Question
Which best describes when you should use multiplication to solve a system of linear equations by elimination?

Answer:

The slope is up 2, left 1. The slope is negative, meaning the graphgoes from left to right.

Step-by-step explanation:

area of square = s×s

9×9

81cm²

hope it helps...!!!

Answer:

81 cm^2

Step-by-step explanation:

A square is a 2d shape with side lengths all the same.

To find the area, all you need is one side length, which is 9cm in this case.

Then you just square the number (9 x 9) to get 81 cm^2 (centimetre squared).

Answer:

3,000. You take 15,000 and multiply by .4 to get how much she spent on rent (6,000). They you subtract the rent money from her total pay to get her money that she spent on living expenses, clothes and entertainment in total (9,000). Since she spent her money in six parts (3+2+1), you divide 9,000 by 6 to get 1,500 to get each part. Since for entertainment she has two parts you multiply 1,500 by 2 to get 3,000.

Answer:

d

Step-by-step explanation:

Answer:

I think that it is zy.

Step-by-step explanation:

I believe this because x angle is 100 degrees while y angle is 50 degrees. Z is still unknown, but since y is the smallest number of the 2 angles we do know, I think that it is safe to asume that zy is the shortest side.

\(D\)

\(3y=2x-18 \iff 2x-3y = 18\)

Answer:

D

Step-by-step explanation:

y = \(\frac{2}{3}\) x - 6 ( multiply through by 3 to clear the fraction )

3y = 2x - 18 ( subtract 2x from both sides )

- 2x + 3y = - 18 ( multiply through by - 1 )

2x - 3y = 18 → D

Answer:

5

Step-by-step explanation:

Because, you have to divide the $20 by the $100

Step-by-step explanation:

1) 165⁰

2) 180⁰

Note:FOR initial temperature check the temperature at t=0

I hope it helped you

If the surface area of the larger pyramid is 56 cm², the  of the smaller pyramid is approximately 42.7 cm².

To solve this problem, we can use the fact that the surface area of a pyramid is proportional to the square of its scale factor (ratio of corresponding side lengths) and the base area is proportional to the square of its scale factor.

Let the scale factor between the larger and smaller pyramid be x. Then, we have:

x² = 16/12.2
x = sqrt(16/12.2) = 1.143

This means that the corresponding side lengths of the smaller pyramid are 1.143 times smaller than those of the larger pyramid.

The surface area of the smaller pyramid can be found using:

(surface area of larger pyramid) / (base area of larger pyramid) = (surface area of smaller pyramid) / (base area of smaller pyramid)

56/16 = (surface area of smaller pyramid) / 12.2
(surface area of smaller pyramid) = 56/16 * 12.2 = 42.7

Therefore, the surface area of the smaller pyramid is approximately 42.7 cm².

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Answer:

(0,4)

Step-by-step explanation:

this is highest and only Y intercept. the range of a graph is all of the Y intercepts. and the domain of a graph is all of the x-intercepts

Answer:

314.16 in²

Step-by-step explanation:

The surface area of a sphere has a formula.

4πr²

Where r is the radius of the circle.

4π × 5²

4π  × 25

100π

= 314.159265

Answer:

314.16

Step-by-step explanation:

formula=4*pi*r^2

Therefore, The p-value is the probability of obtaining a test statistic as extreme or more extreme than the observed value, assuming the null hypothesis is true. If the p-value is less than the significance level, reject the null hypothesis; otherwise, fail to reject it.

To find the p-value from the t statistic on TI-84, you will need to perform a hypothesis test. Here are the steps:1. Enter your data into the calculator and choose the appropriate test.2. Calculate the t statistic by dividing the sample mean by the standard error.3. Determine the degrees of freedom. This is n-1 for a one-sample t-test or n1+n2-2 for a two-sample t-test. 4. Use the t-distribution table to find the critical value for your test.5. Calculate the p-value using the t-distribution function on the calculator.6. Compare the p-value to the significance level (usually 0.05) to determine whether to reject or fail to reject the null hypothesis.7.

Therefore, The p-value is the probability of obtaining a test statistic as extreme or more extreme than the observed value, assuming the null hypothesis is true. If the p-value is less than the significance level, reject the null hypothesis; otherwise, fail to reject it.

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Answer: 90

Step-by-step explanation:

Answer:

The absolute value of -90 is 90

Step-by-step explanation:

-90 is 90 away from 0.

Statistical significance is a valuable tool for analyzing data and determining if a change is likely to be meaningful.

However, it does have limitations. One limitation is that statistical significance does not measure the size or practical importance of the change. A statistically significant change may still be too small to be practically meaningful. Additionally, statistical significance does not consider the context or relevance of the change.

It only tells us if the observed difference is likely due to chance or if there is a true effect. Therefore, it is important to consider other factors, such as effect size and practical significance, when interpreting statistical significance.

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For the given standard deviation the minimum value we would assign is 22.the maximum value we would assign is 88.

To calculate the minimum and maximum values based on the given information, we need to consider the standard deviation and the respective interest rates for the 3-year and 10-year periods.

Given:

S = 26.32 (Initial value)

E = 55 (Expected value)

t = 3 (Years)

Standard deviation = 60% (of the expected value)

3-year interest rate = 2.4%

10-year interest rate = 3.1%

To find the minimum value, we will calculate the value at the end of the 3-year period using the lowest possible growth rate.

Minimum value calculation:

Minimum value = E - (Standard deviation * E) = 55 - (0.6 * 55) = 55 - 33 = 22

Therefore, the minimum value we would assign is 22.

To find the maximum value, we will calculate the value at the end of the 10-year period using the highest possible growth rate.

Maximum value calculation:

Maximum value = E + (Standard deviation * E) = 55 + (0.6 * 55) = 55 + 33 = 88

Therefore, the maximum value we would assign is 88.

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The value of x is 10.7 cm and an equation that finds the value of x is 4(x + 3) = 54.8. By using the perimeter of a square, the required equation is evaluated.

A square has 4 sides with equal lengths. We know that the perimeter is the total circumference of the shape. So, if the length of the square is 'a' then its perimeter is 4a.

It is given that, the length of the square a = x + 3 cm

The perimeter of the square 4a = 54.8 cm

Thus, on substituting the 'a' value into the perimeter, we get

4(x + 3) = 54.8

This is the required equation that finds the value of 'x'.

and on simplifying the obtained equation, we get

4x + 12 = 54.8

⇒ 4x = 54.8 - 12 = 42.8

∴ x = 42.8/4 = 10.7 cm

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Answer:

10 feet

Step-by-step explanation:

It becomes a right-angled triangle with height of 8feet and base of 6feet.

Using Pythagoras theorem:

a² = b² + c²

a² = 8² + 6²

a² = 64 + 36

a² = 100

a = √100

a = 10

Answer:

Step-by-step explanation:

We can use trigonometry to solve this problem. Let's draw a right triangle to represent the situation:

        |\

        | \

   h    |  \   9 ft

        |   \

        |    \

        |     \

        -------

        6 ft

Here, h represents the height on the wall where the ladder touches. We want to find the angle of elevation θ.

Using the right triangle, we can write:

sin(θ) = h / 9

cos(θ) = 6 / 9 = 2 / 3

We can solve for h using the Pythagorean theorem:

h^2 + 6^2 = 9^2

h^2 = 9^2 - 6^2

h = √(9^2 - 6^2)

h = √45

h = 3√5

So, sin(θ) = 3√5 / 9 = √5 / 3. We can solve for θ by taking the inverse sine:

θ = sin^-1(√5 / 3)

θ ≈ 37.5 degrees

Therefore, to the nearest tenth of a degree, the angle of elevation the ladder makes with the ground is 37.5 degrees.

Answer: yes, the value of x is 4 and angle HEB is 36 degrees

Step-by-step explanation:

1a. Find the value of angle CEB

Given that line segment AB and line segment EC are perpendicular you know they are right angles and therefore are equal to 90 degrees

2a.set up an equation

After noticing that angle CEB is 90 degrees you know that angle HEB+CEH=90 degrees: 13x+9x+2

3a. Solve the equation

13x+9x+2=90

22x+2=90 | combine like terms

22x=88 | subtract 2 from both sides

x=4 | divide by 22 on both sides

1b. Set up equation

Knowing x=4 and that angle HEB is 9x the equation is 9(4)

2b. Solve the equation

9(4)

36

The number of minutes a scented candle lasts if it burns out sooner than 80% of all scented candles is 244 minutes.

When the distribution is normal, we use the z-score formula.

In a set with mean µ and standard deviation σ , the z-score of a measure X is given by:

Z = (X – µ) / σ

The Z-score shows how many standard deviations the measure is from the mean. After finding the Z-score, need to look at the z-score table and discover the p-value associated with the z-score. This p-value is the probability that the value of the measure is smaller than X, means, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

So, in this case, given that:

µ = 249, σ = 20

The number of minutes a scented candle lasts if it burns out sooner than 80% of all scented candles:

100 – 80 = 20th percentile, which is X when Z has a p-value of 0.2. So, X when Z = –0.253.

Now, put all the values into the formula:

Z = (X – µ) / σ

–0.253 = (X – 249) / 20

X – 249 = –0.253 * 20

X = 244

Hence, the candle burns for 244 minutes.

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Answer:

uhhhhhhh

Step-by-step explanation:

Answer:

about 314 units

Step-by-step explanation:

i was confused but i hope this helps

0 = (x-8)^2 -100

Add 100 to both sides

100 = (x-8)^2

Take the square root of both sides

10 = (x-8)

Remove the parentheses

10 = x-8

Add 8 to both sides

18 = x

Answer: x = 18

Since, a fitted linear regression model is y=10+2x . If x = 1 and the corresponding observed value of y = 11,he residual at this observation is -1.

To calculate the residual at a given observation in a linear regression model, you subtract the predicted value of y from the observed value of y.

In this case, the observed value of x is 1 and the corresponding observed value of y is 11. The linear regression model is given by y = 10 + 2x.

Let's calculate the predicted value of y using the given x value:

y_ predicted = 10 + 2(1) = 10 + 2 = 12

Now we can calculate the residual:

residual = observed value of y - predicted value of y

residual = 11 - 12

residual = -1

Therefore, the residual at this observation is -1.

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SOLUTION

Given the question in the image, the following are the solution steps to answer the question.

STEP 1: Write the given equation for explicit formula

STEP 2: Write the given details

STEP 3: Get the explicit equation for f(n)

n = x

Substitute n for x in the equation in step 2.

Therefore, the explicit equation is given as:

STEP 4: Answer part B

To get how many lionfish in the bay after 6 years

Hence, there will be approximately 124073 lionfish

STEP 5: Get the recursive formula

1400 lionfish was removed per year, this gives an equation defined below:

Recursive formula is given as

Since we know that the difference each year is 1400, this gives the equation below:

By substitution, the recursive formula will be given by:

Since 1400 is removed each year, we have:

Answer:

Step-by-step explanation:

One that has the next least in common with the rest.