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3 years ago

URGENT PLEASE HELP Definitely need the correct answers as I am failing precalculus

Mathematics

1 answer:

dangina [55]3 years ago

6 0

Answer (first one):

${x|-2\leq x\leq 8}$

Step-by-step explanation:

think of f(x) as y.

$y>-2$

Now find the parts on the x axis that correspond with parts on the y value that are greater than -2.

$x\geq -2 \\x \leq 8$

This would be all of the numbers between -2 and 8 (inclusive).

The reason it is inclusive is because the arrow ends are shaded in.

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What is that answer from numbers 1-4 and what how you got it please thank you

Alex787 [66]

Answer:

1. B and F

2. A and G

3. 0

4. B and D, C and E, D and F, E and G

Step-by-step explanation:

1. Since there are two ways to go from point D, I went in both directions, so there appear to be 2 answers.

2. Same explanation as in problem 1.

3. I counted the same number of points from both A and G until I came upon one point, and then I looked at the number which the letter was above.

4. since A - C is a segment that there are lots of in this problem, there are multiple answers.

Tell me if I'm wrong :)

6 0

2 years ago

Estimate the area

Savatey [412]

Answer:

Step-by-step explanation:

We are given that:

$f(x)\geq g(x)$

For all real numbers and they form a region R that is bounded from x = 1 to x = 7. A table of values is given.

We are directed to use a Right Riemann Sum to find the area between the curves of f and g.

Since f is greater than g for all values of x, to find the approximate area between f and g, we can first find the area of f and then subtract the area of g from f.

Using a Right Riemann Sum, the area of f is approximately:

(We multiply the width between each x-coordinate by the right endpoint)

$\displaystyle \int_1^7f(x)\, dx\approx3(5)+2(2)+1(8)=27$

And the area of g is approximately:

$\displaystyle \int_1^7g(x)\, dx\approx3(1)+2(0)+1(5)=8$

Therefore, the area between them will be:

$A=\displaystyle \int_1^7f(x)\, dx-\int_1^7 g(x)\, dx\approx 27-8=19$

Our answer is B.

3 0

3 years ago

Hey lol:) how are you?

zysi [14]

Good thanks for asking:)

8 0

3 years ago

Read 2 more answers

The center of a circle is at (-7, -2) and the radius is 7. What is the equation of the circle in standard form?

Liono4ka [1.6K]

Answer:

Step-by-step explanation:

The standard form of an equation of a circle:

$(x-h)^2+(y-k)^2=r^2$

(h, k) - center

r - radius

We have:

center (-7, -2) → h = -7 and k = -2

radius r = 7.

Substitute:

$(x-(-7))^2+(y-(-2))^2=7^2\\\\(x+7)^2+(y+2)^2=49$

8 0

3 years ago

To test if x is a good predictor of y in Simple Linear Regression we need to determine whether:

I am Lyosha [343]

Option A is correct.

For testing, if x is a significant predictor of y in simple linear regression, we need to determine if the slope is significantly different from zero.

What is linear regression?

A statistical technique known as linear regression is used to represent the connection between a scalar answer and one or more explanatory factors. When there is just one explanatory variable, simple linear regression is employed; when there are numerous explanatory variables, multiple linear regression is utilized.

Based on the value of another variable, linear regression analysis makes predictions about the value of the first variable. The dependent variable is the one you're trying to forecast. The independent variable is the one you are utilizing to make a prediction about the value of the other variable.

Find more on linear regression: brainly.com/question/25987747

#SPJ4

4 0

1 year ago