The factored form of the equation 4x² + 20x + 200 = 0 is 4(x + (5/2) +-5/2+√7(5/2i))(-5/2+√7(-5/2i))
To factor completely, we can begin by factoring out the greatest common factor of the three terms, which is 4:
4(x² + 5x + 50) = 0
Next, we want to factor the quadratic expression in parentheses.
we can use the quadratic formula, which states that the solutions to the equation ax² + bx + c = 0 are given by:
x = (-b ± √(b² - 4ac)) / 2a
In this case, a = 1, b = 5, and c = 50, so we have:
x = (-5 ± √(5² - 4(1)(50))) / 2(1)
x = (-5 ± √(-175)) / 2
x=-5/2+√7(5/2i)
x=-5/2+√7(- 5/2i)
The factored form of the equation 4x² + 20x + 200 = 0 is:
4(x + (5/2) +-5/2+√7(5/2i))(-5/2+√7(-5/2i))
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A study is done on the population of a certain fish species in a lake. Suppose that the population size P (t) after t years is given by the following exponential function P(t)=510(0.72)^t
The population size of the fish species after 5 years is approximately 99.
What is the Population Size of the Species?The population size of the fish species after t years is given by the exponential function P(t)=510(0.72)^t. To find the population size, we simply need to substitute the given value of t in the equation.
For example, if we want to find the population size after 5 years, we substitute t=5 in the equation:
P(5) = 510(0.72)^5
P(5) = 510*0.1934917632
P(5) = 98.680799232
P(5) ≈ 99.
Therefore, the population size of the fish species after 5 years is approximately 99.
We can determine whether the population is growing or decaying by examining the value of the base of the exponential function, which is 0.72 in this case. Since the base is less than 1, we know that the exponential function represents exponential decay. This means that the population of the fish species in the lake is decreasing over time, and the rate of decrease is determined by the value of the base. In this case, the population is decreasing by a factor of 0.72 each year.
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What is the probability that this person works at the Rhyl site?
First time seeing this type of question
Answer:
1/200×60/360=1/6÷200
A random sample of 100 people was taken. Eighty-five of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%.
(1). The test statistic is
0.80
0.05
1.25
2.00
By z-test the test static is 1.25.
What is z-test?
It is a statistical test to determine whether two population means are different at the time when the variances are known and the sample size is large. Also it is a hypothesis test in which the z-statistic maintains a normal distribution.
A random sample of 100 people was taken. Eighty-five of the people in the sample favored Candidate A. We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 80%.
So from the given information we have,
sample size (n)= 100
sample proportion ( p₁) = 0.85 [ 85 of the people in the sample favored candidate A]
So, the null hypothesis ,
H₀ : p = 0.80
The alternative hypothesis ,
Hₐ : p > 0.80
Now the test static can be determined by the formula of z-test
[tex]z= \frac{p_{1} - p }{\sqrt{\frac{p(1-p)}{n} } }[/tex]
[tex]z= \frac{0.85 - 0.80 }{\sqrt{\frac{0.80(1-0.80)}{100} } }[/tex]
[tex]z= \frac{0.05}{\sqrt{\frac{0.16}{100} } }[/tex]
z = (0.05× 10)/0.4
z= 1.25
Hence , by z-test the test static is 1.25.
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6n²-39n-21
How To Solve This Factoring Perfect Squares Trinomials problem?
Answer:
First image.
Step-by-step explanation:
Second image.
a variable needs to be eliminated to solve the system of equations below.
x-7y= -45 -x+8y=51
Eliminate x by adding the two equations, yielding [tex]y = 6[/tex]. Then, substitute y into either equation to solve for x, obtaining [tex]x = -3[/tex]. The solution is [tex](-3,6)[/tex].
What is equation?An equation is a mathematical statement that uses symbols, numbers, and variables to show that two expressions are equal, typically with an equal sign between them.
A variable is a quantity or symbol that can take on different values in a mathematical expression, equation, or formula, typically represented by a letter.
To eliminate a variable in a system of equations, we want to find a way to add or subtract the two equations so that one of the variables is eliminated.
In this case, we can eliminate the variable x by adding the two equations
[tex]x- 7y = -45[/tex]
[tex](-x +8y = 51)[/tex]
[tex]y = 6[/tex]
Now that we have found the value of y, we can substitute it into either of the original equations to solve for x. Let's use the first equation
[tex]x-7y = -45\\x- 7(6) = -45\\x = -45+42\\x = -3[/tex]
Therefore the solution to the system of equations is [tex]x= -3[/tex] and[tex]y= 6[/tex]
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the solution to the system of equations is (x, y) = (-3, 6).
What is an Equations?
Equations are mathematical statements with two algebraic expressions on either side of an equals (=) sign. It illustrates the equality between the expressions written on the left and right sides. To determine the value of a variable representing an unknown quantity, equations can be solved. A statement is not an equation if there is no "equal to" symbol in it. It will be regarded as an expression.
To eliminate the variable x, we can add the two equations together. This will result in the x variable being eliminated, leaving us with an equation in terms of y:
(x - 7y) + (-x + 8y) = -45 + 51
Simplifying and solving for y, we get:
y = 6
Now that we know the value of y, we can substitute it into one of the original equations to solve for x. Using the first equation:
x - 7(6) = -45
Simplifying and solving for x, we get:
x = -3
Therefore, the solution to the system of equations is (x, y) = (-3, 6).
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Use the figure shown below to complete the sentence? The area of the figure is blank square units
If the height of this prism is 10 cm, what is the surface area
of the rectangular prism?
Surface Area = 2lw + 2lh + 2wh
5 cm
5 cm
Answer:
2(5)(5) + 4(5)(10) = 50 + 200 =
250 square centimeters
If x and y are linearly​ independent, and if z is in Span {x, y}​, then {x, y, z} is linearly dependent.
a. true
b. false
The statement is true: If x and y are linearly independent, and if z is in Span {x, y}, then {x, y, z} is linearly dependent.
The statement is true.
Let's first understand the terms used:
Linearly independent:
A set of vectors is linearly independent if none of them can be expressed as a linear combination of the other vectors. In other words, no vector in the set can be written as a sum of scalar multiples of the other vectors.
Span:
The span of a set of vectors is the set of all linear combinations of those vectors.
In this case, Span[tex]{x, y}[/tex] is the set of all vectors that can be formed by adding scalar multiples of x and y.
Now, let's consider the given statement:
If x and y are linearly independent, it means that neither x nor y can be expressed as a linear combination of the other. However, it is given that z is in the Span[tex]{x, y}.[/tex]
This means that z can be expressed as a linear combination of x and y:
[tex]z = ax + by[/tex], where a and b are scalar constants.
Let's analyze the set[tex]{x, y, z}[/tex]. We know that z can be expressed as a linear combination of x and y, as shown above. This implies that the set [tex]{x, y, z}[/tex]is linearly dependent, because one vector (z) can be expressed as a linear combination of the others [tex](x and y)[/tex].
Thus, the statement is true: If x and y are linearly independent, and if z is in Span[tex]{x, y}[/tex], then[tex]{x, y, z}[/tex] is linearly dependent.
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Select the correct number from each drop-down menu to complete the equation. 7 8 − ( − 2 + 3 4 ) = 8 7 −( − 2+ 4 3 )= ( + ) + 7 8 + 8 7
The value of the expression is 17/8.
Given is an expression, 7/8 - (-2+3/4) = ( ____+____) + 7/8, we need to solve it,
7/8-(-2+3/4)
= 7/8-(-8+3)/4
= 7/8 + 5/4
= 7+10 /8
= 17/8
Hence, the value of the expression is 17/8.
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The perimeter of parallelogram ABCD is 96 cm. AD is 3 cm more than twice AB. Find the lengths of all four sides of ABCD
The lengths of all four sides of parallelogram ABCD:
AB = 15 cm, BC = 33 cm, CD = 15 cm and AD = 33 cm
Consider a parallelogram ABCD
Let's assume that x represents the length of sides AD and BC
y be the length of sides AB and CD
We know that the formula for the perimeter of parallelogram is
P = 2(length + width)
Here, AD is 3 cm more than twice AB
So we get an expression,
AD = 3 + 2(AB)
AD = 3 + 2y
x = 3 + 2y
USing above formula of perimeter, the perimeter of parallelogram ABCD would be,
P = 2(x + y)
96 = 2(3 + 2y + y)
48 = 3 + 3y
45 = 3y
y = 15 cm
And x = 3 + 2(15)
x = 33 cm
Therefore, the lengths of sides AD and BC = 33 cm and the lengths of sides AB and CD = 15 cm
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Trevor is making soup in a cylindrical cooking pot. It has a diameter of 10 inches and a height of 8 inches. What is the approximate volume of the cooking pot (Use 3.14)
The approximate volume of the cooking pot will be; 2009.6 cubic inches.
Since volume of the cylinder is the product of the height, pie, and square of the radius.
The volume of the cylinder = [tex]\pi r^{2} h[/tex]
We know that the volume of the cylinder is [tex]\pi r^{2} h[/tex]
Here we are given that Trevor is making soup in a cylindrical cooking pot that has a diameter of 10 inches and a height of 8 inches.
h=10 in, and r= 8 in, so
[tex]\begin{gathered} V=(3.14)(10 in)(8 in)^2 \\ V= 2009.6 in^3 \end{gathered}[/tex]
Then, the pot can hold 2009.6 cubic inches
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The box plot displays the number of flowers planted in a town last summer.
A box plot uses a number line from 6 to 21 with tick marks every one-half unit. The box extends from 10 to 15 on the number line. A line in the box is at 11. The lines outside the box end at 7 and 20. The graph is titled Flowers Planted In Town, and the line is labeled Number of Flowers.
Which of the following is the best measure of center for the data shown, and what is that value?
The mean is the best measure of center and equals 11.
The mean is the best measure of center and equals 12.
The median is the best measure of center and equals 11.
The median is the best measure of center and equals 12.
The correct statement regarding the best measure of center from the box and whisker plot is given as follows:
The median is the best measure of center and equals 11.
What does a box and whisker plot shows?A box and whisker plots shows these five features from a data-set, listed as follows:
The minimum non-outlier value.The 25th percentile, which is the median of the bottom 50%.The median, which splits the entire data-set into two halfs, the bottom 50% and the upper 50%.The 75th percentile, which is the median of the upper 50%.The maximum non-outlier value.The features for the data-set in this problem are given as follows:
Minimum of 6.Q1 = 7.Median of 11.Q3 = 20.Maximum of 21.More can be learned about box plots at https://brainly.com/question/3473797
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How much would a retailer pay for 30 dozen work gloves if the wholesaler's
list price is $62 a dozen, less 28% ?
The retailer would pay $1,339.20 for 30 dozen work gloves.
One dozen is equal to 12, so 30 dozen would be equal to 360 gloves.
The wholesaler's list price for one dozen gloves is $62.
The discount given by the wholesaler is 28%
The retailer pays 100% - 28% = 72% of the list price.
The price the retailer pays for one dozen gloves is:
$62 x 0.72 = $44.64
Therefore, the price the retailer pays for 30 dozen gloves is:
$44.64 x 30 = $1,339.20
So the retailer would pay $1,339.20 for 30 dozen work gloves.
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Solids $A$ and $B$ are similar. Use the given information and scale factor $k$ from solid $A$ to solid $B$ to find the volume of solid $B$ to the nearest thousandth. Cylinder $A$ has a volume of $112\pi$ cubic meters and $k=$ $\frac{1}{4}$. The volume of solid $B$ is about
cubic meters
The volume of solid B is about 7π cubic meters, which is approximately 21.99 cubic meters when rounded to the nearest thousandth.
The volume of a cylinder is given by the formula V = πr²h, where r is the radius and h is the height. Since solids A and B are similar, they have the same shape, but different sizes.
Let V₁ be the volume of solid A, and V₂ be the volume of solid B. The scale factor k from solid A to solid B is 1/4, which means that the dimensions of solid B are 1/4 of the dimensions of solid A.
We can find the radius and height of solid B by multiplying the radius and height of solid A by 1/4. Therefore, we have:
V₂ = π(r/4)²(h/4) = (π/16)rh²
We are given that V₁ = 112π cubic meters, so we can solve for rh²:
112π = πr²h
rh² = 112
Substituting into the formula for V₂, we get:
V₂ = (π/16)rh² = (π/16)(112) = 7π
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A cone is shown below.
Which 2-dimensional shape results from slicing a cross section horizontally and parallel to the base.
A. rectangle
B. trapezoid
C. square
D. rhombus
E. ellipse
F. circle
Step-by-step explanation:
I don't know if so what we do this question but I kind of wish I can be with triangle don't ever stop and never ever disturb you
in a specific city there are 1350 people per square mile the city is shaped like a rectangle has a length of 12 miles and a width of eight what is the population of the city?
To find the population of the city, we need to find the total number of people living in the city. We know that there are 1350 people per square mile, so we can find the total number of people by multiplying the number of square miles in the city by the number of people per square mile.
The area of the city is the length times the width, so:
Area = Length x Width
Area = 12 miles x 8 miles
Area = 96 square miles
Now, we can find the population by multiplying the area by the number of people per square mile:
Population = Area x People per square mile
Population = 96 square miles x 1350 people per square mile
Population = 129,600 people
Therefore, the population of the city is 129,600 people.
Hope this helps!
PLEASE HELP I'LL GIVE THE BRAINLIEST
Answer:
H = 45 ½ ÷ 6 ½
Step-by-step explanation:
The formula for the area of the base of the box is L * W.
The formula for the volume of the box is L * W * H
Therefore dividing 45 ½ (volume of box) by 6 ½ (area of base) will give you the height of the box
Can someone please help me with this question please
The x - coordinate of B given the y - coordinate, can be found to be 3 units.
How to find the x - coordinate ?Looking at the figure, we notice that the relationship between B and the circle can be modeled as a right triangle. 5 would be the hypotenuse, 4 which is the y - coordinate would the be the height.
The x - coordinate would then be the length which can be found by the Pythagorean theorem.
The x - coordinate is:
= 5² = 4² + x²
Simplifying the equation, we get:
25 = 16 + x²
9 = x²
x = 3
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Cory is a bird watcher. He estimates that 30% of the birds he sees are American robins, 20% are dark-eyed juncos, and 20% are song sparrows. He designs a simulation.
Answer:
C.0.75
Step-by-step explanation:
the number of occurrence is 15 and the number of simulations is 20 so
P= 15/20
.75
What is the unit price for a piece of cheese if 1. 24 pounds costs $11. 25
The unit price for a piece of cheese is $0.11 per pound.
To find the unit price, we need to divide the total cost by the total weight. In this case, we have 1.24 pounds of cheese that costs $11.25.
So, we can set up a proportion
1.24 pounds / $11.25 = x pounds / $1
To solve for x, we can cross-multiply
1.24 pounds * $1 = $11.25 * x pounds
1.24 = $11.25 * x
x = 1.24 / $11.25
x = 0.11
So, the unit price is $0.11 per pound.
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help me please please today
a) Function f(x) = 2^x is an exponential growth function because a = 2 is greater than 0 and b = 2 is greater than 1. The graph of the function starts at (0,1) and increases rapidly as x increases.
b) Function f(x) = (1/2)^x is an exponential decay function because a = 1/2 is greater than 0 and b = 1/2 is between 0 and 1. The graph of the function starts at (0,1) and decreases rapidly as x increases.
What are the key features of both graphs?Key features of both graphs:
x-intercept: There is no x-intercept for either function.y-intercept: The y-intercept for both functions is (0,1).Domain: The domain of both functions is all real numbers.Range: The range of f(x) = 2^x is all positive real numbers, while the range of f(x) = (1/2)^x is all positive numbers between 0 and 1.Asymptote: The x-axis is a horizontal asymptote for both functions.Growth/decay factor: The growth/decay factor for f(x) = 2^x is 2, while the growth/decay factor for f(x) = (1/2)^x is 1/2.Learn more about exponential growth function at:
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ADD: (Give answer in simplest form)
6 2/7+7 1/2
Can you pls help? This is geometry
Answer:
(x-3)^2+(y-2)^2=16
Step-by-step explanation:
The equation of a circle in standard form is (x-h)^2+(y-k)^2=r^2
So, the center is (3,2), so you have to input the opposite value.
(x-3)^2+(y-2)^2=4^2
simplify:
(x-3)^2+(y-2)^2=16
What variable names does a function have access to?
a) All variables used in a program.
b) Only variables created in the function.
c) Only the parameters passed to the function.
d) Parameters that are passed to the function and any variables created in the function.
A function has access to parameters that are passed to it and any variables created within the function (local and function scope).
The variable names that a function has access to depend on the scope of the variables. Scope refers to the visibility of a variable within a program.
There are four different scopes that a variable can have in relation to a function:
Global scope -
A variable that is declared outside of a function has global scope.
This means that it can be accessed by any function within the program.
Local scope -
A variable that is declared within a function has local scope.
This means that it can only be accessed within the function in which it was declared.
Parameter scope -
A variable that is passed as a parameter to a function has parameter scope.
This means that it can only be accessed within the function in which it was passed.
Function scope -
A variable that is created within a function has function scope.
This means that it can only be accessed within the function in which it was created.
It does not have access to variables declared outside of the function (global scope) unless they are explicitly passed as parameters.
It is important to note that naming conflicts can occur if variable names are not chosen carefully, especially when dealing with global and local scope.
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15 POINTS PLEASE I NEED HELP
Answer:
x = 7∠ECB = 65°Step-by-step explanation:
You want the measures of x and ∠ECB in rectangle ABCD with center point E and AE=3x+6, BD=5x+19, ∠EBA=25°.
DiagonalsThe diagonals of a rectangle are congruent and cross at their midponts. This means the triangles they form are all isosceles.
XThe value of x can be found by relating the length of a half-diagonal to the length of the whole diagonal.
2·AE = BD
2(3x +6) = 5x +19 . . . . . . . substitute given lengths
6x +12 = 5x +19 . . . . . eliminate parentheses
x = 7 . . . . . . . . . . . subtract 5x+12
The value of x is 7.
AngleAngle EBC is the complement of angle EBA, so its measure is ...
∠EBC = 90° -∠EBA
∠EBC = 90° -25° = 65°
Angle ECB is the other base angle of isosceles triangle BCE, so has the same measure as ∠EBC.
∠ECB = 65°
__
Additional comment
You know the corner angles of a rectangle are 90°, which is what makes angles EBA and EBC complementary.
With x = 7, AE = 27 and BD = 54. The full diagonal is double the length of the half-diagonal, as you expect.
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Use your shapes to create a new shape with an area of 4 square units. Trace your shape.
We can construct a shape of area 4 square meters using the four shapes square, rectangle, triangle and parallelogram.
What are your knowledge of area ?Area is the entire amount of space occupied by a flat (2-D) surface or an object's shape.
The area of a plane figure is the area that its perimeter encloses. The amount of units in a figure determines its area. Area is measured in square units like cm² and m². Area of a shape is a two dimensional quantity.
Area of a square = side² (a²)
Area of a triangle = 1/2 × base length × height (1/2×b×h)
Area of a rectangle = length × breadth ( l×b )
Area of a parallelogram = base length × height ( b×h)
Consider the square of side 1 m
Area = 1 × 1 = 1 m²
Now consider the triangle of base length , b = 1/2 m and height, h = 2 m
∴ Area = 1/2×1/2×2 = 1/2 m²
Once more , area of the parallelogram of side 1 m and height 2 m is given by
Area = 1×2= 2 m²
For the rectangle of length 1/2 m and breadth 1 m
Area = l × b = 1/2 × 1 = 1/2 m²
∴ Total area = 1 + 1/2 + 2 + 1/2 = 4 square meter.
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Craig started a new print-screen company. His weekly income can be modeled by the function p(x)=−2x2+145x
, where x
is the number of t-shirts produced in a week.
Approximately how many shirts should Craig make to maximize his earnings for the week?
Craig should make approximately 36 shirts to maximize his earnings for the week.
How to find how many shirts to maximize his earnings for the week?
The maximum value of x for a quadratic equation, ax² + bx + c is given by the formula:
x (max) = -b/2a
Since the weekly income can be modeled by the function p(x)= −2x² + 145x.
In this case a = -2 and b = 145. Thus,
x (max) = -145/2(-2)
= 145/4
= 36.25
Thus, Craig should make approximately 36 shirts to maximize his earnings for the week
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Question 1-2
The relationship between two variables a and b is proportional. When a is 4, b is 49, What is a when b is 147?
12
16
4
8
Therefore , the solution of the given problem of equation comes out to be the value of an is 12 when b is 147. Therefore, 12 is the right response.
Define equation.In intricate algorithms, variable words are typically employed to demonstrate consistency between two opposing arguments. Equations are academic phrases that are used to demonstrate the equality of different academic figures. Consider the specifics of the above x + 7 suggestions. improving in this case provides b + 7 while constructing y + 7 before integrating.
Here,
The following values can be used to put up a proportion if the relationship between variables a and b is proportional:
=> a / b = 4 / 49
The value of a when b is 147 can therefore be calculated using this ratio:
=> a / 147 = 4 / 49
By cross-multiplying, we can isolate a:
=> a = (4 / 49) * 147
Now that we know the value of a, we can:
=> a = 12
Therefore, the value of an is 12 when b is 147. Therefore, 12 is the right response.
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if the diameter of a circle is 4x+12 then find the area?
please solve this question...this question is based on "multiplying binomials by binomials"
since the formula for the area of a circle squares the radius, the area of the larger circle is always 4 or 22 multiple the tiny square
What are the solutions to the equation 9x2 = 36?
Answer: x = 2 and x = -2.
Step-by-step explanation:
The solutions to the equation 9x^2 = 36 can be found by first dividing both sides by 9, giving x^2 = 4. Then, taking the square root of both sides gives x = ±2. Therefore, the solutions are x = 2 and x = -2.
Answer:
Step-by-step explanation:
9x^2 = 36 | :9
x^2 = 4
x=+-2