PLZZZZ HELP
martin tosses 4 pennies, what is the probability that at least 3 coins land on heads

Answer:

Step-by-step explanation:

3h - 8h + 10 = 10 - 5h

-5h + 10 = 10 -5h

10 = 10

infinitely many solutions

answer is C

To find the surface area of the figure, we need to consider the individual surfaces and add them together.

First, let's identify the surfaces of the figure:

The lateral surface area of the larger prism (excluding the base)

The two bases of the larger prism

The lateral surface area of the smaller prism (excluding the base)

The two bases of the smaller prism

The lateral surface area of a prism is given by the formula: perimeter of the base multiplied by the height.

The bases of the prisms are rectangles, so their areas can be calculated by multiplying the length by the width.

To find the missing prism's surface area, we need to consider that it is a smaller prism nested inside the larger prism. The lateral surface area and bases of the missing prism should also be included.

Once we have calculated the individual surface areas, we add them together to find the total surface area of the figure.

Without specific measurements or dimensions of the figure, it is not possible to provide a numerical answer. Please provide the necessary measurements or dimensions to calculate the surface area.

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∡ NKM + ∡KNM + ∡ NMK = 180° Because Angles in a triangle ΔNKM sum to 180°

∡ NKM + 90° + 60° = 180°

∡ NKM = 30°

∡ NKM = ∡JKN = ∡ MKL = 30° because ΔJKM∼ΔNKM∼ΔMKL

Finally:

∡ JKL = ∡ NKM + ∡JKN + ∡ MKL

∡ JKL =  30° +  30° +  30°

∡ JKL = 90°

With the help of properties of triangle ∠JKL = 90 degrees.

To prove:

∠JKL = 90 degrees.

Here,

Angle sum property of triangle:

In any triangle sum of angles is 180 degrees.

So,

In ΔNKM

∡ NKM + ∡KNM + ∡ NMK = 180°

∡ NKM + 90° + 60° = 180°

∡ NKM = 30°

Now,

ΔJKM∼ΔNKM∼ΔMKL (By AAA)

Thus,

∡ NKM = ∡JKN = ∡ MKL = 30°

Next,

∡ JKL = ∡ NKM + ∡JKN + ∡ MKL

∡ JKL =  30° +  30° +  30°

∡ JKL = 90°

Hence proved.

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The probability of the car encountering it's first red light on the third day, i.e., P(Y = 3) will be 0.1479

According to the question,

we have to calculate the probability of the car encountering it's first red light on the third day, i.e., P(Y = 3)

Here,

Probability of encountering a Red light = 0.35, since traffic light at the intersection is red 35% of the time.

And Y is the number of days that pass up to and including the first time the car encounters a red light, i.e.,

The distribution here is a geometric one, where

P(Y = 3)

= P(Not red light in initial 2 lights) x P(red light in third light)

= [(1 - 0.35)² X 0.35]

= 0.1479

so, the probability of the car encountering it's first red light on the third day, i.e., P(Y = 3) will be 0.1479.

Note:

mean and variance of this question is not possible to find out.

the complete question ends till the probability to find the first red light on the third day.

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Answer:

Mai

Step-by-step explanation:

To find the rate, you must determine who is going faster per minute. To do this, you must divide the total number of miles by the total number of minutes.

Mai: 5 miles / 15 minutes = 1/3 miles per minute

Jada: 4 miles / 14 minutes = 2/7 miles per minute

Then, use a common denominator to make calculations easier:

Mai: 1/3 * 7/7

Jada: 2/7 * 3/3

You should get:

Mai: 7/21 miles per minute

Jada: 6/21 miles per minute

By looking at this, you can see that Mai is traveling slightly faster, going more miles than Jada per minute.

Answer: A≈340.86cm²

Step-by-step explanation:

Answer:

The number that goes in the ( ) is 0.

Step-by-step explanation:

the role of the seed value in a random number generator is to initialize the internal state of the generator and serve as the basis for the calculated pseudorandom numbers produced by the algorithm.

The seed value of a random number generator is an important input that determines the sequence of numbers generated by the generator. In particular, the seed value serves as the basis of the calculated pseudorandom numbers produced by the generator.

A pseudorandom number generator is a deterministic algorithm that produces a sequence of numbers that appear to be random, but are actually generated using a mathematical formula or algorithm. The sequence of numbers produced by the generator is not truly random, but is instead a sequence that is determined by the seed value and the algorithm used to generate the numbers.

When a seed value is provided to a pseudorandom number generator, it is used to initialize the internal state of the generator. This internal state is used by the generator to produce the sequence of pseudorandom numbers. Different seed values will result in different sequences of numbers, even when the same algorithm is used.

The seed value does not determine the maximum or minimum values that can be generated by the generator. Instead, the range of values that can be produced is determined by the algorithm used to generate the numbers. The seed value only affects the sequence of numbers produced by the generator.

In summary, the role of the seed value in a random number generator is to initialize the internal state of the generator and serve as the basis for the calculated pseudorandom numbers produced by the algorithm. The seed value does not determine the maximum or minimum values that can be generated, but only affects the sequence of numbers produced by the generator.        

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The equation has one solution.

What is a "Simple Equation"?

The link between two expressions on either side of the sign is represented by a mathematical equation. Typically, it has a single variable and an equal sign. Like this: 2x - 4 Equals 2. Equations can be divided into two categories: identities and conditional equations. Any value of the variables results in an identity being true.

                               Only certain values of the variables in a conditional equation result in truth. When two expressions are joined together by the equals sign ("="), the result is an equation.

X = 2

X = -2

X + 1  =  -1

The factors of this equation are x + 2 and x – 1, which gives solutions x = –2 and x = 1. Substituting either solution into the given equation gives a true statement, so they're both solutions.

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Answer:

Step-by-step explanation:

p(x)=7x+20

p=7x/x + 20/x

answer   p=7+20/x

I hope its helpful.

Based on the percentage of men workers in the company, the total number of workers is 2,500.

The percentage is the fractional value of a variable concerning another.

Percentages are like ratios and proportions, which show the numerical relationship between the independent and dependent variables.

The percentage of men workers = 95%

The number of non-men workers = 125

The percentage of non-men workers = 5% (1 - 95%)

If 5% of the workers are 125, the total number of workers, 100% = 2,500 (125/5% x 100%).

Check:

Men workers = 95% = 2,375

Non-men workers = 5% = 125

Total = 2,500

Thus, given the percentage of men workers as 95%, the total number of workers in the company is 2,500.

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It is not possible to construct a triangle whose sides are 9 cm 7 cm and 17 cm because the sum of two sides(9 cm and 7 cm) are smaller than third sides(17 cm).

In the given question, we have to check that it is possible to construct a triangle whose sides are 9 cm 7 cm and 17 cm.

To check whether the given sides can make a triangle or not, we have to check that the sum of two sides always greater than the third side.

To check this we firstly add the 9 and 7

9 + 7 < 17

16 < 17

Now we add 17 and 7

17 + 7 > 9

24 > 9

Now we add 9 and 17

9 + 17 > 7

26 > 7

It is not possible to construct a triangle whose sides are 9 cm 7 cm and 17 cm because the sum of two sides(9 cm and 7 cm) are smaller than third sides(17 cm).

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Answer: 4.8lbs, This claim is false

Step-by-step explanation:

Leo weighs 192 pounds. Then Leo's heart weight will be 76.258 ounces. So, its claim is false.

A ratio is a group of sequentially ordered numbers a and b expressed as a/b, where b is never equal to zero. When two objects are equal, a statement is said to be proportional.

Hummingbirds have abnormally huge hearts for their body size. In the event that an individual's heart was essentially as large as a hummingbird's, their heart would weigh as much as an enormous canine's. A typical hummingbird weighs 0.3524 ounces and has a heart that weighs 0.00875 ounces.

The ratio of heart to weight is given as,

Ratio = 0.00875 / 0.3524

Ratio = 0.024829

The average weight of a large dog is usually more than 80 pounds. Leo weighs 192 pounds. Then Leo's heart weight is calculated as,

⇒ 0.024829 x 192 x 16

⇒ 76.28 ounces

Their heart weight of Leo is less than the weight of the dog. So, its claim is false.

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This is a contradiction, which means that our initial assumption that there are n children is incorrect. Therefore, there is no solution to this problem that satisfies the given conditions.

Let's assume that there are n children in the Smith family.

We know that the father is 48 years old, so the sum of the ages of the mother and children is:

Total age = (n + 1) * 20 (as there are n children and 1 father)

And we also know that the average age of the mother and children is 16, so we can write:

Total age / (n + 1) = 16

Combining these two equations, we get:

(n + 1) * 20 / (n + 1) = 16

Simplifying, we get:

20 = 16

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To find the probability of rolling an odd number, we need to add up the probabilities of rolling 1, 3, or 5.  Therefore, the probability of rolling an odd number on this loaded die is 4/7.

1. There are 6 numbers on a die (1, 2, 3, 4, 5, and 6).
2. 3 appears twice as often as the other numbers, while the other 5 numbers are equally likely.

Let's assume the probability of getting each of the other numbers (1, 2, 4, 5, 6) is x. Since 3 appears twice as often, its probability would be 2x. The total probability is 1, as one of these numbers will definitely show up when the die is rolled:

1x + 1x + 2x + 1x + 1x + 1x = 1
7x = 1
x = 1/7

Now, let's find the probability of rolling an odd number (1, 3, or 5):
First, we need to find the probability of rolling each number on the loaded die. Since 3 appears twice as often as the other numbers, its probability is 2/8 or 1/4. The probability of rolling each of the other five numbers is 1/8.

P(1) = x = 1/7
P(3) = 2x = 2(1/7) = 2/7
P(5) = x = 1/7

The probability of rolling an odd number is the sum of the probabilities of rolling a 1, 3, or 5:

P(odd) = P(1) + P(3) + P(5) = (1/7) + (2/7) + (1/7) = 4/7

So the probability of rolling an odd number on this loaded die is 4/7.

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Answer:

x/2

Step-by-step explanation:

2/2=1=y

4/2=2=y

6/2=3=y

A table or spreadsheet used to systematically evaluate options according to specific criteria is a decision matrix.

A decision matrix is a table or spreadsheet used to systematically evaluate options based on specific criteria. It is a tool commonly used in decision-making processes to objectively assess and compare different choices.

The decision matrix organizes the criteria in rows and the options in columns. Each cell in the matrix represents the evaluation or score of an option based on a particular criterion. The criteria can be weighted to reflect their relative importance in the decision-making process.

By filling out the decision matrix with scores or ratings for each option and criterion, a comprehensive evaluation can be performed. The matrix allows decision-makers to visualize and compare the performance of different options against the criteria, helping them make more informed and structured decisions.

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The student has prepared a homogeneous mixture. Option C is correct.

When a mixture's composition is not consistent throughout, it is said to be heterogeneous. Example oil and water.

Mixtures that are homogeneous have a consistent structure or makeup. For example salt in water.

When magnesium chloride is dissolved in water, it completely disappears. So, the uniform composition of the solution is formed.

Therefore, the student has prepared a homogeneous mixture.

Hence, option C is correct.

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Answer:

Step-by-step explanation:

Make a quadratic:

2\(x^{2}\)-8x+7=0

Then use quadratic formula to solve.

It would be x=   2 ±   \(\frac{2}{\sqrt{2} }\)

Answer:

B

Step-by-step explanation:

given

tanΘ = \(\frac{3\sqrt{5} }{2}\) = \(\frac{opposite}{adjacent}\)

this ratio relates to a right triangle, with hypotenuse h and

legs 3\(\sqrt{5}\) and 2

using Pythagoras' identity in the right triangle

h² = (3\(\sqrt{5}\) )² + 2² = 45 + 4 = 49 ( take square root of both sides )

h = \(\sqrt{49}\) = 7

then

cosΘ = \(\frac{adjacent}{hypotenuse}\) = \(\frac{2}{7}\)

3/4 + 1/8 + 1/10 = 39/40

............................................

Answer:

39/40 Please mark my answer the brainliest. It will get me to the next level!

Step-by-step explanation:

4=4, 8, 12, 16, 20, 24, 28, 32, 36, 40

8=8, 16, 24, 32, 40.

10=10, 20, 30, 40.

GCF=40

3/4=30/40

1/8=5/40

1/10=4/40

30+5+4=39

The gardener would need 9000π square meters of weed block fabric to cover the area of both gardens.

A. To outline the smaller garden A, the gardener would need to measure the circumference of the circle, which is given by the formula C = πd, where d is the diameter. Therefore, the circumference of garden A would be C = π(65) = 65π meters.

B. To find the difference in edging required between the two gardens, we need to find the difference in their circumferences. The circumference of garden B is C = π(85) = 85π meters. Therefore, the additional edging required for garden B compared to garden A would be 85π - 65π = 20π meters.

C. The area of a circle is given by the formula A = πr^2, where r is the radius. The radius of garden A is 65/2 = 32.5 meters, and the radius of garden B is 85/2 = 42.5 meters. Therefore, the total area of both gardens is:

A_total = π(32.5)^2 + π(42.5)^2

= 3325π + 5675π

= 9000π

Therefore, the gardener would need 9000π square meters of weed block fabric to cover the area of both gardens.

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Answer:

As A'B'C'  rotates, each of the vertices moves in a circular arc along one of the three circles.

Step-by-step explanation:

PLATO

Answer:

As A'B'C'  rotates, each of the vertices moves in a circular arc along one of the three circles.

Step-by-step explanation:

Given the inequality

Add 7f on both sides.

Add -4 on both sides.

Divide by 9 on both sides.

which is the simplest form.

Answer:

\(\frac{20}{36}\)

Step-by-step explanation:

the total amount of squares within this square is 36

and the number of shaded squares would be 20

so if 20 squares out of 36 squares are shaded, then the fraction is

\(\frac{20}{36}\)

or 55.56%

(to find percentage multiply \(\frac{20}{36}\) by 100)

Answer:

5/9

= 55.56% ( to the nearest hundredth).

Step-by-step explanation:

The total number of little squares in the large square = 6*6 = 36.

Total number of shaded squares = 2*6 + 2*4

= 12 + 8 = 20.

So the fraction of shaded part

= 20/36

= 5/9.

As a percentage this is 5*100/9

= 55 5/9%

= 55.55..... %

Answer:

2 x-5

Step-by-step explanation:

Answer:

4:

\(3x + 6y = 12 \\ 6y = - 3x + 12 \\ y = - 0.5y + 2 \\ m = - 0.5 \\ b = 2\)

5 :

NR:

N=(-2,3)

-2×-0.5+2=1+2=3✓

R=(2,1)

2×-0.5+2=1✓

The simple interest she will have to pay equals R 1275, and the total she will pay equals R 9775 for her TV over the past 3 years.

Thuli wants to buy TV, and a bank offers to loan her the money at an interest rate.

Principal, P = R 8,500

Interest Rate, R = 5%

Time, t = 3 year

Simple interest is defined as an interest charge that borrowers pay their lenders for a loan. It is calculated using the principal only. Formula for SI is written as SI = (P×T×R)/100

Here, SI = Simple interest

P = Principal (sum of money borrowed)

R = Rate of interest p.a

T = Time (in years)

We have to calculate simpled interest she will have to pay also calculate the total she will pay.

So, Simple interest = (8500×3×5)/100

= 85× 15 = R 1275

Now, total she will have to pay = Principle + SI

= 8500 + 1275

= R 9775

Hence, required total she will pay is R9775.

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Answer:its upside down sir

Step-by-step explanation: