Can someone help me with this please?

Answer:

Step-by-step explanation:Answer: 108,000m/h (108km/h or 30m/s)

Answer:

Step-by-step explanation:

Answer: $195.70

Step-by-step explanation:

Answer:

Step-by-step explanation:

The solution of linear system of equations is the point of intersection of the lines.

Closer view of the graph gives us the point ( - 2, 6 ). See the attached.

Add vertical and horizontal lines from the point of intersection and take the closest values to the integer numbers on the x-axis and the y-axis. The numbers are -2 on the x-axis and 6 on the y-axis, therefore the answer is (- 2, 6).

The matching choice is B.

Answer:

Ima say 2017

Step-by-step explanation:

Answer:

31

Step-by-step explanation:

The solution of expression 20 divided by cos70° is,

⇒ 20 divided by cos70° = 58.82

We have to given that,

A number 20 divided by cos70°.

We can simplify the expression as,

20 divided by cos70°

⇒ 20 ÷ cos 70°

⇒ 20 / cos 70°

⇒ 20 / 0.34

⇒ 20 x 100 / 0.34x100

⇒ 2000/34

⇒ 58.82

Therefore, The solution of expression 20 divided by cos70° is,

⇒ 20 divided by cos70° = 58.82

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Answer:

f(x) = |x-3| + 5

Answer: r = 77.3 degrees

Step-by-step explanation:

-Add both numbers together.

- 46.2

+ 31.1

= 77.3

-That is the value of "r".

Answer:

x + 1

Step-by-step explanation:

75+n2+n3...+..77..+..n99++

Difference = 76-75=1

x + 1

Where x is the chosen/inital number.

Economic equilibrium is a condition or state in which economic forces are balanced. In effect, economic variables remain unchanged from their equilibrium values in the absence of external influences.

Economic equilibrium is also referred to as market equilibrium. Economic equilibrium is the combination of economic variables (usually price and quantity) toward which normal economic processes, such as supply and demand, drive the economy. The term economic equilibrium can also be applied to any number of variables such as interest rates or aggregate consumption spending. The point of equilibrium represents a theoretical state of rest where all economic transactions that “should” occur, given the initial state of all relevant economic variables, have taken place.

In a competitive market, demand for and supply of a good or service determine the equilibrium price.

MARKETS:

Equilibrium is achieved at the price at which quantities demanded and supplied are equal. We can represent a market in equilibrium in a graph by showing the combined price and quantity at which the supply and demand curves intersect.

For example, imagine that sellers of squirrel repellant are willing to sell 500 units of squirrel repellant at a price of $5 per can. If buyers are willing to buy 500units of squirrel repellent at that price, this market would be in equilibrium at the price of $5 and at the quantity of 500 cans.

Whenever markets experience imbalances—creating disequilibrium prices, surpluses, and shortages—market forces drive prices toward equilibrium.

A surplus exists when the price is above equilibrium, which encourages sellers to lower their prices to eliminate the surplus.

A shortage will exist at any price below equilibrium, which leads to the price of the good increasing.

For example, imagine the price of dragon repellent is currently $6 per can. People only want to buy 400 cans of dragon repellent, but the sellers are willing to sell 600 cans at that price. This creates a surplus because there are unsold units. Sellers will lower their prices to attract buyers for their unsold cans of dragon repellant.

Changes in the determinants of supply or demand result in a new equilibrium price and quantity. When there is a change in supply or demand, the old price will no longer be an equilibrium. Instead, there will be a shortage or surplus, and price will subsequently adjust until there is a new equilibrium.

For example, suppose there is a sudden invasion of aggressive unicorns. There will be more people who want to buy unicorn repellent at all possible prices, causing demand to increase. At the original price, there will be a shortage of unicorn repellant, signaling sellers to increase the price until the quantity supplied and quantity demanded are once again equal.

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The correct value for the precision is found to be  0.0013 for the survey.

The formula for finding the precision  is-

Precision = E(closure)/ Perimeter

E(closure) = √(ed)² + (el)²

Where,

error in latitude (el) = 0.82 ft

error in departure (ed) = 0.35 ft.

Perimeter = 684.5 ft.

Find the E(closure)

E(closure) = √(0.82)² + (0.35)²

E(closure) = 0.89

Precision = 0.89/684.5

Precision = 0.0013

Thus, the correct value for the precision is found to be  0.0013 for the survey.

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Answer:

90 degrees is the amount of degrees in a right angle

Answer:

D, 3216

Step-by-step explanation:

Calculators are great. I love calculators.

The correct answer is Option B. Parameters are defined as a group of numerical characteristics of a population.

Parameters are generally the numbers or values that represent the whole population's numerical characteristics. There is a difference between Statistics and Parameters.

Statistics is generally defined as the numerical characteristics of a sample. For example, a sample of standard mean or a sample of standard deviation is an example of statistics.

Parameters are the numerical representation of the characteristics of a population. For example, Population mean or Population standard deviation are examples of Parameters. These represent the data or the characteristics of the population in numerical.

Hence, the correct answer is Option B.

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The correct answer is Parameters are described as a group of numerical characteristics of a population.

In general, Parameters are the numerical values that represent the entire population's numerical characteristics. There is a variation between Statistics and Parameters. Statistics are defined as the numerical characteristics of a sample. A sample of standard mean deviation or a sample of standard deviation are examples of statistics.

               Parameters are the numerical portrayal of the characteristics of a population.  Population mean deviation or Population standard deviation are examples of Parameters. These depict the information or the characteristics of the population in a numerical way.

Hence, the correct answer is Parameters are described as a group of numerical characteristics of a population.

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The system of inequalities for this situation are

Cost inequality = $4x + $6y ≤ $100

Time inequality = 30x + 60 ≤ 900

And  the retailer should make 10 single layer and 10 2-layer mask by using the available time and cost.

System of inequalities

When two or more algebraic expressions are compared using the mathematical symbols like <, > ≤, or ≥, then they form an inequality. They are the mathematical expressions in which both sides are not equal.

Given,

A retail store manager makes cotton cloth facemasks for his employees during Covid. He has enough money to buy $100 worth of fabric. Fabric costs $4 for a single layer mask and $6 for a mask with 2 layers of fabric. It takes him 30 minutes to make a single layer mask and 1 hour to make double layer mask. He only has 15 hours available to work on masks. He wants to maximize his time and resources.

Here we need to find the system of inequalities and we also need to find each type of mask should he make.

Let us consider x be the number of single layer mask and y be the number of 2 layer mask.

Then based on the given cost, the cost inequality is written as,

$4x + $6y ≤ $100.

Here we know the time taken for each mask making, so, in the inequality form, it can be written as,

We know that,

1 hour = 60 minutes

So, 15 hours = 900

Therefore, the inequality of time is written as,

30x + 60 ≤ 900

While we plot these values on the graph then we get the graph like the following,

Here the blue line represent the time inequality and the red line represents the cost inequality.

Through the given graph, we have identified that the retailer should make 10 single layer and 10 2 layer mask by using the available time and cost.

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If the original price of the radio is 2,400 Naira and it is reduced by one third, then the discounted price is 1,600 Naira.

A store usually provides discount of some items to attract more customers and make greater sales.

Suppose the original price is p, the discount rate is d%, and the discounted price is q, then the discounted price can be calculated as:

q = (1 - d%) x p

Parameters given in the problem:

p = 2,400 Naira

d = 1/3

Hence,

q = (1 - 1/3) x 2400

q = 2/3 x 2400 = 1600

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The algebraic expression is C(5) =2.5 * 5 + 1.4 and the total cost is $13.9

From the question, the equation of the total sales amount is given as

Equation = 2.3q + 1.4

Where q represents the number of days

Rewrite as

Cost = 2.3q + 1.4

Express the equation as a cost function

So, we have the following representations

C(q) = 2.3q + 1.4

When the number of days is 5, we have

q = 5

Substitute the known values in the above equation So, we have the following equation

C(5) =2.5 * 5 + 1.4

Evaluate the products

C(5) = 12.5+ 1.4

Evaluate the sum

C(5) = 13.9

Hence, the total cost for the 5 days is $13.9

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Graph for the equation ( y = -300x +  1200 ) below

y-intercept = ( 0, 1200 )

x-intercept = ( 4, 0 )

Hope this helps! :)

The y-intercept is ( 0, 1200 ) and the x-intercept is ( 4, 0 ).

The graph is simply a structured representation of the data. It aids in our comprehension of the data. The numerical information gathered through observation is referred to as data.

In a line graph, the information or data is represented as a series of markers, or dots, and is then connected to one another by a straight line.

Given:

y=-300x+ 1200

Now, for y- intercept put x=0

y= 1200

and, for x- intercept put y= 0

0 = -300x +1200

x= 4

Hence, the y-intercept is ( 0, 1200 ) and the x-intercept is ( 4, 0 ).

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Answer:

D.4y−x=4

Step-by-step explanation:

Perpendicual lines have a slope that is the negative inverse of the referenced line.  The reference here is:

       y = -4x-5

The slope is -4

The negative inverse of -4 would be +(1/4).  Any line that has a slope of +(1/4) will be perpendicular to y=-4x+5.

The equations in the answer options are not arranged according to the standard format of y=mx+b, where m is the slope and b the y-intercept.

We could graph all the equations and look for the one(s) that are perpendicualr, but it might be safer, and faster, to rearrange them in the standard format, and then note the slope:

                                  Slope     =+(1/4)?

A. x+4y=-32  

    4y= -x-32

     y = -(1/4)x-8        -(1/4)           NO

B.4x+y=3

     y = -4x + 3            -4                NO

C.4x−y=−4

     y = 4x + 4             4                 NO

D.4y−x=4              

     4y=x+4               +(1/4)      <==YES

      y=(1/4)x+1    [Option D has a slope of +(1/4).  It will be perpendicular]

See the attached graph.

Answer:

2 swimming pool lengths

Step-by-step explanation:

to answer this we divide 1/2 by 1/4

1/2/1/4

1/2x4/1=4/2

2 swimming pool lengths

hopes this helps please mark brainliest

Answer:

both a and b

Step-by-step explanation:

It is because in the elimination method it does not matter whether you eliminate x or y so if you use option a which multiplies -2 by 1st equation so it will become:

-4x+6y=40

4x+6y=8

so the -4x and 4x cancels and a is a valid option.

If you use the b which multiplies the second with 3 it becomes:

2x-3y=-10

4x+3y=24

so -3y and 3y cancel which also makes this a valid option.

Answer: both a and b

The length of one of the legs of the triangle is 65 units.

An isosceles triangle has a base length of 126 units and a height of 16 units. We need to find out the length of one of the legs of the triangle.

First of all, we will consider a perpendicular bisector of the triangle. This divides the given triangle into two equal right-angled triangles. Now, in the smaller triangle, we will use the Pythagorean theorem.

Let the length of the leg be represented by the variable "x". The length of the base of the right-angled triangle is half the length of the base of the original triangle.

x² = (16)² + (126/2)²

x = √(256 + 3,969)

x = √4,225

x = 65

Hence, the length of one of the legs of the triangle is 65 units.

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The value of z is given by (b) z = 63.

According to Angle Sum Property, the sum of interior angles of a triangle is 180 degree.

So for left hand triangle, interior angles are 31, 61 and x. So,

31 + 61 + x = 180

92 + x = 180

x = 180-92

x = 88

Now x and y are the linear angles so their sum is 180 degree too.

x + y = 180

88 + y = 180

y = 180-88 = 92

Again for right hand triangle the interior angles are 25, y, z. So again by Angle Sum Property,

25 + y + z = 180

25 + 92 + z = 180

117 + z = 180

z = 180-117 = 63

Hence the value of z is 63.

So the correct option is (b).

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The level of a independent variable known to as the "Control group" is designed to portray a neutral state.

The cause is the independent variable. Its value is unaffected by the other study variables.

You plan a study out whether variations in the room's temperature have an impact on students' math test results.

Consequently, "control group" refers to a level of such an independent variable that is meant to stand in for "no treatment" or a neutral circumstance.

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The number of 20 button bags are 2.

Given that, Gassama buys some bags of buttons there are 20 buttons or 21 buttons or 22 buttons or 23 buttons in each bag.

Frequency refers to the number of times an event or a value occurs. A frequency table is a table that lists items and shows the number of times the items occur.

Here,

Number of 20 buttons = 20×x=20x

Number of 21 buttons = 21×5=105

Number of 22 buttons = 22×3=66

Number of 23 buttons = 23×3=69

Total = 20x+105+66+69

20x+105+66+69=280

⇒ 20x+240=280

⇒ 20x=40

⇒ x=2

Therefore, the number of 20 button bags are 2.

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Given the graph, the vertex does not exist and the transformations from are

The graph represents the given parameter

In the above graph, we can see that the graph is a cubic function

By definition, cubic functions do not have vertex. This is because they have no minimum or maximum

So, we can conclude that the graph has no vertex

In (a), we have

We can see that the graph is a cubic function

This function is represented as

y = ∛x

In this graph, we can see that the graph is 4 units to the left

i.e. y = ∛(x - 4)

And 2 units below the origin

i.e. y = ∛(x - 4) + 2

So, the transformation is (b) and (c)

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Answer:

It is not a right triangle.

Step-by-step explanation:

If the triangle were a right triangle, then the Pythagorean theorem would apply.

The Pythagorean theorem says: [tex]A^{2} + B^{2} = C^{2}[/tex]

If A = 10, B = 16, and C = 20, then [tex]10^{2} + 16^{2} = 20^{2}[/tex].

[tex]10^{2} + 16^{2} = 100 + 256 = 356[/tex]

[tex]20^{2} = 400[/tex]

In conclusion, [tex]356 \neq 400[/tex], so this triangle is not a right triangle.

Answer: b

Step-by-step explanation:

Answer:

He will save 1 cent per pound if he buys the Sweet Sugar brand