ill mark brainlist plss help

Answer:

B

Step-by-step explanation:

Answer:

9 my guy (if I'm wrong then I'm stoopid)

Step-by-step explanation:

The left side of the equation is equal to the right side, which confirms that a = 11/10 is the correct solution.

To solve the equation, we need to isolate the variable "a". The equation is given as a - 1/2 = 3/5.
To eliminate the fraction, we can multiply both sides of the equation by the least common denominator (LCD), which is 10. This will clear the fractions and make the equation easier to solve.
Multiplying the left side of the equation by 10, we get:
10(a - 1/2) = 10(3/5)
10a - 5 = 6
Next, we can simplify the equation by adding 5 to both sides:
10a - 5 + 5 = 6 + 5
10a = 11
Finally, we can solve for "a" by dividing both sides of the equation by 10:
(10a)/10 = 11/10
a = 11/10
Therefore, the solution to the equation is a = 11/10 or a = 1 1/10.
To check the solution, substitute a = 11/10 back into the original equation:
11/10 - 1/2 = 3/5
(11/10) - (5/10) = 3/5
6/10 = 3/5
In summary, the solution to the equation a - 1/2 = 3/5 is a = 11/10 or a = 1 1/10. This solution has been checked and is correct.

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Answer:

\(x=2\)

Step-by-step explanation:

\(3(x-4)=2(-2x+1)\\3x-12=2(-2x+1)\\3x-12=4x+2\\3x-12+12=-4x+2+12\\\\x=2\)

Answer:

x = 2

Step-by-step explanation:

3(x - 4) = 2(- 2x + 1) ← distribute parenthesis on both sides )

3x - 12 = - 4x + 2 ( add 4x to both sides )

7x - 12 = 2 ( add 12 to both sides )

7x = 14 ( divide both sides by 7 )

x = 2

The average student spends approximately 0.33 hours (or 20 minutes) in the cafeteria during the two-hour lunch break period in a US curriculum class.

To calculate the average time spent by a student in the cafeteria during the two-hour lunch break period, we can use the given information.

Average number of students visiting the cafeteria during the lunch break: 200

Average number of students inside the cafeteria at any given time: 45

Average time spent by each student in the cafeteria: 20 minutes

To find the average time spent by a student in hours, we need to convert the minutes to hours.

There are 60 minutes in an hour.

Calculate the total time spent by all students inside the cafeteria: 45 students \(\times\) 20 minutes = 900 minutes.

Calculate the total time spent by all students, including those waiting outside the cafeteria: 200 students \(\times\) 20 minutes = 4,000 minutes.

Calculate the time spent by the average student inside the cafeteria: 900 minutes / 45 students = 20 minutes.

Calculate the average time spent by the average student in hours: 20 minutes / 60 minutes = 0.33 hours.

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The complete question may be like: During the two-hour lunch break period, on average, 200 students visit a school cafeteria. At any given time, there are, on average, 45 students inside the cafeteria, waiting to get their food or having lunch. Assuming each student spends an average of 20 minutes in the cafeteria, how long, in hours, does the average student spend in the cafeteria during the lunch break?

The value of the missing part of the triangle given above would be = 7.5. That is option A.

To calculate the missing length of the similar triangle, the formula listed below should be used.

That is;

a/a+b = c/c+d

where a = 8

b = 10

c = 6

d = ?

That is;

8/8+10 = 6/6+d

make d the subject of formula;

8(d+6) = 6(18)

8d +48 = 108

8d = 108-48

8d = 60

d = 60/8

d = 7.5

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Let's assume the amount invested at the higher interest rate (16%) is x dollars.

The amount invested at the lower interest rate (6%) would then be ($80,000 - x) dollars, as the total investment is $80,000.

The interest earned from the investment at 16% is calculated as (x * 16%) = 0.16x dollars.

The interest earned from the investment at 6% is calculated as (($80,000 - x) * 6%) = 0.06(80,000 - x) dollars.

According to the given information, the retiree receives a total interest of $8,900 per year. So we can set up the equation:

0.16x + 0.06(80,000 - x) = 8,900

Now, let's solve the equation to find the value of x:

0.16x + 0.06(80,000 - x) = 8,900

0.16x + 4,800 - 0.06x = 8,900

0.1x + 4,800 = 8,900

0.1x = 8,900 - 4,800

0.1x = 4,100

x = 4,100 / 0.1

x = 41,000

Therefore, $41,000 is being invested at the higher interest rate (16%).

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Answer:

slope = -6 and y intercept=0

Step-by-step explanation:

Good luckvsvsvsbsbsjsjhsbsbsbsb

Answer:

9 3/8 ounces of dog food

Step-by-step explanation:

1 cup = 1 7/8 ounces

1 7/8 + 1 7/8 = 2 14/8 = 3 6/8

3 6/8 + 1 7/8 = 4 13/8 = 5 5/8

5 5/8 + 1 7/8 = 6 12/8 = 7 4/8

7 4/8 + 1 7/8 = 8 11/8 = 9 3/8

Answer:

A = \(x^{2} +12x+27\)

Step-by-step explanation:

The area of a parallelogram is given by A=b*h where b is the base of the entire shape and h as the perpendicular distance between the bases.

In this case, b=x+9 and h=x+3

A = b*h = (x+9)*(x+3) = \(x^{2} +3x+9x+27\) = \(x^{2} +12x+27\)

Answer:

1312.5 minutes

Step-by-step explanation:

For her phone service, Lucy pays a monthly fee of $25, and she pays an additional $0.06 per minute of use. The least she has been charged in a month Is $103.72

What are the possible numbers of minutes she has used her phone in a month?

Use m for the number of minutes, and solve your inequality for m.

The term least = ≥ = greater than or equal to

Our inequality equation is given as:

$25 + $0.06 × m ≥ $103.72

25 + 0.06m ≥ 103.72

0.06m ≥ 103.72 - 25

0.06m≥ 78.75

m ≥ 78.75/0.06

m ≥ 1312.5 minutes

The possible number of minutes she used is 1312.5 minutes

Answer:

The values of \(a\) and \(b\) are \(5\) and \(-\frac{15}{7}\), respectively.

Step-by-step explanation:

There are mistakes in the statement, correct form is presented below:

\(5+\frac{\sqrt{3}}{7} + 2\sqrt{3} = a - b\cdot \sqrt{3}\).

By direct comparison we have the following system of equations:

\(a = 5\) (1)

\(\frac{\sqrt{3}}{7}+2\sqrt{3} = -b\cdot \sqrt{3}\) (2)

In (2) we solve for \(b\):

\(\left(\frac{1}{7}+2 \right)\cdot \sqrt{3} = -b\cdot \sqrt{3}\)

\(b = -\frac{15}{7}\)

The values of \(a\) and \(b\) are \(5\) and \(-\frac{15}{7}\), respectively.

Answer:

√(56 = x

Step-by-step explanation:

According to Euclidian theorem the square height of the triangle (x in this case) is equal to multiplation of the small base to the large base

14*4 = x^2

56 = x^2

√(56 = x

Growth rate

\(\\ \sf\longmapsto Distance/Time\)

\(\\ \sf\longmapsto 6/12\)

\(\\ \sf\longmapsto 0.5in/h\)

Answer:

Value of k is 9

Step-by-step explanation:

-2x + 8 = -10

-2x = -10 - 8

-2x = -18

x = -18/-2

x = 9

f(x) = f(k)

x = k

9 = k

Hello there!

We are given the function:

\( \displaystyle \large{f(x) = - 2x + 8}\)

We want to find the value of k. First, we know that f(k) is -10. We substitute x = k and f(x) = -10.

\( \displaystyle \large{f(k) = - 2k + 8} \\ \displaystyle \large{ - 10 = - 2k + 8}\)

Solving the equation. First, we subtract both sides by 8.

\( \displaystyle \large{ - 10 - 8 = - 2k +8 - 8} \\ \displaystyle \large{ - 18 = - 2k} \\ \)

Divide both sides by -2.

\( \displaystyle \large{ \frac{ - 18}{ - 2} = \frac{ - 2k}{ - 2} } \\ \displaystyle \large{ 9= k}\)

Therefore, k = 9

When we substitute k = 9 in f(k), the value is -10.

Let me know if you have any questions!

Topic: Linear Function

Answer:

.66

Step-by-step explanation:

Answer:

-3 < w < 8 or (-3, 8)

Step-by-step explanation:

Am i get it right?

Answer:

it is 8 -3 to the power of 5

Let V be the volume of the tank. The tap fills the tank at a rate of V/(4 hours), or V/4 per hour. The hole empties the tank at a rate of V per hour. If both the tap and hole work together, the net rate of water flow is V/4 - V or -3V/4 per hour.

Starting with a full tank, the volume v of water at time t is given by the function

v(t) = V + (-3V/4) t

Solve v(t) = 0 to find the time it takes to empty:

V - 3V/4 t = 0

V = 3V/4 t

t = V / (3V/4) = 4/3

So it takes 4/3 hours = 80 minutes to empty a full tank.

The camper should take 3 units of food, 1 first-aid kit, and 1 piece of clothing within the given constraints.

To determine the optimal number of each item the camper should take, we need to maximize the total benefit while considering the capacity constraint of the backpack.

Let's assume the camper takes x units of food, y first-aid kits, and z pieces of clothing.

The backpack has a capacity of 9 ft^3, and each unit of food takes up 2 ft^3. Therefore, the constraint for food is 2x ≤ 9, which simplifies to x ≤ 4.5. Since x must be a whole number and the camper needs at least one unit of food, the camper can take a maximum of 3 units of food.

Similarly, for first-aid kits, since each kit occupies 1 ft^3 and the camper must take at least one, the constraint is y ≥ 1.

For clothing, each piece takes 3 ft^3, and the constraint is z ≤ (9 - 2x - y)/3.

Now, we need to maximize the total benefit. The benefit of food is assigned as 7, first aid as 5, and clothing as 6. The objective function is 7x + 5y + 6z.

Considering all the constraints, the possible combinations are:

- (x, y, z) = (3, 1, 0) with a total benefit of 7(3) + 5(1) + 6(0) = 26.

- (x, y, z) = (3, 1, 1) with a total benefit of 7(3) + 5(1) + 6(1) = 32.

- (x, y, z) = (4, 1, 0) with a total benefit of 7(4) + 5(1) + 6(0) = 39.

- (x, y, z) = (4, 1, 1) with a total benefit of 7(4) + 5(1) + 6(1) = 45.

Among these combinations, the highest total benefit is achieved when the camper takes 3 units of food, 1 first-aid kit, and 1 piece of clothing.

Therefore, the camper should take 3 units of food, 1 first-aid kit, and 1 piece of clothing to maximize the total benefit within the given constraints.

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Answer:

1) 48

2)44

Step-by-step explanation:

Answer:  48 44 Are The Correct Answers

Step-by-step explanation:Hope This Helps

The percent of pizzas that are less than 12.04 inches is 56.36%

Given the following:

Mean, μ=12

Standard deviation, σ=0.25

Percent of pizzas less than 12.04:

Let P(X<12.04) be percent of pizzas less than 12.04

P(X<12.04)=P(Z<(x-μ)/σ)

               =P(Z<(12.04-12)/0.25)

               =P(Z<0.16)

Z-value of 0.16 from cumulative standardized normal distribution is 0.5636

Given that P(X<12.04)=P(Z<0.16), and P(Z<0.16) from normal distribution table is 0.5636,

P(X<12.04)=P(Z<0.16)=0.5636

P(X<12.04)=0.5636

                 =56.36%

Hence, the correct choice is 56.36%

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Answer:

B or D

Step-by-step explanation:

The value of x in the given diagram is 6 (option d).

There are two right triangles in the given image. <PR'Q' and <PQR are right triangles. A right triangle is a triangle that has an angle that measures 90 degrees.

The principle of similar triangles would be used to solve for the required values.

x/9 = 10 / 15

In order to determine the value of x, cross multiply:

15x = 9 x 10

15x = 90

Divide both sides of the equation by 15

x  = 90 / 15

x = 6

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The child passes through 18π radians in the course of the carousel ride.

To determine the number of radians the child passes during the 6-minute ride on the carousel, we need to know the distance traveled in terms of radians.

Since there are 20 horses spaced evenly around the carousel, each horse is separated by an angle of 360/20 = 18 degrees or π/10 radians.

Therefore, during one rotation of the carousel, the child passes through 20π/10 = 2π radians. And since the carousel completes one rotation every 40 seconds, the angular velocity is 2π/40 = π/20 radians per second.

To find the total distance traveled in radians during a 6-minute ride, we need to multiply the angular velocity by the time elapsed.

6 minutes is equal to 360 seconds,

so the child passes through π/20 x 360 = 18π radians during the ride.

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The next two terms of the sequence are 16 and 25.

Square root of a number is the value such that the value when multiplied to itself two times gives the original number.

It is denoted by the symbol √.

For example, square root of 16 is 4 since 4 × 4 = 16

Given the sequence 1, 4, 9.

We have to find the next two terms of the sequence.

1 = 1²

4 = 2²

9 = 3²

The next two terms will be the square of 4 and 5.

4² = 16

5² = 25

Hence the two terms next to the sequence are 16 and 25.

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If we let Z = 3 - X, then Z is another exponential random variable with mean 1 that is negatively correlated with X.

Let Y = 2 - X, where X is an exponential random variable with mean 1.

To show that Y is negatively correlated with X, we need to show that Cov(X,Y) < 0.

Cov(X,Y) = E[XY] - E[X]E[Y]

Since X and Y are both exponentially distributed with mean 1, we have:

E[X] = 1, E[Y] = 2 - E[X] = 1

E[XY] = E[X(2-X)] = 2E[X] - E[X^2] = 2 - Var(X)

Var(X) = E[X^2] - (E[X])^2 = 1 - 1^2 = 0

Therefore, Var(X) = 0, which means that E[XY] = 2, and Cov(X,Y) = E[XY] - E[X]E[Y] = 2 - 1*1 = 1 > 0.

Since Cov(X,Y) > 0, we know that Y is positively correlated with X. To find a random variable that is negatively correlated with X, we can use Y = 3 - X instead.

Therefore, if we let Z = 3 - X, then Z is another exponential random variable with mean 1 that is negatively correlated with X.

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a) Rocky Mountain should order 200 tires each time it places an order.

b) The total cost of this policy is $17,160.

a) To determine how many tires Rocky Mountain should order each time, we need to consider the different price levels and find the point where it is most cost-effective to order. Let's analyze the three price levels:

If fewer than 200 tires are ordered: The purchase price is $25 per tire.

If 200 or more, but fewer than 8,000 tires are ordered: The purchase price is $17 per tire.

If 8,000 or more tires are ordered: The purchase price is $13 per tire.

Since the ordering cost is $35 per order, it is most cost-effective to order the maximum quantity that falls within the second price level, which is 200 tires.

b) To calculate the total cost of this policy, we need to consider the ordering cost and the holding cost. The holding cost is 40% of the purchase price per tire per year. Let's calculate the total cost:

Total holding cost = (Purchase price per tire * Quantity ordered * Holding cost rate) / 2 = (($17 * 10,000 * 0.4) / 2) + (($13 * 2,000 * 0.4) / 2) = $34,000 + $5,200 = $39,200

Total cost = Total ordering cost + Total holding cost = (Ordering cost per order * Number of orders) + Total holding cost = ($35 * (10,000 / 200)) + $39,200 = $1,750 + $39,200 = $40,950

Therefore, the total cost of this policy is $40,950.

Rocky Mountain Tire Center should order 200 tires each time it places an order, resulting in a total cost of $40,950 for this policy. This ordering quantity and cost analysis allows Rocky Mountain to make efficient and cost-effective decisions in managing their inventory.

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To find the derivative of the function y(x) = ln(cosh(x) + √(cosh²(x) – 1)), we can use the chain rule.

Let’s begin by simplifying the expression inside the natural logarithm:

Cosh²(x) – 1 = (cosh(x))² - 1 = sinh²(x)

Now, let’s rewrite the function as:

Y(x) = ln(cosh(x) + √sinh²(x))

Taking the derivative, we have:

Dy/dx = d/dx [ln(cosh(x) + √sinh²(x))]

Applying the chain rule, we get:

Dy/dx = (1 / (cosh(x) + √sinh²(x))) * d/dx [cosh(x) + √sinh²(x)]

To find the derivative of cosh(x) + √sinh²(x), we differentiate each term separately:

d/dx [cosh(x)] = sinh(x)

d/dx [√sinh²(x)] = (1/2) * (2 * sinh(x)) = sinh(x)

Therefore, the derivative of cosh(x) + √sinh²(x) is sinh(x) + sinh(x) = 2sinh(x).

Plugging this back into our previous expression, we have:

Dy/dx = (1 / (cosh(x) + √sinh²(x))) * 2sinh(x)

Simplifying further:

Dy/dx = 2sinh(x) / (cosh(x) + √sinh²(x))

So, the derivative of y(x) = ln(cosh(x) + √(cosh²(x) – 1)) is dy/dx = 2sinh(x) / (cosh(x) + √sinh²(x)).


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