-6x + 5xy - 9y - 3x + 7 =....need help again!!sorry​

The distance between the cars changes by 60.42mph.

Distance is a measurement of how far apart two objects or locations are. Distance in physics or common language can refer to a physical length or an assumption based on other factors. |AB| is a symbol that can be used to represent the distance between two points. "Distance from A to B" and "Distance from B to A" are frequently used interchangeably. A distance function or metric is a technique to describe what it means for elements of some space to be "close to" or "far away" from each other in mathematics. It is a generalization of the idea of physical distance. Through dimensions like time, space, and isolation, an object may be psychologically distanced from itself.

Calculations:

\(d=\sqrt{80^{2}+50^{2} } \\\)

d=94.34

1st car -- 40mph/hr

2nd car-- 50 mph/hr

The positions of cars at 4pm

Distance travelled by 1st car = 80m

Distance travelled by 2nd car = 50m

\(d^{2}=a^{2} +b^{2}\)

2d.dd/dt=2a(da/dt) +2b(db/dt) =d(dd/dt) =a(da/dt)+b(db/dt)=94.34(dd/dt)=50*50+80*40

dd/dt=(2500+3200)(94.34)  =60.419

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Answer:

1200*6=7200

9.50*6=57

7200 + 57= 7257

7257d

When a study sample is representative of the target population, it allows for the results to be generalizable, meaning they can be applied to the broader population.

This is an important aspect of research, as it ensures the study's findings are relevant and useful beyond the specific sample studied.

When a study sample shows representativeness, it means that the sample accurately reflects the characteristics of the target population.

In this case, the study is most likely generalizable, with results that can be applied to the target population.
To achieve representativeness, researchers often use random sampling techniques, which help minimize the potential for sampling bias.

Sampling bias occurs when certain groups within the target population are over- or under-represented in the sample, which can lead to inaccurate conclusions.

In contrast, if a study used strict inclusion and exclusion criteria to limit the sample size or relied on specific inclusion criteria, it could result in a sample that is not representative of the target population.

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Answer:

A = Rs 48,000

B = Rs 24,000

C = R2 8,000

Step-by-step explanation:

To solve this problem, create and solve a system of linear equations using the given information.

From the given information:

Therefore, the system of linear equations is:

\(\begin{cases}A=2B\\B=3C\\A+B+C=80000\end{cases}\)

Substitute the second equation into the first to create and equation for A in terms of C:

\(\begin{aligned}A &= 2B\\&=2(3C)\\&=6C\end{aligned}\)

Substitute this and the second equation into the third equation and solve for C:

\(\begin{aligned}A+B+C&=80000\\6C+3C+C&=80000\\10C&=80000\\C&=8000\end{aligned}\)

Now that we have found the monthly income of person C, substitute this value into the expressions for A and B to calculate the monthly incomes of persons A and B:

\(\begin{aligned}A &=6C\\&=6(8000)\\&=48000\end{aligned}\)

\(\begin{aligned}B &=3C\\&=3(8000)\\&=24000\end{aligned}\)

Therefore, the monthly income of each person is:

Answer:

Rounded percent error = 38% So, Michael's percent error was 38%.

Step-by-step explanation:

Rounded percent error = 38% So, Michael's percent error was 38%.

Answer:

The answer for your question is A) 1/3

Step-by-step explanation:

as both 21 are like terms you can just add up 3 & 4 and do division

(would appreciate it if you could mark me the brainliest:))

\( \frac{3}{21} + \frac{4}{21} \)

the simplest form.

\( \frac{3 + 4}{21} \)

\( = \frac{7}{21} \)

\( = \frac{1}{3} \)

hence, the correct answer is option A.

He Can buy 2 shirts and stay under budget

Inequality can be viewed from different perspectives, all of which are related. Most common metric is Income Inequality, which refers to the extent to which income is evenly distributed within a population. Related concepts are lifetime Inequality (inequality in incomes for an individual over his or her lifetime), Inequality of Wealth (distribution of wealth across households or individuals at a moment in time), and Inequality of Opportunity (impact on income of circumstances over which individuals have no control, such as family socioeconomic status, gender, or ethnic background).

49 + 19.59x ≤ 100

x ≤ ( 100-49)/19.59

x ≤ 2.603

He Can buy 2 shirts and stay under budget.

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Answer:

20,000 milligrams

Step-by-step explanation:

20 grams x 1000= 20,000 milligrams

To get grams to milligrams, you multiply by 1,000

The root word milli- means 1,000

The compound interest is given by the equation CI = Amount - Principal , where A = P ( 1 + r/n )ⁿᵇ

Compound interest is interest based on the initial principle plus all prior periods' accumulated interest. The power of compound interest is the ability to generate "interest on interest." Interest can be added at any time, from continuously to daily to annually.

The formula for calculating Compound Interest is

A = P ( 1 + r/n )ⁿᵇ

where A = Final Amount

P = Principal

r = rate of interest

n = number of times interest is applied

b = number of time periods elapsed

Given data ,

Let the principal amount be represented as P

Let the time period be represented as t = b

Let the number of periods the interest is applied be n

And , the rate of interest be r

Substituting the values in the equation , we get

The amount after b years is calculated by the formula

A = P ( 1 + r/n )ⁿᵇ

On simplifying the equation , we get the amount after b years

And , the compound interest is given by

CI = A - P , where A is the amount and P is the principal

Hence , the compound interest is solved

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The number of push-ups did sara did during gym class if for every 7 push-ups Dulce can do, Sara can do 6 is 24 push ups.

Number of push ups Dulce can do : number of push ups Sara can do

Let

number of push ups Sara does = x

7 : 6 = 28 : x

7/6 = 28/x

cross product

7 × x = 28 × 6

7x = 168

divide both sides by 7

x = 168/7

x = 24

Therefore, Sara does 24 push ups during the gym class.

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Answer:

\(y=3x+5\)

Step-by-step explanation:

The problem is asking for slope-intercept form, luckily, they gave us both of those things.

Slope-intercept form: \(y=mx+b\), where \(m=\) slope and \(b=\) y-intercept.

So,

\(y=3x+5\)

Hope this helps!

Answer:

221

Step-by-step explanation:

211321

Truth values (a) False                                                                                                           (b) False                                                                                                           (c) False                                                                                                            (d) True

Here is the translation of these quantifications into English and determine its truth value. a) ∀x∈R (x^2 = -1)
Translation: For all x belonging to the set of real numbers, x squared equals -1.
Truth value: False. No real number squared can equal a negative value.
b) ∃x∈Z (x^2 = 2)
Translation: There exists an x belonging to the set of integers such that x squared equals 2.
Truth value: False. No integer squared can equal 2.
c) ∀x∈Z (x^2 > 0)
Translation: For all x belonging to the set of integers, x squared is greater than 0.
Truth value: False. When x equals 0 (x=0), x squared equals 0, which is not greater than 0.
d) ∃x∈R (x^2 = x)
Translation: There exists an x belonging to the set of real numbers such that x squared equals x.
Truth value: True. There are two real numbers that satisfy this condition: x=0 and x=1.

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The correct answer is 'Maura earns $12 per hour for babysitting her 3 nieces'

Here, we want to select which of the options show a multiplicative relationship.

The correct answer is G

Maura earns $12 per hour for babysitting her 3 nieces

Why this shows a multiplicative relationship is that given the number of hours which she babysat, we can find the amount she earned

Hence there is a multiplicative relationship between the amount of money she earns and the number of hours for which she has worked

Answer:

3.5

Step-by-step explanation:

Answer:

7664025600

Step-by-step explanation:

I basically just multiplied first then added the sums. Also you can use a calculator to make sure ur answer is right.

Answer:

y= -2x+3....…........

If Alice tests positive and the experts are right on the population prevalence, the probability that Alice has the disease is 0.489.

In the given question, a new disease has been observed, and experts believe that 1% of the population have it.

A test is developed that has 95% true positive rate and 1% false positive rate.

From the given data,

Let E be the event that a patient has a disease and F be the event that a patient has tested positive.

Then according to Bayes' theorem we have,

P(E/F) = P(E)P(E/F)}/(P(E)P(E/F)+P(E')P(F/E')

P(E/F) = (1*95)/(1*95)*(99*1)

P(E/F) = 95/194

P(E/F) = 0.489 (approx.)

Hence, the probability that Alice has the disease 0.489.

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The Faith had met her goal for the week, her mean would have increased, but we can't say how the median and mode would have changed without more information.

If Faith had met her goal for the week, the mean, median, and mode would all be affected differently. Let's assume that Faith's goal for the week was to read 100 pages.The mean, also known as the average, is calculated by adding up all the values and dividing by the number of values. If Faith only read 60% of her goal, that means she read 60 pages out of 100. To find the mean, we would add up all the pages she read for the week and divide by 7 (the number of days in a week).

So, her mean for the week would be (60/7) = 8.57 pages per day. If she had met her goal, her mean for the week would have been 14.28 pages per day ((100/7) = 14.28). Therefore, her mean would have increased if she met her goal.
The median is the middle value when all the values are put in order. In this case, we don't know how many pages Faith read each day, so we can't calculate the median without that information.
The mode is the value that appears most frequently. If Faith read 60 pages for the week, there is only one value, so the mode would be 60. If she had met her goal, there would be more than one value, so the mode would be different. Again, we would need to know how many pages she read each day to calculate the mode.

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The solution is,  U={ keys on a keyboard}, could describe U .

A set is the mathematical model for a collection of different things; a set contains elements or members, which can be mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets.

Here, we have,

S is a subset of U,

so all of the elements of S must be also elements of U

If U was {letters}, 4, 9, ? would not belong there

If U was {numbers }, x, y, ? would not belong to U

If U was {punctuation marks }, 4, 9, x, y would not be in U

all the elements of S are in U={ keys on a keyboard}

Answer:  U={ keys on a keyboard}, could describe U.

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Step-by-step explanation:

3. is A x^2 -6x -7

4. is C 7x^2 - 4x + 2

7 B

8 A

9 D

Answer:

\(question3. \: x {}^{2} - 6x - 7 \\question4. \: 7x {}^{2} - 4 x + 2 \\ question7. \: x {}^{2} - 6x + 5 \\ question8.\: 7x {}^{2} - 7x - 8 \\ question9.\: - 2x + 9\)

Answer:

0.9358

Step-by-step explanation:

Triangles

Looking at the image, It is safe to say there are two similar triangles having similar base and sides there.

Triangle BAC has the same base as Triangle DAC

Therefore, the vertices of the angle B is equivalent to the vertice of angle D

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Answer:

123°

Step-by-step explanation:

Since, measure of minor arc is equal to the measure of its corresponding central angle.

Measure of central angle = 123°

So,? = 123°

Answer:

The horizontal value in a pair of coordinates: how far along the point is. The X Coordinate is always written first in an ordered pair of coordinates (x,y), such as (12,5). In this example, the value "12" is the X Coordinate. Also called "Abscissa" See: Coordinates.

Step-by-step explanation:

The value of x in the matrix is 1.

Option D is the correct answer.

Matrix is a form of writing items in rows and columns.

We have,

From the matrix addition, we can write as,

-2x + 3 = x

Now,

Combining the like terms.

-2x - x + 3 = 0

-3x = -3

Dividing 3 into both sides.

-x = -1

x = 1

Thus,

The value of x in the matrix is 1.

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Answer:a=3

Step-by-step explanation:

Answer:

a = 3b + 13

Step-by-step explanation:

a - 7 = 3 (b+2)

a - 7 = 3b + 6

a = 3b + 13

Answer:

n=-7/2 I hate asking for things but can i have brainliest im trying to rank up.

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

n/7−12=5n+5

1/7n+−12=5n+5

1/7n−12=5n+5

Step 2: Subtract 5n from both sides.

1/7n−12−5n=5n+5−5n

-34/7n−12=5

Step 3: Add 12 to both sides.

-34/7n−12+12=5+12

-34/7n=17

Step 4: Multiply both sides by 7/(-34).

(7/-34)*(-34/7n)=(7/34)*(17)

The sentence that translates the linear equation 5 · x + y = 2 is: The sum of five times x plus y equals 2.

Herein we find the mathematical definition of a linear equation of the form a · x + b · y = c, where a, b, c are real coefficients. This equation must be translated into human language, that is, a complete sentence in order to respond this question. Therefore, the expression can be translated as follows:

5 · x + y = 2: The sum of five times x plus y equals 2.

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