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3 years ago

(-8y^2+6y-1)+(-8y^2+8y+1)-(-3y^2+9y-9)

Mathematics

2 answers:

taurus [48]3 years ago

3 0

The answer of the given equation is $-13y^{2} -11y+7$

Step-by-step explanation:

The given equation can be written as,

$(-8y^{2}+6y-1) +(-8y^{2}+8y+1)-(-3y^{2}+9y-9)$

= $-8y^{2} +6y-1-8y^{2}-8y -1+3y^{2}-9y+9$

[Taking same powered variables together we get,]

= $(-8y^{2}-8y^{2}+3y^{2}) +(6y-8y-9y)-1-1+9$

= $-13y^{2} -11y+7$

Here the answer.

iogann1982 [59]3 years ago

3 0

‍♀️‍♀️‍♀️‍♀️!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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1.Graph the equation y = 6x -18:

RSB [31]

Answer:

1. Given the equation: y =6x-18 ......[1]

The intercepts of a line are the points where the line intercepts or crosses the horizontal and vertical axes.

(A)

Horizontal intercept(x) states that the point where the line crosses the x-axis and at this point y=0

Put y=0 in equation [1]

$0=6x-18$ or

$6x=18$

Ordered pair of horizontal intercept(x) = (3,0)

(B)

Vertical intercept(y) states that the point where the line crosses the y-axis and at this point x=0.

Put x=0 in equation [1]

$y=6\cdot 0-18$ or

$y=-18$

Ordered pair of vertical intercept(y) = (0,-18)

You can also see the graph of the function y =6x-18 as shown in Figure-1.

Graph the equation y+2x =4

to find the horizontal intercept and vertical intercept we follow the same process as done in 1

(A)

Horizontal intercept (x) = 2

Ordered pair = (2,0)

(B)

Vertical intercept (y) = 4

Ordered pair = (0,4)

Also, you can see these in the graph as shown in the Figure-2

Given: The slope(m) of a line is $\frac{3}{4}$

Two lines are parallel if their slopes are equal and they have different y - intercepts.

(A).

The slope of a line parallel to it is, $\frac{3}{4}$

(B)

The slope of the original line is $\frac{3}{4}$ .

A line perpendicular to another line has a slope that is the negative reciprocal of the slope of the other line.

Therefore, slope of a line perpendicular to it is; $-\frac{1}{m} = -\frac{4}{3}$

The graph of the equation y =4x+5 as shown in figure 3

The x-intercept of this line is $\frac{-5}{4}$ = -1.25

And the y-intercept of this line is y =5.

Graph of the equation y = -3 represents the line as shown in figure 4.

Solve the equation:

6y-18x = -18

6y = 18x-18

Divide by 6 to both sides of an equation ; we get

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8 0

3 years ago

Solve the system of equations.

erica [24]

Answer:

you are so smart :)))

Step-by-step explanation:

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3 years ago

Andrea bought 1 2/5 pounds of avocados at $4.20 per pound and 2 1/

guapka [62]

Answer:

$14.43¢

Step-by-step explanation:

We are given; $1\frac{2}{5}$ pounds, 1 pound = $4.20 and $2\frac{1}{4}$ pounds,1 pound = $3.80 that Andrea bought.

Now we need to find her total cost. To do that, we must first find the cost of the avocados. To do so, let us set up a graph. But before that is done, convert $1\frac{2}{5}$ to a decimal. It is 1.4. Now we can set up a graph.

<u>Avocados</u>

$\frac{4.2}{1}=\frac{x}{1.4}$

Switch sides

$\frac{x}{1.4}=\frac{4.2}{1}$

Apply rule: $\frac{a}{1}=a$

$\frac{x}{1.4}=4.2$

Multiply both sides by 1.4

$\frac{1.4x}{1.4}=4.2\cdot \:1.4$

Simplify

$x=5.88$

So, her cost for avocados is $5.88¢

Now we must first find the cost of the avocados. To do so, let us set up a graph. But before that is done, convert $2\frac{1}{4}$ to a decimal. It is 2.25. Now we can set up a graph.

<u>Asparagus</u>

$\frac{3.8}{1}=\frac{x}{2.25}$

Switch sides

$\frac{x}{2.25}=\frac{3.8}{1}$

Apply rule : $\frac{a}{1}=a$

$\frac{x}{2.25}=3.8$

Multiply both sides by 2.25

$\frac{2.25x}{2.25}=3.8\cdot \:2.25$

Simplify

$x=8.55$

So, her cost for asparagus is $8.55¢

<u>Total cost</u>

Now that we have found out how much both of the fruits Andrea bought costs, we need to sum it up (meaning add it) to find the total cost:

$5.88¢ + 8.55¢ =

5.88 + 8.55 = 14.43

Therefore, Andrea's total cost of the fruits is $14.43¢

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3 years ago

Find the product of 2(5.9) mentally using the distributive property.

VARVARA [1.3K]

2(5.9) is 11.8

Hopefully i is right I did this in my head.

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3 years ago

A distribution of probabilities for random outcomes of a bivariate or dichotomous random variable is called a Group of answer ch

slega [8]

A distribution of probabilities for random outcomes of bivariate or dichotomous random variables is called (A) binomial probability distribution.

<h3>What is a binomial probability distribution?</h3>

The binomial distribution with parameters n and p in probability theory and statistics is the discrete probability distribution of the number of successes in a succession of n separate experiments, each asking a yes-no question and each with its own Boolean-valued outcome: success or failure.

The binomial distribution is widely used to describe the number of successes in a sample of size n selected from a population of size N with replacement.
If the sampling is done without replacement, the draws are not independent, and the resulting distribution is hypergeometric rather than binomial.
Binomial probability distribution refers to a distribution of probabilities for random outcomes of bivariate or dichotomous random variables.

As the description itself says, binomial probability distribution refers to a distribution of probabilities for random outcomes of bivariate or dichotomous random variables.

Therefore, a distribution of probabilities for random outcomes of bivariate or dichotomous random variables is called (A) binomial probability distribution.

Know more about binomial probability distribution here:

brainly.com/question/9325204

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Complete question:

A distribution of probabilities for random outcomes of bivariate or dichotomous random variables is called a ______.

Group of answer choices

(A) binomial probability distribution

(B) distribution of expected values

(D) mathematical expectation

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2 years ago