MATHEMATICS COLLEGE

What is a simplified expression for (x + y)-(x + y)?

Answers

Answer 1

Answer:

Answer:

0

Step-by-step explanation:

(x + y)-(x + y)

Answer 2

Answer:

Answer:

0

Step-by-step explanation:

What is a simplified expression for (x + y)-(x + y)?

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Find the general solution of the following equation. Express the solution explicitly as a function of the independent variable. x^2 dw/dx = √ w(2x+5)
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Bruuuuuuuuu + bruh - brooo x π to the pawer of 420 = what please answer this seriously with evidence and reasoning

need help asap please help me if i get rong i will cry

Answers

Answer:

= bruv

Step-by-step explanation:

you spelt power wrong too

Given the function f(x) =-2x^2 + 4x -7 find f(-4)

Answers

Correct the answer is -55

Monty can use the number line to find an equivalent fraction with a denominator greater than 6

Answers

Yes, Monty can use the number line to find an equivalent fraction with a denominator greater than 6.

For Example,

Consider $(5)/(7)$

The equivalent fraction of $(5)/(7)$ is $(25)/(35)$ .

So, yes you can represent $(5)/(7)$ on a number line by putting 6 lines between 0 and 1 and Can Represent $(25)/(35)$ by putting 34 lines between 0 and 1.

There is no effect of denominator to find equivalent fraction of any rational number, whether the denominator is greater than 6 or less than 6, but denominator should not be equal to Zero.

We can find equivalent fraction of any rational number , the denominator of that rational number should not be equal to Zero.

Is this math? What's the question ?

Which postulate or theorem would you use to prove these two triangles congruent?

Answers

Answer:

SSS

Step-by-step explanation

youre given only side conguencys, so you cant prove the angles are conguent

) At a certain college, students are allowed to choose between online and in-person learning. 70% of the students choose online learning and 30% choose to come to campus for in-person instruction. Assume that the probability that a person studying online will contract the coronavirus is .02 and the probability that a person attending class in-person contracts the virus is .35 . (a) What is the probability that a person attending this college (either online or in-person) will contract the virus

Answers

Answer:

Probability = 0.119

Step-by-step explanation:

P (Coronavirus) = P(Person online & corona) or P(Person offline & corona)

(0.70 x 0.02) + (0.30 x 0.35)

0.014 + 0.105

0.119

In the past, 21% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An independent research firm has been charged with conducting a sample survey to obtain more current information. (a) What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.09? Use a 95% confidence level. (Round your answer up to the nearest whole number.)

Answers

Answer:

A sample size of 79 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{(\pi(1-\pi))/(n)}$

In which

z is the zscore that has a pvalue of $1 - (\alpha)/(2)$ .

For this problem, we have that:

$\pi = 0.21$

The margin of error is:

$M = z\sqrt{(\pi(1-\pi))/(n)}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - (0.05)/(2) = 0.975$ , so $Z = 1.96$ .

What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.09?

A sample size of n is needed.

n is found when M = 0.09. So

$M = z\sqrt{(\pi(1-\pi))/(n)}$

$0.09 = 1.96\sqrt{(0.21*0.79)/(n)}$

$0.09√(n) = 1.96√(0.21*0.79)$

$√(n) = (1.96√(0.21*0.79))/(0.09)$

$(√(n))^(2) = ((1.96√(0.21*0.79))/(0.09))^(2)$

$n = 78.68$

Rounding up to the nearest whole number.

A sample size of 79 is needed.

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