2 answers:

lawyer [7]3 years ago

5 0

Answer:

I think it’s step 2 where she distributed the exponents incorrectly but she got it right so since no explanation is really needed then I guess it’s step 2.

step 1 where she divided 5 on both sides. Step 3 is also correct since the answer is 0. so step 2 had the mistake.

Butoxors [25]3 years ago

5 0

I’m gonna guess step 1 (x+7)^2=49 because the math doesn’t make sense on that

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What is 160 rounded to the nearest hundred

VashaNatasha [74]

Answer:

♡ madeline here ♡

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Step-by-step explanation:

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2 years ago

Emilio drew a line that is modeled by the equation y-4=3(x-2) what is the slope of the line?

Maurinko [17]

Since this line is written in point slope form, we have y-y1=m(x-x1) so our m is our slope. Here, m=3 so our slope here is 3

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3 years ago

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.

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3 years ago

The midpoint M of CD has coordinates (6, 6). Point D has coordinates (10, 4). Find the coordinates of point C.

Firdavs [7]

Answer:

(2,8)

Step-by-step explanation:

The midpoint of a line segment with endpoints (a,b) and (c,d) is

((a+c)/2 , (b+d)/2) .

So one endpoint is given and the midpoint is given, we are asked to find the other midpoint.

(10+c)/2=6 (4+d)/2=6

10+c=12 4+d=12

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(2,8) is the other endpoint

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3 years ago

Find the zeros of the function. Write the smaller solution first, and the larger solution second. f(x)=(x+8)^2−1

BartSMP [9]

Answer:

zeroes: x = -9 and x = -7

Step-by-step explanation:

f(x)=(x+8)^2−1

A "zero" refers to when the y-value on the graph is zero.

0 = (x+8)^2 - 1

1 = (x+8)^2

+ or - 1 = x+8

so break them apart into two equations

x+8 = 1 OR x+8 = -1

x = -7 OR x = -9

You can plug both back in to check that the equation works!

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4 years ago