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Algebra

The use of letters to substitute unknown numbers to form an equation. Solve the equation to get the unknown number using different methods such as simultaneous equations and more.

227,579 Questions

What is 64 negative two third power?

To calculate (64) raised to the power of (-\frac{2}{3}), you first take the cube root of (64) and then square the result. The cube root of (64) is (4) (since (4^3 = 64)). Squaring (4) gives (16), and since the exponent is negative, we take the reciprocal, resulting in (\frac{1}{16}). Therefore, (64^{-\frac{2}{3}} = \frac{1}{16}).

What is x2-7x-18 in factored form?

The expression (x^2 - 7x - 18) can be factored by finding two numbers that multiply to -18 and add to -7. These numbers are -9 and 2. Thus, the factored form of the expression is ((x - 9)(x + 2)).

What is where the line crosses the vertical axis?

The point where a line crosses the vertical axis is called the y-intercept. It represents the value of the dependent variable when the independent variable is zero. Mathematically, it is often denoted as ( b ) in the slope-intercept form of a linear equation, ( y = mx + b ), where ( m ) is the slope of the line. The y-intercept is a key point for graphing linear equations.

Why a coefficient of discharge is necessary?

A coefficient of discharge is necessary to account for the differences between ideal flow conditions and real-world flow behavior in hydraulic systems. It quantifies the efficiency of flow through an orifice or vent, taking into consideration factors like turbulence, viscosity, and geometry. By providing a correction factor, it allows engineers to accurately predict flow rates and design systems that operate effectively under varying conditions. Ultimately, it ensures more reliable and efficient water management in applications such as irrigation, drainage, and water supply.

In the diagram what is the value of x?

I'm sorry, but I cannot see diagrams or images. If you can describe the diagram or provide the relevant details, I'd be happy to help you solve for x!

How are rational expressions used in engineering?

Rational expressions are commonly used in engineering to model and analyze relationships between variables, particularly in fields such as fluid dynamics, control systems, and circuit design. They help engineers represent ratios of quantities, such as voltage, current, and resistance in electrical circuits, allowing for simplified calculations and system optimization. Additionally, rational expressions facilitate the assessment of performance metrics and design parameters, aiding in the development of efficient engineering solutions.

How can you use graphs and equations to identify linear functions?

Graphs of linear functions display a straight line, indicating a constant rate of change between the variables. The equation of a linear function is typically in the form (y = mx + b), where (m) represents the slope and (b) is the y-intercept. To identify a linear function, you can check if the graph is a straight line or if the equation can be rearranged into the linear form. Additionally, the differences between consecutive y-values divided by the differences in x-values (rise over run) should remain constant.

What is the 3x table up to 1000x3?

The 3x table up to 1000 consists of the multiples of 3 from 3 to 3000. It includes numbers such as 3, 6, 9, 12, ..., and continues in increments of 3. The sequence can be expressed as 3n, where n is a positive integer from 1 to 1000. The last number in this table is 3000.

How is the initial value represented in a table and function?

In a table, the initial value is typically represented as the first entry in the dependent variable's column, often corresponding to the input value of zero. In a function, the initial value is indicated by the function's output when the input is zero, which is the y-intercept in a linear function. For example, in the function ( f(x) = mx + b ), the initial value is represented by the constant ( b ).

What choice is equivalent to the quotient shown here when x 0?

It seems that your question is incomplete, as the specific quotient you're referring to is not provided. To determine an equivalent choice for a given quotient involving (x), please include the full expression or quotient you want to analyze. Once provided, I can help simplify or identify equivalent expressions.

What is set of output of a function called?

The set of outputs of a function is called the "range." It consists of all possible values that the function can produce when the inputs from the domain are applied. In mathematical terms, if a function maps elements from a set (domain) to another set, the range includes all the resulting output values.

What is function of corbel?

A corbel is a structural element that projects from a wall to support a load, such as a beam or arch. It is often used in architecture to provide strength and stability, allowing for overhanging structures or decorative features. Corbels can be made from various materials, including stone, wood, or metal, and are frequently employed in both functional and ornamental designs. Their design can also enhance the aesthetic appeal of a building or structure.

What is x in -x3?

To isolate ( x ) in the equation (-x = 3), you would multiply both sides by -1. This gives you ( x = -3 ). Therefore, the value of ( x ) is (-3).

How do you solve 3x 5 26?

To solve the equation (3x + 5 = 26), start by isolating the term with (x). Subtract 5 from both sides to get (3x = 21). Then, divide both sides by 3 to find (x = 7).

Why is Pi used to calculate circumference and area of circles?

pi is an irrational number at 3.141592.... ( recur to infinity and decimals in no regular order.

Let me tell you a story!!!!

It was found by the 'Ancient Civilisations' that when a donkey is used to drive up water from well, it was tethered to a rope/halter, the radius. It walked round the well head tied to the halter. in a big circle, the circumference.

It was found by the ancients, that twice the radius, the diamter, has a direct proportion to the circumference.

It didn't how big/small the circumference was, compared to the radius/diameter the proportion always remained the same at 3.141592.... (pi).

So the ancints constructed an equation.

C is directly proportional to diameter ,d,

This proportion is always constant hence a 'k' for constancy is inserted.

C = kd

or

k = C/d

This constant 'k' was given the name 'pi', which is the lower case Classical Greek letter 'p'. and stands for proportion.

So ther you have it!!!!!

A circle has a radius of 7inches what is the the circle's circumference?

Remember and commit to memory.

C = 2 pi r or C = pi d

A = pi r^(2)

Where C = Circumference

A = Area

pi is a constant at 3.1416

r = is the radius

d is the dianter ; 2r = d

r^(2) = r x r = 'r' squared.

So selecting r = 7 inches

Then C = 2* (3.1416)* 7

C = 14*3.1416

C = 43.98229....

C ~ 43.99 inches.

NB In school you may be given pi =

pi = 3.14, 3.1416, 22/7

These are only approximations, but given for ease of calculating.

pi = 3.141592.... Is an irrational number and the decimals recur to infinity, AND are in no regular numerical order.

What is the exponents of 12?

The term "exponents of 12" can refer to the different ways to express 12 as a power of its prime factors. The prime factorization of 12 is (2^2 \times 3^1). This means that 12 can be expressed with exponents as (2^2) and (3^1). If you mean the powers of 12, they would be 12 raised to various integers, such as (12^1), (12^2), (12^3), and so on.

What is 3x 7 14?

The expression "3x 7 14" seems to involve a multiplication of 3 and 7, which equals 21. If you're looking for a solution to an equation where "3x = 14," solving for x would yield x = 14/3 or approximately 4.67. Please clarify if you meant something else!

What are the different ways in describing a set?

A set can be described in several ways, including roster form, where all elements are explicitly listed (e.g., {1, 2, 3}); set-builder notation, which defines a set by a property that its members satisfy (e.g., {x | x is an even integer}); and interval notation, used primarily for sets of real numbers (e.g., (0, 1) for all numbers between 0 and 1, not including 0 and 1). Additionally, sets can be described by their cardinality, which indicates the number of elements in the set, and by their relationships to other sets, such as subsets or unions.

What is the visual expression or solution to ones ideas?

The visual expression of ideas refers to the way concepts and thoughts are represented through visual elements such as images, colors, shapes, and designs. This can include art, graphic design, photography, or any visual medium that communicates a message or evokes emotions. By translating abstract ideas into tangible visuals, one can effectively convey complex thoughts, enhance understanding, and engage the audience on a deeper level. Ultimately, visual expression serves as a bridge between imagination and perception.

What is the for 4.6 punchline book A?

The punchline for the book "A" in the 4.6 series is a clever twist that often revolves around wordplay or a surprising revelation. This series typically plays with themes of humor and irony, engaging readers with unexpected conclusions that provoke thought or laughter. The punchline encapsulates the essence of the narrative and leaves a lasting impression.

What is the square root of 90000?

90,000 = 300 x 300

Hence

sqrt(90,000) = sqrt(300 X 300)

sqrt(90,000) = 300

How do you simplify the square root of 300?

300 = 3 x 100

Hence

sqrt(300) = sqrt(3 x 100) =>

sqrt(3) X sqrt(100) =>

sqrt(3) X 10

NB Remember '100' = 10 x 10

Hence sqrt(300) = 10*Sqrt(3)

What is the square root of 20 simplified?

The square root of 20 simplified is ±4.5