The equation of line in slope-intercept form is found as y = -3x + 7.
What is meant by slope-intercept form?The slope-intercept part of a line is a method for writing a line's equation so that the slope and y-intercept are easily recognizable. The slope of the line is its steepness, as well as the y-intercept is where the line intersects the y-axis.For the given question;
The two passing point of the line are;
(x1, y1) = (2,1)
(x2, y2) = (1,4)
Slope = m = (y2 - y1)/(x2 - x1)
Put the values.
m = (4 - 1)/(1 - 2)
m = -3
Then, the equation of the line in slope intercept form is found using two point equation.
y - y1 = m(x - x1)
y - 1 = -3(x - 2)
Simplifying,
y = -3x + 7
-3 is the slope and 7 is the y intercept.
Thus, the equation of line in slope-intercept form is found as y = -3x + 7.
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What is the difference in
|-3| and -3
Answer:
6, because anything inside | | are positive so -3 will now be 3.
3 minus -3 = 6
Step-by-step explanation:
Hope it helps! =D
By air, the distance from city A to city B is 3001 miles less than the distance from city C to city D. If the total of these
← two distances is 7869 miles, find the distance from city C to city D.
miles
D
***
The distance from city C to city D is 5435 miles
What is basic algebra ?The area of mathematics known as algebra aids in the representation of issues or circumstances into mathematical statements. To create a meaningful mathematical expression, it requires variables like x, y, and z as well as mathematical operations like addition, subtraction, multiplication, and division. Algebra is used in all areas of mathematics, including coordinate geometry, calculus, and trigonometry. 2x + 4 = 8 is a basic algebraic expression.When operations like addition, subtraction, multiplication, division, etc. are performed on variables and constants, we obtain algebraic expressions as the mathematical statement.
The distance from city A to city B is 3001 miles Let distance from city A to city B x and distance from city C to city D y
The distance from city A to city B is 3001 miles
x= y - 3001....(i)
x+ y = 7869....(ii)
y- 3001 +y = 7869
2y = 10870
y=5435
The distance from city C to city D is 5435
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The table below shows the probability distribution of a random variable Z. Z P(Z) -13 0.69-12 0.18 -11 0.04 -10 0.01 -9 0.01 -8 0.04 -7 0.03 What is the expected value of Z? Write your answer as a decimal.
To be able to get the expected value of Z, we will be using the following formula:
[tex]\text{ Expected Value = }\mu=Z_1P_1+Z_2P_2+Z_3P_3\text{ + }\ldots Z_nP_n[/tex]We get,
[tex]\text{ Expected Value = }\mu=Z_1P_1+Z_2P_2+Z_3P_3\text{ + }\ldots Z_nP_n[/tex][tex]\text{ = (-13)(0.69) + (-12)(0.18) + (-11)(0.04) + (-10)(0.01) + (-9)(0.01) + (-8)(0.04) + (-7)(0.03)}[/tex][tex]\text{ = (-8.97) + (-2.16) + (-0.44) + (-0.1) + (-0.09) + }(-0.32)\text{ + (-0.21)}[/tex][tex]\text{ = -8.97 - 2.16 - 0.44 - 0.1 - 0.09 }-0.32\text{ - 0.21}[/tex][tex]\text{ Expected Value = }\mu\text{ = -12.29}[/tex]Therefore, the expected value of Z is -12.29.
Use the drawing tools to form the correct answer on the number line
Graph the solution set to this inequality.
-2(x + 6) > -4x
Answer:
Step-by-step explanation:
Answer:
x > 6 with an open point
Hope this helps!
Step-by-step explanation:
-2 ( x + 6 ) > -4x
-2x - 12 > -4x
-(-4x) - 2x > -(-12)
4x - 2x > 12
2x > 12
x > 6
Geometry help please
Given
A right angle triangle is removed from the rectangle to create the shaded region.
That is,
To find: The area of the shaded region.
Explanation:
It is given that,
That implies,
The area of the shaded region is,
[tex]\begin{gathered} Area\text{ }of\text{ }the\text{ }shaded\text{ }region=Area\text{ }of\text{ }the\text{ }rectangle-Area\text{ }of\text{ }the\text{ }triangle \\ =l\times b-\frac{1}{2}\times b\times h \\ =5\times9-\frac{1}{2}\times4\times3 \\ =45-6 \\ =39ft^2 \end{gathered}[/tex]Hence, the area of the shaded region is 39ft^2.
Statistics
Does the frequency distribution appear to have a normal distribution using a strict interpretation of the relevant criteria?
Speed-- Number of cars
0-29 4
30-59 16
60-89 60
90-119 20
No, the distribution is not symmetric THIS ONE
No, the frequency do not increase from the low frequency to a maximum frequency
Yes, all the requirements are met
Answer:
The answer to your question is: B
Explanation:
based on the statistics given, this answer best fits the Queston.
What is the largest five-digit multiple of 15 whose digits are all distinct and nonzero?
The largest five-digit multiple of 15 whose digits are all distinct and nonzero is 12345.
How can we express numbers belonging to decimal numeral system?Suppose that the number is abcd.efg and belongs to the decimal numerical system. Remember one thing that the place on the left of decimal point is called ones. Move one-one places to right, and divide by 10 and 10 more and more. Move one-one places to left, and multiply (un-divide) by 10 and 10 more and more. We will call d as ones digit, c as tens digit (it get multiplied by 10), b as hundreds digit etc.
WE need to find the five-digit multiple of 15 whose digits are all distinct and nonzero.
Thus, we can see that the largest five-digit multiple of 15 could be ;
12345
Since it must be all distinct and nonzero. so the correct digit is 12345.
Hence, the largest five-digit multiple of 15 whose digits are all distinct and nonzero is 12345.
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given: P(A) = 0.45, P(B) = 0.65, and P(A and B) = 0.35.
Find:
P (A or B)
P(A OR B) ( line on top)
P(A|B)
P(B|A)
Answer:
P(A or B) = 0.75P(A or B)' = 0.25P(A|B) = 0.54P(B|A) = 0.78Step-by-step explanation:
Normally we use the symbols U for set union corresponding to or and ∩ for set intersection corresponding to and.
But here i will use and and or
By the rules of probability
P(A or B) = P(A) + P(B) - P( A and B)
So P(A or b ) = 0.45 + 0.65 - 0.35 = 0.75
The complement of a set A is all the elements not in A
P(A') = 1 - P(A)
If we denote the complement of a set A as A' then your second expression is asking What is the complement of A or B or P(A or B)'
P(A and B)' = 1 - P(A or B) = 1- 0.75 = 0.25
P(A|B) = P(A and B)/P(B) = 0.35/0.65 = 0.54
P(B|A) = P(A and B)/P(A) = 0.35/0.45 = 0.78
Graph the compound function
A contractor hired 150 workers to pave 30 miles of highway how many workers will they need to hire to pave 20 miles of highway in the same amount of time?
Answer: 100
Step-by-step explanation:
First, we need to know how many workers must be hired to pave one mile.
Which is 5 workers per 1 mile ( 150 / 30 )
Then you can either do
(5 + 5 +5 +5 + 5) + (5 + 5 +5 +5 + 5) + (5 + 5 +5 +5 + 5) + (5 + 5 +5 +5 + 5)
OR
5 x 20 = 100
( if I'm wrong it's like 3 am so I'm a bit slow but I hope I helped )
create an inequality expression with square root 8 and square root 16/2 thats shows how they compare
We are given the following two numbers to compare
[tex]\sqrt[]{8}\quad and\quad \frac{\sqrt[]{16}}{2}[/tex]Let us simplify them
[tex]\begin{gathered} \frac{\sqrt[]{16}}{2}=\frac{4}{2}=2\quad (\text{this is smaller)} \\ \sqrt[]{8}=2.828\quad (\text{this is greater)} \end{gathered}[/tex]So, we can compare them as
[tex]\sqrt[]{8}>\frac{\sqrt[]{16}}{2}[/tex]The quantity on the left side is greater than the quantity on the right side.
Directions: write an appropriate equation for the given graph using your knowledge of parent functions and (h,k)
The parent functions are defined with all coefficients with value 1.
They can be linear, quadratic, cubic, absolute, reciprocal, exponential, logarithmic, square root, sine, cosine, tangent...
Then we can pick a function and transform it in order to include the point (-1,5) in the function definition.
We will use the quadratic parent function:
[tex]y=x^2[/tex]We will adjust the coefficient a of the quadratic function in order to include (-1,5)
[tex]\begin{gathered} y=a\cdot x^2 \\ 5=a(-1)^2=a \\ a=5 \end{gathered}[/tex]Then, our transformed function is:
[tex]y=5a^2[/tex]
Which of the following is equivalent to −4(2x + 3y) − 6(3q + 7p)?
ill give coins or whatever its called...
Answer: −8x − 12y − 18q − 42p
Step-by-step explanation:
i did the exam xD
Question 1 options:
Is the relation in this set of points a function?
{(-2, 6) , (4, 5) , (3, -3) , (6, 9), (4, -4)}
State whether the statement is true of false.
1. The relation is a function.
2. An element from the domain is paired with more than one element from the range.
Answer:
1.4 Relations and Functions
A relation is a correspondence between two sets. If x and y are two
elements in these sets and if a relation exists between x and y, then x
corresponds to y, or y depends on x.
DEFINITION OF A FUNCTION:
Let X and Y two nonempty sets. A function from X into Y is a relation that
associates with each element of X, exactly one element of Y.
However, an element of Y may have more than one elements of X
associated with it.
That is for each ordered pair (x,y), there is exactly one y value for each x,
but there may be multiple x values for each y. The variable x is called the
independent variable (also sometimes called the argument of the
function), and the variable y is called dependent variable (also
sometimes called the image of the function.) x = y2 is not a function from X into Y, because there
is not exactly one y value for each x.
Solving for y, you get y =
which means there are two possible values for y
Step-by-step explanation:
Match the polar equations to their rectangular forms-
Applying the rules for the polar equations, the correct pairs are given in the image at the end of the answer.
What are polar equations?
The most well known polar equation rules are given as follows:
For the first pair, when x = 2, we have that:
rcos(θ) = 2.
r = 2/cos(θ)
r = 2 sec(θ), as one divided by the cosine is the secant.
For the second pair, we have that:
x² + y² = 36.
x² + y² = r², hence:
r² = 36
r = 6.
For the third pair, we have that:
x² + y² = 2y
r² = 2rsin(θ).
r²/r = 2sin(θ).
r = 2sin(θ).
For the fourth pair, we have that:
[tex]x = \sqrt{3}y[/tex]
[tex]\frac{y}{x} = \frac{1}{\sqrt{3}}[/tex]
[tex]\frac{y}{x} = \frac{\sqrt{3}}{3}[/tex]
Then the angle theta is given as follows:
θ = arctan(sqrt(3)/3) = pi/6.
For the fifth pair, we have an angle in which the sine and the cosine are equal, hence this angle is of 45º = pi/4.
The image at the end of the answer shows all the matched pairs.
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I am a block.I have I flat surfaceI have I curved surface
the shape of the curved surface is the sphere
So, as a part of the shape is flat
The block may represents a semi sphere
Evalúe the limit. Show steps
After evaluating the limit we have came to find that the limit of [tex]\lim_{x\rightarrow -\infty }\frac{x^2}{x^2\ +4}[/tex] as x approaches ∞- is 1
What is limit?The value that a function, sequence, or index approaches as an input, or an index, approaches a particular value is known as a limit in mathematics. Limits, which are essential to calculus and mathematical analysis, are required by the definitions of continuity, derivatives, and integrals.
In addition to being closely related to the concepts of limit and direct limit in category theory, the idea of a limit of a sequence is further generalised to encompass the idea of a limit of a topological network.
A limit of a function is typically expressed in formulas as
[tex]{\displaystyle \lim _{x\to c}f(x)=L,}[/tex]
To find the limit we will use L'Hôpital's Rule
Find the derivative
⇒ [tex]\lim_{x\rightarrow -\infty }\frac{x^2}{x^2\ +4}[/tex]
⇒ [tex]\lim_{x\rightarrow -\infty }\frac{2x}{2x +0}[/tex]
⇒ [tex]\lim_{x\rightarrow -\infty }\frac{2x}{2x }[/tex]
Evalue -∞ as x
⇒ [tex]\frac{2(-\infty)}{2(-\infty)} }[/tex]
⇒ 1
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Please help, you also need to explain your reasoning
The value of x that makes m parallel to n is 90 degrees.
The value of x that makes m and n parallel is 15.
How to find the angles in parallel lines?
When parallel lines are cut by a transversal line, angle relationships are formed such as corresponding angles, alternate angles, vertically opposite angles etc.
The value of x that makes the line ma and n parallel can be calculated as follows:
180 - x = x (alternate exterior angle)
180 = 2x
x = 180 / 2
x = 90 degrees
2.
3x - 15 + 150 = 180(supplementary angles)
3x = 180 - 150 + 15
3x = 45
x = 45 / 3
x = 15
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PLEASE HELP … Would really appreciate it
The diameter of the outer circle = 12.907 ft
The thickness of the circular pipe = 2.983 ft
The diameter of the inner circle = q = The diameter of the outer circle - The thickness of the circular pipe
⇒ The diameter of the inner circle = 12.907 - 2.983 ft
⇒ The diameter of the inner circle = q = 9.924 ft
What is a Circle?All points in a plane that are at a specific distance from a specific point, the center, form a circle. In other words, it is the curve that a moving point in a plane draws to keep its distance from a specific point constant. The radius of a circle is the separation between any point on the circle and its center.A circle, specifically, is a straightforward closed curve that separates the plane into its inner and exterior.In common parlance, the word "circle" can apply to either the figure's boundary or its entirety, including its inside; in rigorous technical parlance, the circle only refers to the boundary, and the entire shape is referred to as a disc.To learn more about Circles, refer to:
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4. Find the length of a cylinder of volume 2 litres and radius 10 cm.
5. Find the radius of a cylinder of volume 45 cm³ and length 4 cm.
Remember 1
length of a cylinder of volume 2 litres and radius 10 cm is 0.0064cm and the radius of a cylinder of volume 45 cm³ and length 4 cm is 1.8928cm.
PART A
Volume of Cylinder = 2 Litres
Radius of cylinder = r = 10 cm
We need to find the length of a cylinder .
We know , Volume of Cylinder = π[tex]r^{2} h\\[/tex]
On substituting the values of Volume of Cylinder and r , we get
2 = π( [tex]10^{2}[/tex])h
h = 2 / 100π = 0.0064 cm
Here h = length of a cylinder
The length of a cylinder is 0.0064cm .
PART B
radius of a cylinder = r
volume of cylinder = 45 cm³
length of cylinder = h = 4 cm
Volume of Cylinder = π[tex]r^{2} h\\[/tex]
45 = 3.14 [tex]r^{2}[/tex] (4)
[tex]r^{2}[/tex] = 3.5828
r = 1.8928
Radius of a cylinder is 1.8928cm.
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What is the slope of the line that passes through the points (10, 4)(10,4) and (7, 3)(7,3)? Write your answer in simplest form.
The slope of the line that passes through points (10,4) and (7, 3) is 1/3
Here we are dealing with a slope of a line where a slope of a line is the change in the y coordinate with regard to the change in the x coordinate. If P(x1,y1) and Q(x2,y2) are the two points on a straight line, at that point the slope formula is given by:
m = Change in y-coordinates/Change in x-coordinates
m = (y₂– y₁)/(x₂ – x₁)
Since we are given two points (10,4) and (7, 3), where x₁ and x₂ are 10, 7 whereas y₁ and y₂ are 4, 3
From the formula we get,
m = (y₂-y₁)/(x₂-x₁)
= ( 3-4)/(7 - 10)
= -1/-3
=1/3
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A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the given equation. Using this equation, find out the maximum amount of profit the company can make, to the nearest dollar. y = -x² + 64x - 292
Answer:
what
Step-by-step explanation:
i think maybe like… actually
solve for x
8x=4x−32
Answer:
[tex]x = - 8[/tex]
Step-by-step explanation:
[tex]8x = 4x - 32 \\ 8x - 4x = - 32 \\ 4x = - 32 \\ x = - 8[/tex]
Translate the sentence into an equation.
The sum of 4 times a number and 5 is 2.
Use the variable y for the unknown number
Answer:
4y + 5 = 2
Step-by-step explanation:
4y + 5 = 2 Subtract 5 from both sides
4y = -3 Divide both sides by 4
y = [tex]\frac{-3}{4}[/tex]
Answer:
4y+5=2
Step-by-step explanation:
First, replace "a number" with "y"
The sentence becomes: "The sum of 4 times y and 5 is 2"
Replace "is" with the equals sign, "="
The sentence becomes: "The sum of 4 times y and 5 = 2"
Replace "times" with the multiply symbol, " * "
The sentence becomes: "The sum of 4 * y and 5 = 2"
Replace "the sum of ___ and ___" with " ___ + ___"
The sentence becomes: "4*y + 5 = 2".
the " * " isn't needed since 4y implies multiplication already, so you can optionally remove the *
Consider the function f(x) = -2/3x +5.
What is ƒ ( − 1/2 ) ?
After substituting x = -1/2 in f(x), the value of the function f(-1/2) is found to be 5.333.
What exactly is function?A function from a set X to a set Y assigns exactly one element of Y to each element of X.
What is the function's domain and codomain?The set X is known as the function's domain, and the set Y is known as the function's codomain.
The given function is f(x) = -2/3x +5.
To obtain f(-1/2), we must substitute the value of x with -(1/2).
f(x) = -2/3x +5
f(-1/2) = -2/3×(-1/2) + 5
f(-1/2) = (2/6) + 5
f(-1/2) = 0.333 + 5
∴ f(-1/2) = 5.3333
Therefore, the value of the function f(-1/2) obtained after substituting x = -1/2 is 5.333.
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Find the missing integer that makes the following addition statement true.
+ 3 = 2+3=2
The missing integer that makes the following addition statement true is -1.
What is the commutative law of addition?The commutative law of addition is also known as the law of cumulative addition and it states that when two numbers are added together, then, the outcome is equal to the addition of their interchanged position because addition is considered as a binary operation.
Mathematically, the commutative law of addition can be represented using the following formula:
A + B = B + A.
What is an integer?An integer can be defined as a whole number that may either be positive, negative, or zero such as -1, 0, 1, 2, 3, etc.
Now, we would determine the missing number:
x + 3 = 2
x = 2 - 3
x = -1.
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Complete Question:
Find the missing integer that makes the following addition statement true.
+ 3 = 2
The heights of 10 year old children has a normal probability distribution with mean of 54.6 inches and standard deviation of 5.7 inches. What is the approximate probability that a randomly selected 10-year old child will be more than 51.75 inches tall?
The approximate probability that a randomly selected 10-year-old child will be more than 51.75 inches tall is 0.6915.
How to calculate the probability?Probability refers to potential. A random event's occurrence is the subject of this area of mathematics. The range of the value is 0 to 1. From the information, the heights of 10-year-old children have a normal probability distribution with a mean of 54.6 inches and standard deviation of 5.7 inches.
Based on this, the probability that a randomly selected 10-year old child will be more than 51.75 inches tall will be:
P(X > 51.75)
= P(Z > [(number - mean) / standard deviation)]
= P(Z > [(51.75 - 54.6) / 5.7)]
= P(Z > -0.5)
= 1 - P(Z = -0.5)
This will be looked at in the z table.
= 1 - 0.3805
= 0.6915
Therefore, the probability is 0.6915.
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It cost Angel $6.75 to send 75 text messages. How much does it cost to send one text?
To know how much each message sent costs, knowing that 75 messages cost $6.75, we only have to divide the cost of the total of 75 text messages by the total number of the cost of the message,
So that:
$ 6.75 ➗75 text message = 0.09 $/text messagesWe say, that the cost of each text message is $0.09.
3000 for 2 years at 2% compounded quarterly
Based on the given parameters, the amount of the investment after 2 years is $3123
How to determine the amount?The given parameters about the compound interest are
Principal Amount, P = $3000
Interest Rate, R = 2%
Time, t = 2
Number of times, n = 4 i.e quarterly
Compound interests are different from simple interest, and they are calculated using the following compound interest formula
CI = P(1 + R/n)^nt - P
To calculate the amount, we have:
A = P + CI
So, the equation becomes
A = P + P(1 + R/n)^nt - P
Evaluate the like terms
A = P(1 + R/n)^nt
Substitute the known values in the above equation
A = 3000 * (1 + 2%/4)^(2 * 4)
Express 2% as decimal
A = 3000 * (1 + 0.02/4)^(2 * 4)
Evaluate the sum
A = 3000 * (1.005)^8
Evaluate the exponent
A = 3000 * 1.041
Evaluate the product
A = 3123
Hence, the value of the investment is $3123
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which value of a make the solution of the equation 3(2x-4) = 4(ax-2)
The value of a that makes the solution of the equation is 1/2.
Given,
The equation: 3(2x - 4) = 4(ax - 2)
Solve,
3(2x - 4) = 4(ax - 2),
Open the bracket and multiply:
6x - 12 = 4ax - 8
Add 12 to both sides
6x -12 + 12 = 4ax + 12 - 8
We get,
6x = 4ax + 4
Add - 4ax to both sides:
6x - 4ax = 4ax - 4ax + 4
We get,
6x - 4ax = 4
Take x = 1
Then,
6 × 1 - 4a × 1 = 4
6 - 4a = 4
Now,
Add - 6 to both sides
6 - 6 - 4a = 4 - 6
We get,
-4a = -2
That is,
4a = 2
a = 2/4 = 1/2
That is,
The value of a that makes the solution of the equation is 1/2.
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