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2 years ago

Which of the following is an arithmetic sequence?

1 answer:

6 0

$-8~~,~~\stackrel{-8+2}{-6}~~,~~\stackrel{-6+2}{-4}~~,~~\stackrel{-4+2}{-2}\qquad \begin{cases} a_1=-8\\ d = +2 \end{cases}$

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What are the steps to solve an inequality like: |n + 8| > 3 ??????

SCORPION-xisa [38]

$|n+8|>3\iff n+8>3\ \vee\ n+8-5\ \vee\ n$

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4 years ago

a highway is to be built between two towns, one of which lies 48.6 km south and 60.3 km west of the othe

Katena32 [7]

Answer:

whats the rest of the question or what's the available answers

8 0

1 year ago

Solve for x. x + 14 5x - 74 x = [?]

otez555 [7]

Answer:

$\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}$

x + 14 = 5x - 74 (corresponding angles are equal to each other)

$x + 14 = 5x - 74 \\ 14 + 74 = 5x - x \\ 88 = 4x \\ \frac{88}{4} = x \\ 22 = x$

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3 years ago

Read 2 more answers

X+2y=4 2x-2y=5 what is the answer

Tom [10]

x + 2y = 4

2x - 2y = 5

Adding both the equations:

x + 2y + 2x - 2y = 9

3x = 9

x = 3

y = 4-x /2 = 1/2

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3 years ago

The principal at Riverside High School would like to estimate the mean length of time each day that it takes all the buses to ar

Lilit [14]

Answer:

C) 11

Step-by-step explanation:

1) Previous concepts

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".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that $z_{\alpha/2}=1.64$