solve x/-5=-15 and i will give brainliest if right answers are
a. -45
b. 5
c. -5
d. 45

Answer:

43.586

nearest 10th= 43.6

nearest 100th= 43.59

nearest 1 =44  

Step-by-step explanation:

Answer:

Nearest tenths 43.6

Nearest hundredths 43.59

Nearest one 44

Step-by-step explanation:

Underline the number in the place value you want to round to. (ex. 43.586, if rounding to nearest tenths).

Is the number immediately to the right of this underlined number less than 5? Or is it greater than or equal to 5?

If the number is less than 5, then the underlined number stays the same.

If the number is greater than or equal to 5, then the underlined number increases by one.

In the example, we have 43.586. 8 is immediately to the right of the underlined number and it is greater than 5. Therefore, our underlined number, 5, increases by one to 6. Thus we have our answer 43.6

Answer:

18 quarts, 3 x 6 is 18.

Step-by-step explanation:

Probability all three drawn cards have numbers on them = 32.3%

Out of 52 total cards, there are 36 numbered cards.

In the first attempt probability of numbered cards being drawn

= 36 / 52

=0.692

After the first draw, total numbered cards remaining = 35

Total cards remaining = 51

Probability of numbered card in second attempt = 35 / 51

= 0.686

Probability of numbered card in third attempt = 34 / 50

= 0.68

Total probability of all cards being numbers = (36 / 52) x (35 / 51) x (34/50)

= 0.692 x 0.686 x 0.68

=0.323 x 100%

=32.3%

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The conclusion "(x)(A(x) ∨ B(x))" is false since there exist elements (e.g., 1) that satisfy B(x) but not A(x).

To show that the argument is invalid using the model universe method, we need to find a counterexample where the premises are true, but the conclusion is false.

Let's consider the following interpretation:

Domain of discourse: {1, 2}

A(x): x is even

B(x): x is odd

Under this interpretation, the premises "(x)(A(x) ∧ B(x))" and "(∃x)A(x)" are true because all elements in the domain satisfy A(x) ∧ B(x), and there exists at least one element (e.g., 2) that satisfies A(x).

However, the conclusion "(x)(A(x) ∨ B(x))" is false since there exist elements (e.g., 1) that satisfy B(x) but not A(x).

In this counterexample, the premises are true, but the conclusion is false, demonstrating that the argument is invalid using the model universe method.

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Answer:

Step-by-step explanation:

Choose a random fraction less than 1. I will choose 1/4.

1/6 ÷ 1/4 = 1/6 × 4/1 = 4/6 = 2/3

2/3 > 1/6 so this example supports his claim.

Now chose a fraction greater than 1. I will choose 4/3

1/6 ÷ 4/3 = 1/6 * 3/4 = 3/24

3/24 < 1/6 so this contradicts his claim

Z- test statistics should be used when computing a confidence interval given only the number in a sample, the population standard deviation and the sample mean.

A z-test can be used to assess whether or not the means of two populations differ if the data has a normal distribution. For this reason, it is essential to set up the null hypothesis, and the alternative hypothesis, and determine the z-test statistic's value. The choice criterion is founded on the z critical value.

The z-test formula compares the z statistic with the z critical value to see if there is a difference between the means of the two populations. In hypothesis testing, the z critical value delineates the acceptance and rejection regions of the distribution graph. If the test statistic falls within the rejection region, the null hypothesis can be rejected; otherwise, it cannot.

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Answer:

ZX = 1.3 in

EG = 3.0 in

M∠X = 48°

M∠G = 25°

Step-by-step explanation:

As we can see in the attached figure that these two triangles are identical i.e their corresponding sides and angles are equal

Therefore if we say that

ZX = EF

So ZX = 1.3 in.  

Now the same is applied for other sides and angles

EG = XY

So, EG = 3.0 in

M∠X = M∠E

hence, M∠X = 48°

For the M∠ G,

The angle is

= 180° - 107° - 48°

= 25°

Hence, the M∠ G is 25°

1/6 (-3/7)

Answer:

-1 /14

The correct answers are F. 200 and E. 180

A 95% Confidence Interval for a population mean: (195, 220), we can use this to find out which of the following are plausible values for the true population mean.

The confidence interval is given by x ± Zα/2(σ/√n)

where: x is the sample mean. Zα/2 is the Z-score for the confidence level (α)σ is the population standard deviation√n is the sample sizeWe are not given the sample size, so we can't calculate the exact confidence interval. However, we can say that the midpoint of the interval (also called the point estimate) is: Point estimate = (lower limit + upper limit)/2= (195 + 220)/2= 207.5Therefore, any value that is close to 207.5 could be a plausible value for the true population mean. Among the answer choices provided, 200 and 180 are the most plausible values for the true population mean because they are closest to 207.5.

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The control limits for 3-sigma x chart are

Upper Control Limit - 3.807 inches

Lower Control Limit - 2.291 inches

The control limits for the 3-sigma R-chart are Upper Control Limit- 2.373 inches

X-double bar = Sum of observations (x-bar) / Total number of observations

X-double bar = 73.17 / 24

X-double bar = 3.049

R-bar = Sum of observations (R) / Total number of observations

R-bar = 24.97 / 24

R-bar = 1.040

(a) The Upper Control Limit (UCLx) and Lower Control limit (LCLx) for the 3-sigma x-bar chart is calculated as,

UCLx = X-double bar + (A2 x R-bar)

LCLx = X-double bar - (A2 x R-bar)

From the table of factors for computing the control chart limits (3-sigma),

For n = 4 (4-pieces of precision cut wire)

A2 = 0.729

Putting these values in the above formulas, we get,

UCLx = 3.049 + (0.729 x 1.040)

UCLx = 3.807 inches

LCLx = 3.049 - (0.729 x 1.040)

LCLx = 2.291 inches

Based on the x-bar chart, the wire cutting process has been out of control, because the observation at 19th hour (4.51) lie outside the computed upper control limit and lower control limit.

(b) The Upper Control Limit (UCLr) and Lower Control limit (LCLr) for the 3-sigma  R-chart is calculated as,

UCLr = D4 x R-bar

LCLr = D3 x R-bar

From the table of factors for computing the control chart limits (3-sigma),

For n = 4 (4-pieces of precision cut wire)

D3 = 0, D4 = 2.282

Putting these values in the above formulas, we get,

UCLr = 2.282 x 1.040

UCLr = 2.373 inches

LCLr = D3 x R-bar

LCLr = 0 x 1.040

LCLr = 0 inches

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Answer: Cramer's rule is a method for solving systems of linear equations by using determinants. To use Cramer's rule, you first need to set up the system of equations in matrix form, like so:

[A][x] = [b]

where [A] is the coefficient matrix of the system, [x] is the vector of unknowns, and [b] is the vector of constants.

To apply Cramer's rule, you can solve for each unknown in [x] by calculating the determinants of a series of matrices that are formed by replacing one column of [A] at a time with the constants in [b]. Specifically, the solution for the ith unknown is given by:

xi = det([A]i) / det([A])

where [A]i is the matrix formed by replacing the ith column of [A] with the constants in [b], and det([A]) is the determinant of the original matrix [A].

To calculate the determinants, you can use any method you prefer, such as row reduction or cofactor expansion. Note that Cramer's rule only works for systems of linear equations with the same number of equations as unknowns, and it can be computationally expensive for large systems.

Step-by-step explanation:

There were 204 participants from the three schools

The given parameters are:

X = 12 + Y

X = Z - 18

Girls = Boys + 50

The ratios of the number of boys to girls in the schools are:

1 : 2

1 : 5

2 : 1

This means that:

So, we have:

Boys = 1/3X + 1/6Y + 2/3Z

Girls = 2/3X + 5/6Y + 1/3Z

Substitute the above equations in Girls = Boys + 50

2/3X + 5/6Y + 1/3Z = 1/3X + 1/6Y + 2/3Z + 50

Evaluate the like terms

1/3X + 2/3Y - 1/3Z = 50

Multiply through by 3

X + 2Y - Z = 150

So, we have:

X = 12 + Y

X = Z - 18

X + 2Y - Z = 150

Substitute X = 12 + Y in X = Z - 18 and X + 2Y - Z = 150

12 + Y = Z - 18 ⇒ Y - Z = 30

12 + Y + 2Y - Z = 150 ⇒ 3Y - Z = 138

Subtract Y - Z = 30 from the equation 3Y - Z = 138 to eliminate Z

2Y = 108

Divide by 2

Y = 54

Substitute Y = 54 in X = 12 + Y

X = 12 + 54

X = 66

Substitute X = 66 in X = Z - 18

66 = Z - 18

Solve for Z

Z = 66 + 18

Z = 84

So, the total number of participants from the 3 schools is

Total = X + Y + Z

This gives

Total = 66 + 54 + 84

Evaluate the sum

Total = 204

Hence, there were 204 participants from the three schools

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If the correlation between two variables x and y is r=0.25, the variation in y would be explained by the linear regression of y on x is 6.25%. Correct option is D.

The square of the correlation coefficient (r) is equal to the proportion of the variance in y that can be explained by the linear regression of y on x.

Therefore, in this case, the proportion of the variance in y that can be explained by the linear regression of y on x is:

r^2 = 0.25^2 = 0.0625

This means that 6.25% of the variance in y can be explained by the linear regression of y on x.

So the correct answer is d. 6.25%.

Other factors, such as the sample size, the distribution of the variables, and the presence of outliers, should also be taken into consideration when evaluating a regression model.

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Answer:

x is 35

Step-by-step explanation:

the two angles are opposite so they are equal

Answer:

x = 35°

Step-by-step explanation:

Vertical Angles

When two lines cross, two pairs of angles are formed. Those who are opposed by the vertex are called vertical angles and they are always congruent.

Congruent angles have the same measure.

Thus, the angle marked as x is opposed to 35° and they have the same measure, thus:

x = 35°

Therefore, the best estimate for the frog population, to the nearest whole number, is 2500.

An equation is a mathematical statement that shows that two expressions are equal to each other. An equation typically contains one or more variables (represented by letters), which are unknown values that we want to find. Equations are used to solve problems in a wide variety of mathematical and scientific fields, as well as in everyday life.

Here,

To estimate the frog population, we can use the mark and recapture method, also known as the Lincoln-Petersen index. The basic idea is that if we mark a portion of a population and release them back into the wild, then we can later recapture a sample of the population and use the proportion of marked individuals in the sample to estimate the size of the entire population. The formula for the Lincoln-Petersen index is:

Estimated population size = (Number marked in first sample * Number in second sample) / Number recaptured in second sample

Using the given information, we can plug in the values and get:

Estimated population size = (85 * 500) / 17

Estimated population size = 2500

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1. LE and OL are adjacent because they share the same angle.

2. <T and <A are opposite angles

3. <C and <T and Adjacent angles.

These are two angles that share a common side and the same corner point or vertex.

These are non-adjacent angled that are created by two lines crossing each other.

The correct answers, therefore, are C, D, and C.

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Answer:

Step-by-step explanation:

I know this isnt graphed on paper but here you go,

Blue: \(y=-\frac{2}{3}x+3\)

Green: \(-4x+5\)

Red: \(y=3x-3\)

you can use desmos's graphing calculator online

\(1) \: y = 3x - 3 \\ 0 = 3x - 3 \\ - 3x = - 3 \\ x = \frac{ - 3}{ - 3} \\ x = 1 \\ y = 3x - 3 \\ 3(0) - 3 \\ y = - 3 \\ 2) \: y = - \frac{2}{3} x + 3 \\ 0 = - 2x + 9 \\ 2x = 9 \\ x = \frac{9}{2} \\ y = - \frac{2}{3}(0) + 3 \\ y = 3 \\ 3) \: y = 4x + 5 \\ 0 = 4x + 5 \\ - 4x = 5 \\ x = - \frac{5}{4} \\ y = 5\)

Answer:

D.

Step-by-step explanation:

The punnet square is divided into 4 sections. RR means red, Rr means pink, and rr means white.

There is only one square with RR, so that's 25% red. (1 out of 4 squares)

Two squares are Rr, which means 50% are pink.

One square is rr, which means the remaining 25% is white.

Answer:

There are 68,640 different ways the runners can finish first, second, and third in the race.

Concept of Permutations

The number of different ways the runners can finish first, second, and third in a race can be calculated using the concept of permutations.

Brief Overview

Since there are 42 runners competing for the top three positions, we have 42 choices for the first-place finisher. Once the first-place finisher is determined, there are 41 remaining runners to choose from for the second-place finisher. Similarly, once the first two positions are determined, there are 40 runners left to choose from for the third-place finisher.

Calculations

To calculate the total number of different ways, we multiply the number of choices for each position:

42 choices for the first-place finisher × 41 choices for the second-place finisher × 40 choices for the third-place finisher = 68,640 different ways.

Concluding Sentence

Therefore, there are 68,640 different ways the runners can finish first, second, and third in the race.

Answer:

9

Step-by-step explanation:

18%of 50

18/100×50

0.18×50= 9

Answer:

9

Step-by-step explanation:

18% of 50

We can rewrite it as,

> 18/100 * 50

Solving,

Hence,18% of 50 = 9

Answer: C

Step-by-step explanation:

-25+-15+43

-15+43+-25

43+-15+-25

43+-25+-15

-15+-25+43

-25+43+-15

all equal 3

Answer:

256

Step-by-step explanation:

Answer:

256 cm

Step-by-step explanation:

16 x 4 = 64

16 x 8 = 128

8 x 8 = 64

64 + 64 = 128  + 128 = 256

Answer:

18 4/5

Step-by-step explanation:

Basically, all you have to do is add these.

One thing you can do is simplify the fractions and make it so each of them have the same denominator. 7 2/3 will be 7 10/15 and 10 3/5 will be 10 9/15. Now just add these numbers and you will get 17 19/15. Simplify this and you will have 18 4/5.

Hope this helped! Please mark me as brainliest!

Answer:

18 and 4/15 cups

Step-by-step explanation:

7 2/3 + 10 3/5

2/3 * 5/5 = 10/15 (because you need common denominators)

3/5 * 3/3 = 9/15  (because you need common denominators)

7 10/15 + 10 9/15 = 17 19/15 = 18 4/15