please help meeeeeeeeeee

Answer:

5 pounds

Step-by-step explanation:

$20/$4 = 5 pounds

HOPE IT HELPS!

Let b be the initial number of boys, and let g be the initial number of girls. We know that the total number of students at the canteen is 342, so:

b + g = 342

After 51 boys and an equal number of girls returned to their classroom, there were three times the number of boys than girls in the canteen. This means that the number of girls remaining in the canteen is:

g - 51

And the number of boys remaining in the canteen is:

b - 51

Since there were three times as many boys as girls, we can write:

b - 51 = 3(g - 51)

Now we have two equations and two unknowns. We can solve for one variable in terms of the other in the first equation, and substitute into the second equation:

b + g = 342

g = 342 - b

b - 51 = 3(g - 51)

b - 51 = 3(342 - b - 51)

b - 51 = 3(291 - b)

b - 51 = 873 - 3b

4b = 924

b = 231

So there were 231 boys in the canteen at first. To check our answer, we can substitute into the first equation:

b + g = 342

231 + g = 342

g = 111

Therefore, there were 231 boys and 111 girls in the canteen at first.

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Answer:

Step-by-step explanation:

twelve triangles make 2 hexagons, which means there are 12 groups of in 2

The length and width of a rectangle is Positively correlated variables and the base and height of a triangle is negativley correlated variables.

In mathematics, there are many examples of variables that can be positively or negatively correlated. Here are two examples:

a. Positively correlated variables: The length and width of a rectangle. If you increase the length of a rectangle, the width tends to increase as well. So, there is a positive correlation between the length and width of a rectangle.

b. Negatively correlated variables: The base and height of a triangle. If you increase the base of a triangle, you can keep the area the same by decreasing the height, and vice versa. So, there is a negative correlation between the base and height of a triangle.

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The average rate of change is 2.The rate of change of the function is its gradient or slope.

To get the average rate of change, divide the change in y-values by the change in x-values.Knowing the average rate of change is necessary to detect changes in observable metrics like average speed or average velocity.

It displays the typical rate of change of the function for each unit during that time. It is determined using the slope of the line connecting the ends of the interval in the function graph.

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Answer: B quadrant 2 or quadrant 3  

Step-by-step explanation:

In the linear equation y=2x+3, if x increases by 4 points, the y will increase by 8 points.

An equation is said to be linear if the maximum power of the variable is consistently 1. Another name for it is a one-degree equation. A linear equation's graph will always be a straight line. A linear equation is expressed using the linear equation formula. There are numerous ways to accomplish this. A linear equation, for instance, can be written in standard form, slope-intercept form, or point-slope form. 

According to that,

y=2x+3 is the linear equation.

x will now rise by 4 points.

According to the data given, the calculation is as follows:

x = x + 4

So = 2(x)

= 2(x + 4) + 3

= (2x + 3) + 8

= y + 8

Eight points should be added to the y.

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The system of the equations are:

y = 10 + 4x

y = 25 + x

The height of tree is 30 inches tall.

The graph is given below.

The solution is (5, 30).

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example:

2x + 4 = 8 is an equation

We have,

Maple tree:

The maple tree that is 10 inches tall is

growing 4 inches per month,

This can be written as,

y = 10 + 4x _____(1)

Where y is the height of the tree.

Oak tree:

The oak tree is 25 inches tall and is growing 1 inch per

month.

This can be written as,

y = 25 + x ______(2)

Where y is the height of the tree.

Now,

From (1) and (2),

In a few months, the two trees will be the same height.

So,

10 + 4x = 25 + x

4x - x = 25 - 10

3x = 15

x = 5

Now,

y = 10 + 4x = 10 + 4 x 5 = 10 + 20 = 30

y = 25 + x = 25 + 5 = 30

Thus,

The height of tree is 30 inches tall.

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a. 1 hour and 45 minutes for the bacteria population to double.

To find out how long it takes for the bacteria population to double, we need to solve the equation:

2p(0) = p(h)

where p(0) is the initial population and h is the time it takes for the population to double.

Since p(h) = [tex]1000e^{(0.4h)}[/tex], we can write:

2p(0) = [tex]1000e^{(0.4h)}[/tex]

Dividing both sides by 1000, we get:

2p(0)/1000 = [tex]e^{(0.4h)}[/tex]

Taking the natural logarithm of both sides, we get:

ln(2p(0)/1000) = 0.4h

Solving for h, we get:

h = ln(2p(0)/1000) / 0.4

We know that p(0) = 1, since the initial population is given as 1,000. Substituting this value, we get:

h = ln(2) / 0.4

h ≈ 1.73

So it takes approximately 1.73 hours for the bacteria population to double.

Rounding to the nearest quarter of an hour.

we get:

h ≈ 1.75 hours

h ≈ 1 hour and 45 minutes

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As per the density the probability that a density measurement of the post-1982 pennies is 0.3565 g/cm3.

Density is an important physical property that can help identify materials. In this case, we are interested in the density of zinc and how it relates to the post-1982 pennies.

To calculate the probability of a density measurement within 5% of the density of zinc, we need to first determine the range of densities that fall within 5% of the zinc density.

The 5% range of the zinc density is calculated by multiplying the zinc density (7.13 g/cm3) by 5% (0.05), which gives us 0.3565 g/cm3.

The upper and lower limits of this range are then calculated by adding and subtracting this value from the zinc density, respectively.

The upper limit is 7.4865 g/cm3 (7.13 + 0.3565),

while the lower limit is 6.7735 g/cm3 (7.13 - 0.3565).

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PLEASE GIVE BRAINLIEST!

thank you and have a good day :)

Answer:

b^5

Step-by-step explanation:

When you are multiplying exponents with the same letter base, you simply just add the exponents.

for example, x^2 * x^3 = x^5

another example, y^6 * y^8 = y^14

An expression equivalent to b^3 * b^2 would be b^5

I hope this helps!

Answer: 0.342 -> 0.394 -> 0.439 -> 0.441 -> 0.531

Step-by-step explanation:

0.342 -> 0.394 -> 0.439 -> 0.441 -> 0.531

If you convert the decimals into fractions out of a hundred, then it will be easily to keep going from least to greatest or greatest to least and soon you won't need help. Keep trying! :)

Exponential growth is a pattern of data that shows a rapid increase over time, while exponential decay is a pattern of data that shows a rapid decrease over time.

An rise in the resultant quantity for a given quantity is referred to as exponential growth, and a decrease in the resultant quantity for a given quantity is referred to as exponential decay.

The fundamental distinction between the two is that in an exponential decay relationship, the output values rise quickly as the input value rises, whereas in an exponential growth relationship, the output rises noticeably faster as the input value rises.

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The value of t is 6.5. The value of the constant is 60

What varies directly?

The relationship between two variables in which one is a constant multiple of the other is referred to as direct variation. For instance, two variables are said to be in proportion when one affects the other. b = ka is the equation if b is directly proportional to a. (where k is a constant).

Given that  d varies directly as t.

The relation between d and t is

d = kt.

Given that d = 180 when t = 3.

Putting d = 180 and t = 3 in d = kt

180 = 3k

Divide both sides by 3:

k = 180/3

k = 60

Putting k = 60  in d = kt:

d = 60t

Now putting d = 390 in d = 60t:

390 = 60t

60t = 390

Divide both sides by 60

t = 6.5

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The slope of A'B' is 0 and the length of A'B' is 1/4(5) = 1.25 units.

A point, line, or geometric figure can be transformed in one of four ways, each of which affects the shape and/or location of the object. Pre-Image refers to the object's initial shape, and Image, after transformation, refers to the object's ultimate shape and location.

The line AB has the following coordinates.

A = (1, 4)

B = (6, 4)

The distance between AB is given as:

AB = √(6 - 1)² + (4 - 4)²

AB = √(5)²

AB = 5

The slope of AB = 0.

For the dilated rectangle the slope remains the same.

The slope of A'B' is 0 and the length of A'B' is 1/4(5) = 5/4 = 1.25 units.

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The correct question is:

The simplest fraction form of an expression, (- 2/3) - (-1/2) is equals to the -1/6.

A fraction is a number that represents a part of whole. It is expressed as quoitent, in which numerator is divided by denominator. For ex : 3/4 is a fraction, where 3 is numerator and 4 is denominator. We have an expression, (- 2/3) - (-1/2). This expression is substraction of two rational number and both are negative rational numbers. Using sign law of multiplication: - × - = + , i.e., multiplation of two negative numbers result positive number.

=> - 2/3 + 1/2

Both fraction has different denominators. Write as least common multiple of 2 and 3, i.e., LCM(2,3)= 6

=> ( -2 × 2 + 3 )/6

Simplify the expression as possible

=> (- 4 + 3 )/6

=> - 1/6

This is the needed simplified fraction. Hence, The solution in simplest fraction is -1/6.

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8-3√11 is the expression which is equivalent to √11+√64-2√44.

The combination of variables, numbers and operators is called as expression.

The given expression is √11+√64-2√44

Square root of 11 plus square root of sixty four minus two square root of forty four.

Let us find the equivalent expression of √11+√64-2√44

The expressions in which the expressions look different but have save same value are Equivalent

√11+√64-2√44

√11+8-2√4×11

√11+8-4√11

Combine like terms

8-3√11

Hence, 8-3√11 is the expression which is equivalent to √11+√64-2√44.

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Which expression is equivalent to √11+√64-2√44

A. 8-4√44

B. 5√3-4√11

C. 8-3√11

Answer:

9.09%

(⬇Read my notes⬇)

Notes:

Hi there,

I know this answer is going to be incorrect on RSM, but it is the correct answer. Everyone has been saying that it's 9.09%, and I even found that as well. So I don't know why RSM is saying that it's wrong, because it should be correct.

- 201600823

Step-by-step explanation:

the radius of the circular base is 7/2=3.5 cm

the surface of the base is πr^2=π*(3.5)^2=38.465

volume of the cylinder is surface of the base*high

38.465*30=1153.95

the cuboid volume=8^2*x=64x

64x=1153.95

x=1153.95/65=18.03 cm=18 cm

Answer: A parabola can be defined as the set of all points that are equidistant from a focus and a directrix. Based on the information provided, the focus of the parabola is (0, 4) and the directrix is y =.

The parabola will open upwards or downwards depending on the location of the focus and the directrix. Since the focus is at (0, 4), and the directrix is at y =, the parabola must open upwards. The axis of symmetry of the parabola will pass through the focus and will be perpendicular to the directrix.

Without more information, it is not possible to fully determine the shape and equation of the parabola. The shape of the parabola and its equation can be found by using the focus and directrix and other information, such as the vertex or a point on the parabola.

Step-by-step explanation:

For given geometrical shape, The angles which we need to find are  ∠z=115° and y=21.

What are geometric shapes, exactly?

Geometric shapes are mathematical figures that reflect the shape of objects we see in our daily lives. Shapes are geometric shapes that have boundary lines, angles, and surfaces. There are several types of 2d and 3d shapes.

Shapes are also classified according to their regularity or homogeneity. A symmetrical regular form, such as a square or circle, is common. Asymmetry can take on irregular shapes. They're also referred to as organic forms or freeform shapes. A tree, for example, has an irregular or organic shape.

In plane geometry, two-dimensional forms are flat shapes and closed figures such as circles, squares, rectangles, rhombuses, and so on. In solid geometry, the three-dimensional shapes are the cube, cuboid, and sphere.

Now,

In given figure ∠z+65°=180°    (Sum of two interior angles)

then ∠z=115°

and ∠z=∠6y-11   (vertically opposite angles)

6y-11=115

6y=126

y=21

Hence,

           For given geometrical shape, ∠z=115° and y=21.

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Answer:

Let a be the first term and d be the common difference.

3rd term = 1407

a+2d = 1407  ------- 1

10th term = 1183

a+9d = 1183  ------- 2

By solving 1 and 2, a = 1471 and d = -32

so the general term T(n) = 1471 + (n-1)(-32)

                                          = 1471 - 32n +32

                                          = -32n + 1503

-32n + 1503 [tex]\geq[/tex] 0

            -32n [tex]\geq[/tex] -1503

                  n [tex]\leq[/tex] 46.96875

The number of positive terms = 46

Step-by-step explanation:

45g = 0.045kg

0.045 + 26 = 26.045

Final answer is 26.045 kg

Using, the mathematical inequalities, we can conclude that the total number of occupied rooms on Friday is 10.

Number of rooms in the inn = 10

It is given that One-half of the rooms are reserved for Friday which means 5 rooms were initially reserved on Friday.

Now, 12 more rooms are reserved for Friday.

So, the Initial reservation for Friday = 5

Final reservations for Friday = 5 + 12 = 17

Now, Final reservations for Friday(17) > Total number of rooms in the inn(10).

As the reservation exceeds the capacity of the hotel, 7 reservations will be cancelled and all 10 rooms will be occupied on Friday.

Hence, the total number of occupied rooms on Friday is 10.

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Answer: Correct answer is -1

Step-by-step explanation:

====================================================

Work Shown:

n = number of nickels

22-n = number of dimes

5n = value of the nickels in cents

10(22-n) = value of the dimes in cents

5n+10(22-n) = total value in cents

5n+10(22-n) = 180

5n+220-10n = 180

-5n+220 = 180

-5n = 180-220

-5n = -40

n = -40/(-5)

n = 8 is the number of nickels

22-n = 22-8 = 14 is the number of dimes

-----------------

Check:

8 nickels = 8*5 = 40 cents

14 dimes = 14*10 = 140 cents

8 nickels + 14 dimes = 40 cents + 140 cents = 180 cents = $1.80

8 nickels + 14 dimes = 22 coins total

The answers are confirmed.

As per unitary method, you'll earn $9.50 by selling five magazine subscriptions.

The unitary method is a method of finding a single value of a quantity or unit, given the value of a unit of the same quantity. In this case, we need to find out how much money you'll earn by selling magazine subscriptions.

We know that for selling the first subscription, the magazine company will pay you $1.50. For each additional subscription sold, the magazine company will pay 20 cents more than what was paid for the previous subscription.

Let's use the unitary method to find out how much you'll earn by selling the second subscription.

The magazine company pays 20 cents more than $1.50 for the second subscription. Therefore, the payment for the second subscription is

=> $1.50 + $0.20 = $1.70.

Using the same method, we can calculate the payment for the third subscription, which is

=> $1.70 + $0.20 = $1.90.

Similarly, we can use the unitary method to calculate the payment for the fourth, fifth, and so on, subscriptions.

By adding up the payments for each subscription, we can calculate your total earnings. Let's assume you sold five subscriptions.

The payment for the first subscription is $1.50, for the second subscription, it's $1.70, for the third subscription, it's $1.90, for the fourth subscription, it's $2.10, and for the fifth subscription, it's $2.30.

Total earnings = $1.50 + $1.70 + $1.90 + $2.10 + $2.30 = $9.50.

Therefore, you'll earn $9.50 by selling five magazine subscriptions.

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There will be 36.6 trees per acre after 4½ years from the end of the 5-year observation period. The solution has been obtained by using unitary method.

What is the unitary method?

The value of each individual unit is first determined using the unitary method, and only then is the value of the required number of units determined.

We are given that at the beginning of their observations, there was an average of 48 trees per acre. At the end of the 5-year period, there was an average of 42 trees per acre.

So, decline in trees per acre in 5 years is 48 - 42 = 6 trees per acre

So, decline in 1 year = 6/5 = 1.2 trees per acre

Similarly, decline in 4.5 years = 1.2 * 4.5 = 5.4 trees per acre

Thus, trees left per acre = 42 - 5.4 = 36.6 trees

Hence, there will be 36.6 trees per acre after 4½ years.

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The solution to the given system of equation is (-2,7) and (2, -1).

A system of equations are the set of equations where the solution for these equations are the intersecting point between the equations.

The graph denotes the two equations in which one is line and another one is parabola.

These system equation has two solutions.

That is, the point where the curve and line intersect is the solution for the system.

In this graph, the line and the curve intersects at two points,

i.e., (-2,7) and (2, -1).

Hence, the solution to the given system of equation is (-2,7) and (2, -1).

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