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3 years ago

Plssss help (ZOOM IN TO SEE FULL PIC)

Mathematics

1 answer:

MA_775_DIABLO [31]3 years ago

5 0

Answer:

d and e

Step-by-step explanation:

IV must have a pos x value and a negative y value

we can eliminate everything except d e & f

f is wrong bc it has a positive 3 value

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Need help again asap please! Find the sum of the first 30 terms of the sequence below an=3n+2

hoa [83]

$S_{30}$ = 1455

generate a few terms of the sequence using $a_{n}$ = 3n + 2

$a_{1}$ = ( 3 × 1) + 2 = 5

$a_{2}$ = (3 × 2) + 2 = 8

$a_{3}$ = (3 × 3 ) + 2 = 11

$a_{4}$ = (3 × 4 ) + 2 = 14

$a_{5}$ = ( 3 × 5 ) + 2 = 17

the terms are 5, 8, 11, 14, 17

these are the terms of an arithmetic sequence

sum to n terms is calculated using $S_{n}$ = $\frac{n}{2}$ [ 2a + (n-1)d]

where a is the first term and d the common difference

d = 8 - 5 = 11 - 8 = 14 - 11 = 3 and $a_{1}$ = 5

$S_{30}$ = $\frac{30}{2}$ [( 2 × 5) + (29 × 3) ]

= 15( 10 + 87) = 15 × 97 = 1455

3 0

3 years ago

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Help asap! 14 points given

STALIN [3.7K]

In graphing or? To answer this you’re going to need to be more specific

8 0

3 years ago

Write the equation of the line perpendicular to y=2/3 x−12 that passes through the point (4, -1) in slope-intercept form.

xenn [34]

Answer:

Step-by-step explanation:

perp. -3/2

y + 1 = -3/2(x - 4)

y + 1 = -3/2x + 6

y = -3/2x + 5

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3 years ago

In a recent poll, 370 people were asked if they liked dogs, and 7% said they did. Find the margin of error of this poll, at the

Dennis_Churaev [7]

Answer:

$ME=1.64\sqrt{\frac{0.07(1-0.07)}{370}}=0.0218$

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$p$ represent the real population proportion of interest

$\hat p=0.07$ represent the estimated proportion for the sample

n=370 is the sample size required (variable of interest)

$z$ represent the critical value for the margin of error

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.10$ and $\alpha/2 =0.05$ . And the critical value would be given by: