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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 a Cartesian equation for r equals 4sinx 6cosx?

To convert the polar equation ( r = 4\sin(x) + 6\cos(x) ) to Cartesian coordinates, we use the relationships ( r = \sqrt{x^2 + y^2} ), ( x = r\cos(x) ), and ( y = r\sin(x) ). Substituting ( \sin(x) = \frac{y}{r} ) and ( \cos(x) = \frac{x}{r} ) into the equation, we get:

[ r = 4\left(\frac{y}{r}\right) + 6\left(\frac{x}{r}\right). ]

Multiplying through by ( r ) leads to ( r^2 = 4y + 6x ). Replacing ( r^2 ) with ( x^2 + y^2 ) gives the Cartesian equation:

[ x^2 + y^2 = 4y + 6x. ]

What does arachne do that make it difficult for her to solve her problem?

Arachne is overly confident in her weaving skills, which leads her to challenge the goddess Athena to a contest. Her arrogance blinds her to the consequences of her actions, making it difficult for her to acknowledge her limitations. Additionally, her refusal to respect the gods ultimately results in her downfall, as she fails to consider the repercussions of defying divine authority. This combination of hubris and stubbornness complicates her ability to resolve her predicament.

Disadvantages of an independent measure?

Independent measures design can introduce variability because different participants are used in each condition, which can lead to differences in individual characteristics affecting the results. This variability can make it harder to detect the true effect of the independent variable. Additionally, it often requires a larger sample size to achieve the same statistical power as a repeated measures design, which can increase costs and time for the study. Finally, the need for random assignment to groups is essential, and failure to do so can lead to confounding variables influencing the outcomes.

What is The square root of 150 estimated to the nearest tenth?

The square root of 150 is approximately 12.247. When rounded to the nearest tenth, it is 12.2.

What is the point on the line where the slope changes?

The point on a line where the slope changes is typically referred to as a "corner" or "turning point," often found in piecewise functions or curves rather than linear functions. In these cases, the slope before and after this point differs, indicating a change in direction or steepness. For curves, this point might also be identified as a local maximum, minimum, or inflection point depending on the context. In linear functions, however, the slope remains constant throughout.

How do you derive Quadratic function using table of values?

To derive a quadratic function using a table of values, first, identify the x and y values from the table. Next, calculate the first differences (the differences between consecutive y-values) and then the second differences (the differences of the first differences). If the second differences are constant, this indicates a quadratic relationship. Finally, use the values and the standard form of a quadratic equation (y = ax^2 + bx + c) to solve for the coefficients (a), (b), and (c) using a system of equations based on the points from the table.

How do you isolate a variable?

To isolate a variable, you need to manipulate the equation so that the variable is on one side by itself. This typically involves performing inverse operations, such as adding, subtracting, multiplying, or dividing both sides of the equation by the same value. It's important to apply these operations consistently to maintain the equality. Once the variable is isolated, you can clearly see its value in relation to the other terms in the equation.

How does the value of y change as the x value increase?

The change in the value of ( y ) as ( x ) increases depends on the relationship between the two variables. If ( y ) is a function of ( x ) that is increasing, then ( y ) will also increase as ( x ) increases. Conversely, if the relationship is decreasing, ( y ) will decrease as ( x ) increases. In cases where the relationship is non-linear or involves complex interactions, ( y ) may change in a more variable manner.

How do you multiply positive integers with negative exponents?

To multiply positive integers with negative exponents, first rewrite the expression using the property of exponents that states (a^{-n} = \frac{1}{a^n}). For example, if you have (3 \times 5^{-2}), you can express it as (3 \times \frac{1}{5^2}), which simplifies to (\frac{3}{25}). This method effectively converts the multiplication of a positive integer by a term with a negative exponent into a division operation.

What is the value of y 72degrees?

To determine the value of ( y ) at 72 degrees, more context is needed, such as an equation or geometric relationship involving ( y ). If you're referring to a specific function like sine, cosine, or tangent, please clarify which function or scenario you are referencing.

How can you make 1127 with exponents?

To express 1127 using exponents, you can break it down into its prime factors or use exponential notation. One way is to use the equation ( 1024 + 100 + 3 = 2^{10} + 10^2 + 3 ), where ( 2^{10} = 1024 ). While there isn't a simple representation of 1127 purely as a single exponential term, this combination illustrates how exponents can contribute to its overall value.

What represents a quantity that has a constant halving time?

A quantity that has a constant halving time is typically represented by exponential decay. This means that the quantity decreases by half over a consistent time interval, regardless of its current value. Common examples include radioactive decay, where the half-life remains constant, and certain population dynamics in biology. The characteristic of constant halving time indicates a predictable and exponential decline in the quantity over time.

Who persuade Leonard Euler to pursue math as a career?

Leonard Euler was significantly influenced by his father, Paul Euler, who was a pastor and a mathematician. Recognizing his son's talent in mathematics, Paul encouraged Euler to pursue the subject despite his initial plans to study theology. Euler's academic journey was further shaped by his studies under prominent mathematicians like Johann Bernoulli, who also played a crucial role in nurturing his mathematical abilities and guiding him toward a successful career in mathematics.

What is 1 2 base time 17mm 15mm?

"1 2 base time 17mm 15mm" seems to refer to a specific measurement or ratio, possibly in a construction or manufacturing context. It could indicate a base or starting point with dimensions of 17mm and 15mm, suggesting a relationship or scale between these two measurements. However, without additional context, it's difficult to provide a precise interpretation or application.

Which methods could you use to calculate the y-coordinate of the midpoint of a vertical line segment with endpoints at (0 0) and (0 15)?

To calculate the y-coordinate of the midpoint of a vertical line segment with endpoints at (0, 0) and (0, 15), you can use the midpoint formula, which is given by ( \text{Midpoint} = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right) ). Here, since both endpoints share the same x-coordinate (0), you only need to average the y-coordinates: ( \frac{0 + 15}{2} = 7.5 ). Thus, the y-coordinate of the midpoint is 7.5.

What is the equation of the line with m 3 and b 8.25?

The equation of a line in slope-intercept form is given by ( y = mx + b ), where ( m ) is the slope and ( b ) is the y-intercept. For a line with a slope ( m = 3 ) and a y-intercept ( b = 8.25 ), the equation is:

[ y = 3x + 8.25. ]

What are the independent and dependent variables for how much water is absorbed by dried beans?

In the study of how much water is absorbed by dried beans, the independent variable is the amount of time the beans are soaked in water, as this can be controlled and varied by the researcher. The dependent variable is the amount of water absorbed by the beans, which is measured to determine the effect of the soaking time. Other factors, such as temperature and type of bean, should be kept constant to ensure accurate results.

What is xsquared minus 10x?

The expression "xsquared minus 10x" can be written mathematically as ( x^2 - 10x ). This is a quadratic expression and can be factored as ( x(x - 10) ). It represents a parabola that opens upwards and has zeros at ( x = 0 ) and ( x = 10 ).

What is To calculate the value of an expression or equation?

To calculate the value of an expression or equation involves determining its numerical result by performing the necessary mathematical operations, such as addition, subtraction, multiplication, or division. This process often follows the order of operations (PEMDAS/BODMAS) to ensure accuracy. For example, in the expression (3 + 5 \times 2), you would first multiply 5 by 2 and then add 3, resulting in a final value of 13.

What is the function of the contromeres?

Centromeres are specialized regions of chromosomes that play a crucial role during cell division. They are responsible for the proper alignment and separation of chromosomes during mitosis and meiosis by serving as attachment points for spindle fibers. This ensures that each daughter cell receives an accurate and complete set of chromosomes. Additionally, centromeres help maintain the structural integrity of chromosomes throughout the cell cycle.

Which of the two functions below has the smallest minimum y-value?

To determine which function has the smallest minimum y-value, you need to analyze the functions themselves, typically by finding their critical points through differentiation and evaluating their values at those points. If the functions are quadratic, the vertex can indicate the minimum y-value. Without the specific functions provided, I can't give a definitive answer, but you would compare these critical points to find the smallest minimum y-value.

What is a equivalent 3(x plus 2)?

The expression (3(x + 2)) can be simplified using the distributive property. By multiplying 3 with both terms inside the parentheses, we get (3x + 6). Thus, the equivalent expression is (3x + 6).

The video example 36 dividing a polynomial by a binomial?

In video example 36, the process of dividing a polynomial by a binomial is demonstrated using long division. The polynomial is divided term by term, starting with the leading term of the polynomial, and determining how many times the leading term of the binomial fits into it. This is followed by multiplying the entire binomial by that quotient term, subtracting the result from the original polynomial, and repeating the process with the remainder until the polynomial is fully divided. The final result includes both the quotient and any remainder expressed as a fraction.

How do you write an expression that represents the sum of a number and 12?

To write an expression that represents the sum of a number and 12, you can use a variable to represent the unknown number. For example, if you let the variable ( x ) represent the number, the expression would be ( x + 12 ). This indicates that you are adding 12 to whatever value ( x ) holds.

What is the function of the typhlosome?

The typhlosome is a specialized structure found in the intestines of certain invertebrates, particularly in some annelids and mollusks. Its primary function is to increase the surface area for absorption, facilitating the uptake of nutrients from digested food. By enhancing nutrient absorption efficiency, the typhlosome plays a crucial role in the organism's digestive system.