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3 years ago

What is it? A or B I've been stuck for a while please help

Mathematics

2 answers:

AlladinOne [14]3 years ago

3 0

Answer:

<em>Correct choice: B</em>

Step-by-step explanation:

<u>System of non-linear equations</u>

It's given the following system of equations:

$y=x^2+3x+5$

$y=x+13$

We'll use the substitution method. Substituting y from the first equation into the second equation, we have:

$x^2+3x+5=x+13$

Moving all terms to the left side:

$x^2+3x+5-x-13=0$

Simplifying:

$x^2+2x-8=0$

Factoring:

$(x+4)(x-2)=0$

There are two solutions:

x=-4, x=2

The first solution gives a value for y:

y=-4+13=9

First solution: (-4,9)

The second solution gives a value for y:

y=2+13=15

Second solution: (2,15)

Correct choice: B

Rzqust [24]3 years ago

3 0

I think the correct answer choice is B

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Number line , need help! Merry Christmas!

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Step-by-step explanation:

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2 years ago

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According to the document Current Population Survey, published by the U.S. Census Bureau, 30.4% of U.S. adults 25 years old or o

Marizza181 [45]

Answer:

0.0803 = 8.03% probability that the number who have a high school degree as their highest educational level is exactly 32.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they have a high school degree as their highest educational level, or they do not. The probability of an adult having it is independent of any other adult. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

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

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.

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This is P(X = 32).

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2 years ago

I need help please and fast

patriot [66]

Answer:

20%

Step-by-step explanation:

The reason it is 20% is due to the fact that if you put it in a form showing 250/250 = 100/100 and put another proportional rate underneath it showing 200/250 = x/100, you would have to multiply the numerator of the fraction on the left by the denominator of the fraction on the right to get 20000. Now you divide 250 from 20000 and get x for 80, resulting in 80/100 or 80%. All you have to do now is subtract 100-80, which equals 20, resulting in 20%.

Hope that helps!! It's my first time in answering so, ya. ;D goodluck!

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