Please help me.
Prove that if a + b > 100, a, b, or both must be greater than 50

Answer:

Maybe -10

Hope this helps :)

Answer:

5x + 2y

Step-by-step explanation:

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\(f(x) = - {x}^{3} - {x}^{2} + 1\)

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\(f( - 1) = - ({ - 1})^{3} - ({ - 1})^{2} + 1 \\ \)

\(f( - 1) = - ( - 1) - (1) + 1\)

\(f( - 1) = 1 - 1 + 1\)

\(f( - 1) = 2 - 1\)

\(f( - 1) = 1\)

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The correct answer is (( D )) .

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Answer:

square root of a plus 3

Step-by-step explanation:

Answer:

C=10

Step-by-step explanation:

A^2 + B^2 = C^2

A=6

B=8

C=?

A^2=36

B^2=64

C^2=100

Answer:

D.  4.0

Step-by-step explanation:

The annual interest rate is 0.035, οr 3.5% (tο 1 decimal place).

Simple interest is a type οf interest that is calculated as a fixed percentage οf the principal amοunt οver a specific periοd οf time.

Tο find the annual interest rate, we can use the simple interest fοrmula:

I = Prt

Where:

Let's start by finding the interest earned frοm year 5 tο year 6:

I = £1476.20 - £1433.50

I = £42.70

We knοw that Jοseph hasn't added οr remοved any mοney frοm the accοunt, sο the interest earned in each year is the same. Therefοre, the interest earned frοm year 1 tο year 5 is alsο £42.70.

Let's use this infοrmatiοn tο find the annual interest rate:

£42.70 = P × r × 1

£42.70 = P × r

£1433.50 = P + £42.70 × 5

£1433.50 = P + £213.50

P = £1220.00

Nοw we can substitute P intο the equatiοn we derived earlier:

£42.70 = £1220.00 × r

r = £42.70 ÷ £1220.00

r = 0.035

Hence, The annual interest rate is 0.035, οr 3.5% (tο 1 decimal place).

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Answer:

1317 is the additive inverse of x = -1317.

Step-by-step explanation:

Additive inverse of a number which when added to the original number gives zero as the result.

Additive inverse of x = -1317

-1317 + 1317 = 0

1317 is the additive inverse of x = -1317.

Verification of -(-x) = x

L. H. S

-(-x) = -{-(-1317)}

= - 1317

R. H. S

x = -1317

Thus, L.H.S. = R.H.S

-(-x) = x

Verified

Answer:

B

Step-by-step explanation:

edge 2020

Answer:

I thik it is B

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

, , , , ,, , , , , , , , ,sssss

Answer:

y= -5x-2

Step-by-step explanation:

Parallel equations have the same slope, so we know our slope will be -5. To get our y-intercept, we need to plug in our slope. 1 times -5 is -5, so we need to figure out how to get from -5 to -7. We're going to subtract 2, so the y-intercept is -2.

The equation of the line parallel to y=12-5x and passes through the point (1,-7) will be y= -5x-2.

An equation of the line is defined as a linear equation having a degree of one. The equation of the line contains two variables x and y. And the third parameter is the slope of the line which represents the elevation of the line.

The general form of the equation of the line:-

y = mx + c

m = slope

c = y-intercept

Slope = ( y₂ - y₁ ) / ( x₂ - x₁ )

Given that the equation of a line that is parallel to y=12-5x and passes through the point (1,-7).

The slope of the parallel lines is always the same. The slope of the line will be -5.

The y-intercept of the line will be calculated as,

y = mx + c

-7 = -5(1) + c

c = -7 + 5

c = -2

The equation of the line will be written as,

y = mx + c

y = -5x - 2

Therefore, the equation of the line parallel to y=12-5x and passes through the point (1,-7) will be y= -5x-2.

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Answer:

Step-by-step explanation:

perp. 4/3

y - 5 = 4/3(x - 3)

y - 5 = 4/3x - 4

y = 4/3x + 1

According to the combination, The value of the Two blue pebbles is a 3 red pebbles and 1 yellow pebbles.

According to the statement

We have to find that the value of the combination.

So, For this purpose, we know that the

A combination could be a mathematical technique that determines the quantity of possible arrangements in an exceedingly collection of things where the order of the choice doesn't matter.

From the given information:

A red pebble is capable 3 yellow pebbles. A blue pebble is adequate a red pebble and a couple of yellow pebbles. Therefore, the blue pebbles will be:

= 3 yellow pebble + 2 yellow pebbles

= 5 yellow pebbles or 15 red pebbles

And

Two blue pebbles will be:

= 10 yellow pebbles

= 3 red pebbles and 1 yellow pebbles.

So, According to the combination, The value of the Two blue pebbles is a 3 red pebbles and 1 yellow pebbles.

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Question:

A red pebble is equal to 3 yellow pebbles A blue pebble is equal to a red pebble and 2 yellow pebbles. A green pebble is equal to 3 red pebbles

Using the smallest number of pebbles possible and without using blue pebbles, what is the value in pebbles of 2 blue pebbles?

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The GPA of a student who studies for 15 hours a week is 2.935.

What is a GPA?

Grade point average, or GPA, is a conventional method of evaluating academic performance in the United States on a scale of 0 to 4.

How to calculate GPA?

To calculate your GPA, divide the total number of grade points earned by the total number of letter-graded units undertaken.

Here,

We have an equation y = 0.164x + 0.475

put x= 15

we get,

y = 0.164* 15 + 0.475

y = 2.935

Hence, The GPA of a student who studies for 15 hours a week is 2.935

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The sampling method used in the given study is stratified sampling. In this method, the population is divided into homogeneous groups called strata, and a random sample is selected from each stratum to form the final sample. stratified sampling is a useful method for selecting a representative sample from a heterogeneous population when subgroups are well defined.

The given study chooses the sample by dividing the population by voting district and sampling everyone in five districts selected. Therefore, it is an example of stratified sampling where the strata are defined by voting districts. The method is preferred when the population is heterogeneous and it is important to ensure that the sample represents all subgroups of the population.

By dividing the population into strata, the variability within each stratum is reduced, making the sample more representative of the entire population.

In the given study, stratified sampling was used because the researchers wanted to ensure that the sample represents the entire population by selecting individuals from different voting districts. By dividing the population into strata based on voting districts, the researchers were able to reduce the variability within each stratum, making the sample more representative of the entire population.

In addition, the method also ensures that each stratum is represented in the sample, providing a more accurate estimate of the population parameters. Overall, stratified sampling is a useful method for selecting a representative sample from a heterogeneous population when subgroups are well defined.

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From the given information provided, the probability of P(X ≤ 6), P(X˃ 4) and P(|X- 5| ˃ 1) is 0.6915, 0.6915 and 0.3829 respectively.

(i) To find P(X ≤ 6), we need to standardize the value of 6 using the formula:

Z = (X - μ) / σ

where μ = 5 and σ = 2 (since the standard deviation is the square root of the variance, which is 4).

So, we have:

Z = (6 - 5) / 2

Z = 0.5

We can then look up the probability of Z ≤ 0.5 in a standard normal distribution table, or use a calculator to find:

P(X ≤ 6) = P(Z ≤ 0.5) = 0.6915

(ii) To find P(X > 4), we again need to standardize the value of 4:

Z = (4 - 5) / 2

Z = -0.5

Then, we can use the fact that the total area under a normal distribution curve is 1 to find the probability of X being greater than 4:

P(X > 4) = 1 - P(X ≤ 4) = 1 - P(Z ≤ -0.5)

Using a standard normal distribution table:

P(X > 4) = 0.6915

(iii) To find P(|X - 5| > 1), we first need to transform this inequality into a standard normal distribution by standardizing both sides:

|X - 5| > 1

implies:

X - 5 > 1 or

X - 5 < -1

which gives:

X > 6 or X < 4

We can then standardize each inequality separately. For X > 6, we have:

Z = (6 - 5) / 2

Z = 0.5

and for X < 4, we have:

Z = (4 - 5) / 2 = -0.5

Then, using the fact that the total area under a normal distribution curve is 1, we can find the probability of both events occurring:

P(|X - 5| > 1) = P(X > 6 or X < 4) = P(Z > 0.5 or Z < -0.5)

Since the standard normal distribution is symmetric around 0:

P(Z > 0.5 or Z < -0.5) = 2 × P(Z < -0.5)

Using a standard normal distribution table:

P(|X - 5| > 1) = 0.3829

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Answer:

\(\\\sf7x^3 - 2x^2 - 5\)

Step-by-step explanation:

\(\\\sf(6x^3 + 3x^2 - 2) + (x^3 - 5x^2 - 3)\)

Remove parenthesis.

6x^3 + 3x^2 - 2 + x^3 - 5x^2 - 3

Rearrange:

6x^3 + x^3 + 3x^2 - 5x^2 - 2 - 3

Combine like terms to get:

----------------------------------------

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Hope this helps! :)

Answer:

7x³ - 2x² - 5

Step-by-step explanation:

(6x³ + 3x² - 2) + (x³ - 5x² - 3)

Remove the round brackets.

= 6x³ + 3x² - 2 + x³ - 5x² - 3

Put like terms together.

= 6x³ + x³ + 3x² - 5x² - 2 - 3

Do the operations.

= 7x³ - 2x² - 5

____________

hope this helps!

Answer:

1=21

Step-by-step explanation:

for every one you go up you move over 21

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Answer:

answer is c 26 square centi metres

Step-by-step explanation:

(8*4)-(2*3) cm²

(32-6) cm²

27cm²

The probability that the mean lifetime of 25 randomly selected tires of this type will exceed than 42,000 miles is 25.14.

To break this problem, we need to use the standard normal distribution, assuming that the distribution of tire continuances is roughly normal. We can regularize the value of 42,000 using the formula

z = ( x- μ)/ σ

where x is the value of interest( 42,000 long hauls), μ is the mean tire continuance( 40,000 long hauls), and σ is the standard deviation( 3,000 miles). Plugging in the values, we get

z = ( 42,000- 40,000)/ 3,000 = 0.67

Using a standard normal distribution table or calculator, we can find the probability that an aimlessly named tire will last further than 42,000 long miles by looking up the area to the right of z = 0.67 under the standard average wind. This probability is roughly 25.14.

thus, the probability that a tire named arbitrarily from this brand will last more than 42,000 miles is roughly 25.14.

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The correct question is given below-

A particular brand of tires lasts an average of 40,000 miles with a standard deviation of 3,000 miles. What is the probability a tire selected at random lasts more than 42,000 miles?

Answer:

A : 2x\(\sqrt{15}\)    b: 23.2

Step-by-step explanation:

Answer:

Step 2

18 over 8 to a decimal is 2.25

Step-by-step explanation:

Step 1, 20, subtract 16 labeled as

Step 2, 40 labeled as

Step 3, subtract 40, and 0 labeled as Step 4.

Divisor = 8

Divided = 18

Quotient = 2.25

2.25

8 √18

- 16

2 0

- 16

4 0

- 40

0

The first error is at step 2

18 over 8 to a decimal is 2.25

See the attached image for better understanding

Answer:

step 2

Step-by-step explanation:

Based on the information provided, it is not possible to determine the likely correlation between the two variables. The presence or absence of a linear relationship between the variables is also unclear.

To determine the correlation and relationship between two variables, it is necessary to collect data and perform statistical analysis. It is important to note that correlation does not necessarily imply causation and that other factors may also influence the relationship between variables.
To determine if the correlation between the two given variables is likely to be positive or negative, or if they are not likely to display a linear relationship, follow these steps:
1. Analyze the data: Look for trends in the data points to see if they are moving in a specific direction.
2. Positive correlation: If both variables increase together, it indicates a positive correlation.
3. Negative correlation: If one variable increases while the other decreases, it indicates a negative correlation.
4. No linear relationship: If there is no consistent pattern in the way the variables change, they are not likely to display a linear relationship.
By examining the data for the given variables and applying these steps, you can determine the type of correlation or if a linear relationship exists between them.

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well, so the book is 180 and is discounted by 30%, how much will that be?

\(\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{30\% of 180}}{\left( \cfrac{30}{100} \right)180}\implies 54\qquad \qquad \underset{\textit{discounted price}}{\stackrel{180-54}{126}}\)

so from that discounted price, a tax of 4%

\(\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{4\% of 126}}{\left( \cfrac{4}{100} \right)126}\implies 5.04\qquad \qquad \underset{\textit{final price}}{\stackrel{126+5.04}{131.04}}\)

The equation is x=4  that has an undefined slope and passes through the point (4, -4).

A point's coordinates have been provided to us (4,7). The task is to determine the equation of the line that passes through the specified location and has an ambiguous slope.

We are aware that a vertical line's slope is ill-defined. As a result, the slope of the vertical line across point (4,7) will be ill-defined.

When the x-coordinates of every point on the line are the same, the slope of the line cannot be determined.

Therefore, X=4 is  the best option because the line will have the identical x-coordinates for all of the y-coordinates

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Answer:

hey

sin 30 = x/8

1/2=x/8

x=8/2=4