please help me :)))))))))

Step-by-step explanation:

3

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Answer:

25.92

Step-by-step explanation:

Answer:

(x+a) (x+b)=x(x+b)+a(x+b)=x²+bx+ax+ab=x²+x(a+b)+ab

Step-by-step explanation:

solution

here, given,

(x+a) (x+b)

= x(x+b) +a(x+b)

=x^2+xb+ax+ab ans

hope this helps u..

Answer:

b. Meaningful because the sample size exceeds 30 and the central limit theorem ensures normality of the sampling distribution of the sample mean.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex]

In this question:

Sample of 100, which means that the central limit theorem applies, no matter the distribution of the population. So the correct answer is given by option b.

Answer: 6 in 2

Step-by-step explanation:

Answer:

[tex]Rate = 3[/tex]

Step-by-step explanation:

Given

The attached graph

Required

Average rate of change over [tex]1 \le x \le 3[/tex]

This is calculated as:

[tex]Rate = \frac{f(b) - f(a)}{b - a}[/tex]

[tex][a,b] = [1,3][/tex]

[tex][f(a),f(b)] = [-2.4][/tex]

So, we have:

[tex]Rate = \frac{4 - (-2)}{3 - 1}[/tex]

[tex]Rate = \frac{6}{2}[/tex]

[tex]Rate = 3[/tex]

Answer:

Working on it now

Step-by-step explanation:

Answer: It's probodly  3000

Step-by-step explanation:

Answer:

4. D

6. A

Step-by-step explanation:

Answer:

5.5

Step-by-step explanation:

Answer:

M+R=90 (Given)

(5x+10)+55=90 (given)

5x+10=90-55

5x+10=35

5x=35-10

5x=25

5x÷5=25÷5 (divide both sides by 5)

x=5

Answer: There is a pie symbol on the calculator or if there is no symbol put 3.14

Step-by-step explanation:

Answer:

3.14

Step-by-step explanation:

taught this in math class hope this helps

Answer:

Step-by-step explanation:

4 to 1

Answer:

4 to 1

Step-by-step explanation:

Boston has 211 days of sunshine and Colorado Springs has 253 days of sunshine.

Two or more expressions with an Equal sign is called as Equation.

Let us consider x to represent the number of days of sunshine in Boston.

We know that Colorado Springs has 1.2 times as many days of sunshine as Boston.

The total number of days of sunshine between the two cities is 464.

Set up an equation to solve x.

x + 1.2x = 464

Simplifying and solving for x, we get:

2.2x = 464

x = 211. So Boston has 211 days of sunshine.

The number of days of sunshine in Colorado Springs, we can multiply by 1.2:

1.2x = 1.2(211) = 253.2

So Colorado Springs has 253 days of sunshine.

Therefore, Boston has 211 days of sunshine and Colorado Springs has 253 days of sunshine.

To learn more on Equation:

https://brainly.com/question/10413253

#SPJ2

Answer:

D.The slope of the relationship between first floor square footage and price is more steep for homes near the beach than elsewhere in Tampa

Step-by-step explanation:

We can see from the output that was run in this regression that this variable has a positive coefficient. So the result is going to be interpreted to show an increase. Therefore d is the answer as it shows that these homes which are closer to the beach are steeper compared to those that are in other areas of tampa. It's necessary to always look out for the signs of the coefficient when interpreting a regression result

Answer:

The believe answerrrr is 11

Answer:

11

Step-by-step explanation:

3 - (-8)

first add the minuses together to make a + sign

then you just add up

3 + 8 = 11

Answer:

1537 voters should be polled.

Step-by-step explanation:

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

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

95% confidence level

So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].

20% of voters are in favor of certain legislation.

This means that [tex]\pi = 0.2[/tex]

How many voters should be polled in order that the probability is at least .95 that fA(n) differs from 0.20 by less than 0.02

This is n for which M = 0.02. So

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.02 = 1.96\sqrt{\frac{0.2*0.8}{n}}[/tex]

[tex]0.02\sqrt{n} = 1.96\sqrt{0.2*0.98}[/tex]

[tex]\sqrt{n} = \frac{1.96\sqrt{0.2*0.98}}{0.02}[/tex]

[tex](\sqrt{n})^2 = (\frac{1.96\sqrt{0.2*0.98}}{0.02})^2[/tex]

[tex]n = 1536.6[/tex]

Rounding up

1537 voters should be polled.

Answer:

a) Trials are independent, and there is a fixed number of trials, which means that the binomial probability distribution can be used.

b) 0.000015 = 0.0015% probability that exactly one of the 12 seniors disapproves daily pot smoking

Step-by-step explanation:

Binomial probability distribution

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

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

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

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

And p is the probability of X happening.

a)

For each senior, there are only two possible outcomes. Either they disapprove daily pot smoking, or they do not. The seniors are selected at random, which means that the probability of one disapproving daily pot smoking is independent of other seniors, that is, the trials are independent. There is also a fixed number of trials.

b)

70% disapprove of daily pot smoking, according to a report in Parade, which means that [tex]p = 0.7[/tex]

12 seniors means that [tex]n = 12[/tex]

The probability is P(X = 1).

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 1) = C_{12,1}.(0.7)^{1}.(0.3)^{11} = 0.000015[/tex]

0.000015 = 0.0015% probability that exactly one of the 12 seniors disapproves daily pot smoking

Answer:

47.1

Step-by-step explanation:

tan 61 = FD/24

FD = 43 3

cos 19 = 43.3/FE

FE = 43.3/cos 19 = 47.1

Answer:

Step-by-step explanation:

%change=100(final-initial)/(initial)

final=20-12=8 and initial=20 so

%change=100(8-20)/20

%change=100(-12)/20

%change=-1200/20

%change= -60%

Answer:

16 units²

Step-by-step explanation:

Area of the right triangle = ½ × base × height

base = 8

height = 4

Substitute

Area = ½ × 8 × 4

Area = ½ × 32

Area = 16 units²

Answer:

y=92

z=57

TWO METHODS:

1) z=180-31-92 (small triangle)

2) z=180-60-63 (big triangle)

Step-by-step explanation:

63+29+x=180

x=180-92

x=88

y=180-88

y=92

z=180-31-92

z=57

Answer:

4 1/2

Step-by-step explanation:

.

Answer:

4 1/2

Step-by-step explanation:

9/2 as a mixed fraction.

= 9 ÷ 2

= 4 which leaves a remainder of 1

▪Take the 4 as the whole number, take the remainder 1 and place it over the denominator which is 2

You then get your answer.

4 1/2

Answer:

2 2/3 - 1 3/4 = 11/12

Step-by-step explanation:

You could convert them both to improper fractions then you would make them have common denominators so the least common denominator for the would be 12 so you would multiply them and then you would subtract them to get your answer of 11/12.

2 2/3 = 8/3 times 4 = 32/12

1 3/4 = 7/4 times 3 = 21/12

32/12 - 21/12 = 11/12

Answer:

Step-by-step explanation:

average of x-coordinates = (7+1)/2 = 4

average of y-coordinates = (-3-1)/2 = -2

center of circle: (4,-2)

radius = distance between (1,-1) and (4,-2)

= √((4-1)²+(-2-(-1))²)

= √10

equation of circle:

(x-4)² + (y+2)² = 10