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3 years ago

I'm giving brainliest to best answer

Mathematics

1 answer:

Natali5045456 [20]3 years ago

3 0

Answer:

2) 62.5 wpm

3) 12.7 miles per gallon

4)18 commercials per hour

5) 22.9 ounces per dollar

Step-by-step explanation:

2) 500 words / 8 minutes = 62.5 words per 1 minute

3) 216 miles / 17 gallons = 12.7 miles per gallon

4) 36 commercials / 2 hours = 18 commercials per hour

5) 64 oz / $2.79 = 22.9 oz per $1

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You are an assistant director of the alumni association at a local university. You attend a presentation given by the university

NNADVOKAT [17]

Answer:

(0.102, -0.062)

Step-by-step explanation:

sample size in 2018 = n1 = 216

sample size in 2017 = n2 = 200

number of people who went for another degree in 2018 = x1 = 54

number of people who went for another degree in 2017 = x2 = 46

p1 = x1/n1 = 0.25

p2 = x2/n2 = 0.23

At 95% confidence level, z critical = 1.96

now we have to solve for the confidence interval =

$0.25 -0.23 ± 1.96*\sqrt{((1 - 0.25) * 0.25)/216 + ((1 - 0.23) *0.23/200}$

= 0.02 ± 1.96 * 0.042

= 0.02 + 0.082 = 0.102

= 0.02 - 0.082 = -0.062

There is 95% confidence that there is a difference that lies between - 0.062 and 0.102 on the proportion of students who continued their education in the years, 2017 and 2018.

There is no significant difference between the two.

5 0

3 years ago

WHO IS SUPER GOOD AT MATH? I NEED HELP REALLY FAST! BRAINLIEST ANSWER AWARDED TO CORRECT ANSWER WITH AT LEAST A LITTLE EXPLANATI

erastova [34]

The answer to your question is D

7 0

3 years ago

I mainly need help on 2 please thanks for the first one though

sleet_krkn [62]

2) 1 4/5

3) 2

4) 4 1/3

5) 3 4/8 or 3 1/2

6) 6 2/8

7 0

3 years ago

For the given polynomials find the sum of the squares of the roots. P(x)=x^3-x^2-18x+k

slega [8]

$\text{Given that,}\\\\P(x) = x^3 -x^2 -18x+k\\\\\text{If the roots are}~ \alpha, ~ \beta,~\text{and}~ \gamma, ~ \text{then},\\\\\alpha +\beta+\gamma= -\dfrac{(-1)}1 = 1\\\\\alpha \beta +\beta \gamma + \gamma \alpha= -\dfrac{18}1 = -18\\ \\\text{Now, sum of the squares of the roots,}\\\\\alpha^2 + \beta^2 + \gamma^2 = ( \alpha + \beta + \gamma)^2 -2(\alpha \beta + \gamma \beta + \gamma \alpha)\\ \\~~~~~~~~~~~~~~~~~~=1^2 - 2(-18)\\\\~~~~~~~~~~~~~~~~~~=1+36\\\\~~~~~~~~~~~~~~~~~~=37$

6 0

2 years ago

What is the equation of a line that has a y-intercept of 4 and an x-intercept of -2?

Furkat [3]

Answer:

y = 2x + 4

Step-by-step explanation:

Two points on this line are (-2, 0) and (0, 4). Going from the first to the second, x increases by 2 (this is the 'run') and y increases by 4 ('rise').

Thus, the slope of this line is m = rise / run = 4/2 = 2

Using the slope-intercept formula, we get y = mx + b = 2x + b

Let x = -2 and y = 0 to find b: 0 = 2(-2) + b, so b = 4, and the desired equation is then:

y = 2x + 4

6 0

3 years ago