Will mark brainliest.. There are 3 questions related to the problem in the first picture. please help thanks.

Answer:

The probability that someone is vaccinated and contracts the disease is (0.25)(0.1)=0.025 (it is multiplied by 0.1 because if the vaccine is 90% effective, then there is a 10% chance someone that is vaccinated can contract the disease.  Add these together for the total:  0.375+0.025=0.4

There is a 40% chance that someone chosen at random will contract the disease.

Answer:

Angela needed to multiply [tex]\frac{1}{2}[/tex] by each of the terms inside the parentheses.

Her product when multiplying [tex]\frac{1}{2} X 2[/tex] is incorrect.

Step-by-step explanation:

For simplifying the expression [tex]\frac{1}{2}(3x+2)[/tex], we need to multiply [tex]\frac{1}{2}[/tex] by each of the terms inside the parentheses.

So,

Upon multiplying [tex]\frac{1}{2}[/tex] by 6X we get 3X.

Upon multiplying [tex]\frac{1}{2}[/tex] by 2 we get 1.

Thus the final simplified expression must be 3x+1

So we can say,

Angela needed to multiply [tex]\frac{1}{2}[/tex] by each of the terms inside the parentheses.

Her product when multiplying [tex]\frac{1}{2} X 2[/tex] is incorrect.

Angela attempted to use the distributive property to simplify the expression 1/2 (6X + 2), but while she correctly simplified 1/2 * 6X to 3X, she incorrectly simplified 1/2 * 2 as 2, instead of 1. Therefore, her method was correct, but the computation was incorrect.

In mathematics, the Distributive Property is used to simplify expressions like the one Angela has used - 1/2 (6X + 2). In order to distribute correctly, Angela should perform the operation of multiplication for each term inside the parentheses by the 1/2 outside the parentheses. Therefore, it should look like this: (1/2 * 6X) + (1/2 * 2). This will simplify to 3X + 1. The issue with Angela's work was that, while she correctly simplified 1/2 * 6X to 3X, she incorrectly simplified 1/2 * 2 as 2, instead of the correct 1 value. Therefore, the correct statement about Angela's work is "Her product when multiplying is incorrect".

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By definition we have to:

Natural resources are all the material goods and services provided by nature without alteration by human beings; and that they are valuable for human societies because they contribute directly to their well-being and development (raw materials, minerals, food) or indirectly (essential ecological services for the continuity of life on the planet).

Therefore, the depletion of natural resources is considered an environmental cost because without these resources, life on planet Earth is difficult as we know it today.

Answer:

C. Resource depletion

For the given set of parallel lines l and m, the value of x is equal to 4.

According to the question,

l ║ m

As per the theorem pertaining to transversal and parallel lines,

∠1 and ∠2 are supplementary if and only if they are interior angles.

m∠1 + m∠2 = 180°                    _____(1)

Here, ∠1 = 20x + 5

∠2 = 24x - 1

Substitute the value ∠1 and ∠2 in (1), we get

20x + 5 +24x - 1 = 180°

44x + 4 = 180°

44x = 176

x = 4

Hence, for the given set of parallel lines l and m, the value of x = 4.

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First step to solve this is to convert this mixed fraction into improper fraction. To convert this, you need to multiply the denominator to the whole number then add the numerator. The result would be the numerator of the improper fraction. The denominator is the same:

(25 x 3) + 16 = 91

Therefore, the improper fraction is 91/25. To change this to percentage, you need to divide the numerator with the denominator and multiply by 100.

91/25 = 3.64 x 100 = 364%

Answer:

339.375  choose d

Step-by-step explanation:

Regular work 40 hours and 3.5 overtime hours

Overtime wage is 1.5 times the regular one

40×7.5+3.5×7.5×1.5=339.375

The recursive rule is: [tex]\(a_1 = 7\); \(a_n = a_{n-1} - 2\)[/tex]. The correct option is D.

Sure, here's the step-by-step solution:

1. Start with the explicit rule for the sequence: [tex]\(a_n = -2n + 7\)[/tex].

2. To find the recursive rule, we need to express [tex]\(a_n\)[/tex] in terms of [tex]\(a_{n-1}\)[/tex], the previous term in the sequence.

3. Replace [tex]\(n\)[/tex] in the explicit rule with [tex]\(n-1\)[/tex] to represent the previous term:

[tex]\[a_{n-1} = -2(n-1) + 7\][/tex]

[tex]\[a_{n-1} = -2n + 2 + 7\][/tex]

[tex]\[a_{n-1} = -2n + 9\][/tex]

4. Since [tex]\(a_n = a_{n-1} - 2\)[/tex], substitute the expression for [tex]\(a_{n-1}\)[/tex] from step 3 into the recursive rule:

  [tex]\[a_n = (-2n + 9) - 2\][/tex]

  [tex]\[a_n = -2n + 9 - 2\][/tex]

  [tex]\[a_n = -2n + 7\][/tex]

So, the recursive rule is [tex]\(a_1 = 7\); \(a_n = a_{n-1} - 2\)[/tex]. Therefore, the correct answer is D.

The correct question is:

The explicit rule for a sequence is given.

an=−2n+7

What is the recursive rule for the sequence?

A. a1=7; an=an−1+2

B. a1=5; an=an−1−2

C. a1=−2; an=an−1+7

D. a1=7; an=an−1−2

Answer:

B

Step-by-step explanation:

TT two tails/no heads

TH one tail/one head

HT

HH two heads/no tails

The number of possible outcomes if two quarters are tossed and the total numbers of heads and tails are counted is 8.

Probability refers to a possibility that deals with the occurrence of random events.

The probability of all the events occurring need to be 1.

Since there are number of possibility as;

TT two tails/no heads

TH one tail/one head

HTand HH two heads/no tails

Each quarter will come up heads or tails which is 2 possibilities.

Thus for three tosses the number of outcomes is 2 x 2 x 2 = 8.

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Answer:

Lori will make $27.00 more.

Step-by-step explanation:

The formula to calculate simple interest is

A = P(1+rt)

P = Principal amount

r = rate of interest ( in decimal )

t = time

First we calculate Darryl's deposit, so put the values in the formula

A = 1,500(1 + 0.027×10)

A = 1,500 ( 1+0.27 )

A = 1,500 × 1.27

A = $1905

Now we will calculate Lori's deposit

A = 1,400 ( 1 + 0.038 × 10 )

A = 1,400 ( 1 + 0.38 )

A = 1,400 × 1.38

A = $1,932

Lori will make money after 10 years = $1,932

Darryl will make money after 10 years = $1905

so Lori will make more than Darryl, the difference will be = 1,932 - 1,905 = $27

After 10 years Lori will have make $27.00 more in their account.

Answer:

$27

Step-by-step explanation:

plez give brainliest

Answer:

D). Y'= [tex]4x^{5}-12x^{4}+6x[/tex] and y'= [tex]5x^{3}-2x[/tex]

Step-by-step explanation:

We are given the equation [tex]4x^{5}-12x^{4}+6x=5x^{3}-2x[/tex].

On simplifying this equation, we get [tex]4x^{5}-12x^{4}-5x^{3}+8x=0[/tex]

i.e. Let, Y'= [tex]4x^{5}-12x^{4}+6x[/tex] and y'= [tex]5x^{3}-2x[/tex]

Now, according to the options,

A) Y =  [tex]-4x^{5}+12x^{4}-6x[/tex] = -Y' , that means the graph will be inverse of the required graph.

B) As the coefficient of 'x' in our given equation and the equation of option B are different, both will have different graphs.

C) As y =  [tex]-5x^{3}+2x[/tex] = -y', this means that the graph will be inverse of the required graph.

Hence, all above options are discarded and so option D is correct.

The equation relating the cost of admission (c) to the number of people (p) is c = 50 * p. For 17 people, the total cost is c = 50 * 17, which equals $850.

To write an equation relating c to p, we set c, the cost of admission for p people, equal to the admission fee per person multiplied by the number of people. Given that the admission fee per person is $50, the equation is:

c = 50 * p

Using this equation to find the cost of admission for 17 people:

c = 50 * 17

c = $850

Therefore, the cost of admission for 17 people is $850.

The value of x is 2 and value of y is 3 in the system of equation.

Two or more expressions with an Equal sign is called as Equation.

The system of equations are 4x+5y=7

y=3x+9

We have to find the value of x and y by substitution method in system of equation

Substitute the value of y in first equation

4x+5(3x+9)=7

4x+15x+45=7

Add the like terms

19x+45=7

Subtract 45 on both sides

19x=7-45

19x=-38

Divide both sides by 19

x=-2

Now plug in x value

y=3(-2)+9

y=3

Hence, the value of x is 2 and value of y is 3 in the system of equation.

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Final answer:

Bill's biking speed is 12 mph and his walking speed is 4 mph. We find the biking speed from the 20-minute ride distance and solve for the walking speed using the time difference in the 30-minute trip.

Explanation:

The student is asking about calculating walking and biking speeds based on different times to cover distances. To solve this, we'll use the information that Bill takes 30 minutes to ride 3 miles and then walk 1 mile, but only 20 minutes to ride the entire 4 miles to school.

First, we want to find the speed for each part of the trip when Bill takes 30 minutes. Since we know the total time and distances, we can set up two equations using the relationship speed = distance / time. Let's define biking speed as 'b' and walking speed as 'w'.

For the 30-minute trip:
3 miles / b + 1 mile / w = 0.5 hours

For the 20-minute, all biking trip:
4 miles / b = (1/3) hours

From the second equation, we find that b = 4 miles / (1/3 hour) = 12 mph. Substitute 'b' in the first equation:
3 miles / 12 mph + 1 mile / w = 0.5 hours
1/4 hour + 1 mile / w = 0.5 hours

To solve for 'w', we'll subtract the bike time from the total time:
1 mile / w = 0.5 hours - 1/4 hour
1 mile / w = 1/4 hour

So, the walking speed 'w' is 1 mile / (1/4 hour) = 4 mph.

Therefore, Bill's biking speed is 12 mph, and his walking speed is 4 mph.

Answer:

11.25 cm2 would be your answer.

Answer: The graph  approaches -3 as x approaches infinity will be the correct option which describes the behavior of the function.

Explanation:

Given Function: f(x)= [tex]\frac{3x}{4-x}[/tex]

Now, we divide numerator and denominator by x and we get,

⇒ [tex]f(x)= \frac{3}{4/x-1}[/tex]

If x approaches to infinity.

Therefore, [tex]\lim_{x\rightarrow \infty}f(x)[/tex]

then [tex] f(x)\rightarrow -3[/tex]

Thus, we can say f(x) approaches -3 as x approaches infinity

Answer:

-3

Step-by-step explanation:

the answer is 40 bars hope it helps

Setting up a system of equations, we find that there is an error in the problem or the information provided.

Let's set up a system of equations to solve this problem.

Let's say the number of nickels is x and the number of quarters is y. From the information given in the problem, we can set up two equations:

Now we can solve this system of equations. Substituting the second equation into the first equation, we get:

x + (x + 13) = 7.75

Simplifying the equation, we get:

2x + 13 = 7.75

Subtracting 13 from both sides, we have:

2x = -5.25

Dividing both sides by 2, we find:

x = -2.625

Since we can't have a negative number of coins, there must be an error in the problem or the information provided.

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Calvin and Alvin together take approximately 1.875 hours, or 1 hour and 52.5 minutes, to wax a car.

To find out how long it takes Calvin and Alvin to wax a car together, we can use the formula for working together:

[tex]\[\frac{1}{T} = \frac{1}{T_1} + \frac{1}{T_2}\][/tex]

Where:

-[tex]\( T \)[/tex] is the time taken when working together,

- [tex]\( T_1 \)[/tex] is the time taken by Calvin alone, and

- [tex]\( T_2 \)[/tex] is the time taken by Alvin alone.

Given:

- Calvin takes 3 hours to wax a car alone, so [tex]\( T_1 = 3 \)[/tex] hours,

- Alvin takes 5 hours to wax a car alone, so [tex]\( T_2 = 5 \)[/tex] hours.

Substitute the values into the formula:

[tex]\[\frac{1}{T} = \frac{1}{3} + \frac{1}{5}\][/tex]

To solve for T, first find a common denominator:

[tex]\[\frac{1}{T} = \frac{5}{15} + \frac{3}{15} = \frac{8}{15}\][/tex]

Now, invert both sides of the equation to isolate T:

[tex]\[T = \frac{15}{8} \text{ hours} \approx 1.875 \text{ hours}\][/tex]

So, it takes Calvin and Alvin approximately 1.875 hours, or 1 hour and 52.5 minutes, to wax a car together.

The Correct Question is :

Suppose that it takes Calvin 3 hours to wax a car if he works alone and it takes Alvin 5 hours to wax a car if he works alone.

How long does it take them to wax a car if they work together? Write an equation and solve for the unknown.

Show your work.