3 years ago

» f(x) = (x+2)^2 -1

Mathematics

1 answer:

faltersainse [42]3 years ago

6 0

Answer:

x= 1 thì f(x) = -11ep-by-step explanationábdkjakdkasd :

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I don't know man my teacher is gonna have to deal with me leaving this blank lol.

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2 years ago

Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of tim

DaniilM [7]

Answer:

$t = 0.875$

Step-by-step explanation:

Given

Brand A Brand B

$n_ 1= 12$ $n_2 = 12$

$\bar x_1 = 21.8$ $\bar x_2 = 18.9$

$\sigma_1 = 8.7$ $\sigma_2 = 7.5$

Required

Determine the test statistic (t)

This is calculated as:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

Calculate s using:

$s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}$

The equation becomes:

$s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}$

$s = \sqrt{\frac{1451.34}{22}}$

$s = \sqrt{65.97}$

$s = 8.12$

So:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}$

$t = \frac{21.8 - 18.9}{8.12 * 0.408}}$

$t = \frac{2.9}{3.31296}}$

$t = 0.875$

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3 years ago

The sum of two numbers is 27. One number is 2 times as large as the other. What are the numbers?

mafiozo [28]

X+y=27
x=2y

2y+y=27
y=9

x=27-y
x=27-9=18

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3 years ago

Hank’s pickup can travel 60 miles on 5 gallons of gas. How many gallons will Hank’s pickup need to travel 36 miles

Scorpion4ik [409]

60 / 5 = 12 miles per gallon

36 miles = 12 miles / gal * x gallons

divide by 12

36/12 =x gallons

3 =x

He needs 3 gallons

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3 years ago

Read 2 more answers

Which us the simplified form of <img src="https://tex.z-dn.net/?f=%20%7Bp%7D%5E%7B0%7D%20" id="TexFormula1" title=" {p}^{0}

Mice21 [21]

1
anything with the power of 0=1

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2 years ago

» f(x) = (x+2)^2 -1​

» f(x) = (x+2)^2 -1