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3 years ago

What's the slope of y = 2x - 5?

Mathematics

2 answers:

nlexa [21]3 years ago

7 0

Answer:

Step-by-step explanation:

Law Incorporation [45]3 years ago

3 0

Answer:-5

Step-by-step explanation:

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What is the equation of the graph below?

Harlamova29_29 [7]

Hey there! :)

Answer:

$y= cos (x+ \pi })$

Step-by-step explanation:

Normally, in the parent function y = cos x, when X = π, Y = -1. However, in this graph, when X = 0π, Y = -1.

Therefore, there has been a horizontal shift of π to the left. The new equation would be:

$y= cos (x+ \pi })$

6 0

3 years ago

Find the area of the curve y= f(x) = x between x = 5 and x = 10

Tems11 [23]

Answer:

the area of the curve y= f(x) = x between x = 5 and x = 10

$A=\frac{75}{2}$

Step-by-step explanation:

Finding the area of the curve y = f(x) = x between x = 5 and x = 10

Using the Area formula

$A=\int _a^b\:f\left(x\right)dx$

As the area of curve lies between x = 5 and x = 10

a = 5, b = 10

so the integral expression becomes

$A=\int _5^{10}xdx$

$\mathrm{Apply\:the\:Power\:Rule}:\quad \int x^adx=\frac{x^{a+1}}{a+1},\:\quad \:a\ne -1$

$A=\left[\frac{x^{1+1}}{1+1}\right]^{10}_5$

$=\left[\frac{x^2}{2}\right]^{10}_5$

$=\frac{1}{2}\left[10^2-5^2\right]$

$=\frac{1}{2}\cdot \:75$

$=\frac{75}{2}$

Therefore, area of the curve y= f(x) = x between x = 5 and x = 10

$A=\frac{75}{2}$

4 0

3 years ago

WELP DESPERATE A LOT OF POINTS AND BRAINLIEST

Helen [10]

Answer:

28%

Step-by-step explanation:

There are 50 males in the survey. The first step is to put 14 over 50 then multiply both by 2.

14/50 14x2=28 50x2=100

28/100

That means the percent of boys who chose invisibility is 28%

6 0

3 years ago

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HEEP! I WILL GEV YOU BRANLEST! Wats 1+1? I ma so confsed

Allisa [31]

Answer:

2 or wrong answer 55

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

A random survey of 1000 students nationwide showed a mean ACT score of 21.1. Ohio was not used. A survey of 500 randomly selecte

vodka [1.7K]

Answer:

We conclude that the mean Ohio score is below the national average.

Step-by-step explanation:

We are given that a random survey of 1000 students nationwide showed a mean ACT score of 21.1. Ohio was not used.

A survey of 500 randomly selected Ohio scores showed a mean of 20.8. The population standard deviation is 3.

Let $\mu$ = mean Ohio scores.

So, Null Hypothesis, $H_0$ : $\mu$ $\geq$ 21.1 {means that the mean Ohio score is above or equal the national average}

Alternate Hypothesis, $H_A$ : $\mu$ < 21.1 {means that the mean Ohio score is below the national average}

The test statistics that would be used here One-sample z test statistics as we know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n}}}$ ~ N(0,1)

where, $\bar X$ = sample mean Ohio score = 20.8

$\sigma$ = population standard deviation = 3

n = sample of Ohio = 500

So, test statistics = $\frac{20.8-21.1}{\frac{3}{\sqrt{500}}}$

= -2.24

The value of z test statistics is -2.24.

Now, at 0.1 significance level the z table gives critical value of -1.2816 for left-tailed test. Since our test statistics is less than the critical values of z as -2.24 < 1.2816, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which we reject our null hypothesis.

Therefore, we conclude that the mean Ohio score is below the national average.

4 0

4 years ago