Let:
A = students who passed the test = 14
B = students who completed the assignment = 13
N = Total students = 22
(A⁺ ∩ B⁺) = 6
P(A ∪ B) = 1 - 6/22 = 8/11
P(A ∩ B) = P(A) + P(B) - P(A ∪ B) = 14/22 + 13/22 - 8/11 = 1/2
P(A|B) = P(A ∩ B)/P(B) = (1/2)/(13/22) = 11/13 ≈ 0.85 ≈ 85%
If you wanted to take a simple random sample for a study on screen time in elementary school students in your town, which describes the sample you would ask?
twenty students from one elementary class in your town
twenty students from each elementary school in your town
twenty students that are friends from an elementary school in your town
twenty students that are friends from each elementary school in your town
The option that describes the sample you would ask is A. twenty students from one elementary class in your town.
What is a simple random sampling?It should be noted that a simple random sampling simply means a form of sampling whereby everybody has an equal chance of being selected.
In this case, it should be noted that the person wanted to take a simple random sample for a study on screen time in elementary school students in the town. Therefore, twenty students can be chosen to illustrate this.
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In 1992, a postage stamp cost $0.25. In 2004, a postage stamp cost $0.37. What is the average rate of change in postage cents per year?
Answer: 0.01 (One cent per year)
Step-by-step explanation:
We need to find the price the stamp increased per year.
The difference in years is 12.
2004 - 1992 = 12
The difference in price is 0.12.
0.37 - 0.25 = 0.12
So to find price increase per year we do the following:
$0.12/12 = 0.01
$0.01 is one cent per year.
Work out the missing numbers:
b) 10.2 +
= 0.8
Answer: -11
Step-by-step explanation:
The function f(t)=16t2 represents the distance (in feet) a dropped object falls in t seconds. The function g(t)=s0 represents the initial height (in feet) of the object. A necklace is dropped from a height of 64 feet. After how many seconds does the necklace hit the ground?
By solving a quadratic equation, we will see that the necklace hits the ground 2 seconds after it is dropped.
After how many seconds the necklace hits the ground?We know that the function:
f(t) = 16*t^2
Represents the distance that an object falls down in t seconds.
If the necklace is dropped from a height of 64 feet, the necklace will hit the ground when the distance that an object falls down in t seconds is equal to 64 feet, so we just need to solve the quadratic equation:
f(t) = 64
16*t^2 = 64
t^2 = 64/16 = 4
t = √4 = 2
The necklace will hit the ground after 2 seconds.
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James and Lucas are eating a pizza. James ate 2/3 of the pizza and Lucas ate 1⁄4 of pizza. Who ate more pizza and by how much?
Answer: James ate more pizza by 5/12 parts.
Step-by-step explanation:
To solve let us takes the lcm of the denominators 3 and 4
which is 12.
James ate 2/3 * 4/4 = 8/12 parts
Lucas ate 1/4*3/3= 3/12 parts
now, we can see 8/12>3/12
Therefore, James ate more pizza by 8/12-3/12= 5/12 parts.
the probability that a fair die falls on 6 is 1/6. however, if that fair die is one of two dice, and you know that the sum of the two dice is 12, then the probability that the fair die fell on 6 is ?
Answer:36
Step-by-step explanation:
1/6 is 6
so we need to find 6/6 which would be 6×6=36
Your hotel has been reviewed on yelp 10 times you received the following ratings 4,5,5,3,5,4,2,3 what is your overall rating
The overall rating is 31 and the average rating is 3.8.
What is average?A large number of data points are reduced into a single value using averages. It is a visual depiction of all the data set's available numbers. The average is derived by adding up all the data values and dividing them by the total number of data points.
The word "average" is used in many different contexts in daily life. The average is computed and a single value is used to represent the values for quantities with fluctuating values.
Overall rating = 4+5+5+3+5+4+2+3
Overall rating = 31
Average rating = Overall rating/ Total number of ratings
= 31/8
= 3.8
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Is the equation a true statement when x = 3? In other words, is 3 a solution to theequation?7x – 5 = 23 + 10A. Yes, 3 is a solution.B. No, 3 is not a solution.
SOLUTION:
Case: Simple equation
Given:
7x – 5 = 23 + 10
Required:
Is the equation a true statement when x = 3?
Method:
Step 1: Rewrite the equation
7x – 5 = 23 + 10
Step 2: Plug the value x= 3 into the equation
7x – 5 = 23 + 10
7(3) - 5 = 33
21 - 5 = 33
16 is not equal to 33
Final answer:
B. No, 3 is not a solution.
Which postulate could we use to prove that the angles
Answer:
PWP (Part Whole Postulate)
Step-by-step explanation:
Supplementary angles add up to 180 degrees. The part whole postulate states that two angles make up a whole.
Answer:
Supplement postulate
Step-by-step explanation:
Supplement Postulate:
If two angles form a linear pair, then they are supplementary.
Find the equation of the line that passes through (-3,1) and is parallel to
y
=
4
−
3
x
.
Leave your answer in the form
y
=
m
x
+
c
Answer:
y=3x-5
Step-by-step explanation:
parallel lines have the same slope
Please help asap, I will give brainliest
Answer:
the answer is A
Step-by-step explanation:
To check your answer, move 4 units to the right and 3 units up
what is (x squared -4x+3)-(3x squared -3x -5)
Jason is in the business of manufacturing phones. He must pay a daily fixed cost of $500 to rent the building and equipment, and also pays a cost of $150 per phone produced for materials and labor. Make a table of values and then write an equation for C,C, in terms of p,p, representing total cost, in dollars, of producing pp phones in a given day.
Total cost of phone in a day $650
What is Algebra ?
One of the many branches of mathematics is algebra. Algebra, which is a common thread throughout practically all of mathematics, is broadly defined as the study of mathematical symbols and the rules for using these symbols in formulas.
Total cost of rent in a day = $500
Total cost of per phone = $150
The equation which represents values in term of c:
150p + 500 = C
The total cost he had in a day :
= 150 + 500
= $650
Hence, the total cost throughout the day is $650
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6. There are 45 cans of mixed nuts. Each
can has 338 nuts. Below is Mary's work
to find the total number of nuts.
The total number of nuts is 15210 and the missing number is 5
Number of cans of mixed nuts = 45 cans
Number of nuts in each can = 338 nuts
The fundamental concept of repeatedly adding the same number is represented by the process of multiplication. The results of multiplying two or more numbers are known as the product of those numbers, and the factors that are multiplied are referred to as the factors.
Finding the total number of nuts we get:
Total number of nuts = Number of cans*Number of nuts in each can
[tex]338\\*45\\= 1690\\+ 13520\\= 15210[/tex]
So, the missing number is 5
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Given m||n, find the value of x.
Answer:
kt
49
O
xº
Submit Answer
x° = 49°
What are alternate angles?Alternate interior angles are formed when two parallel lines are cut by a transversal and the pair of angles formed on the inner side of the parallel lines, but on the opposite sides of the transversal. These angles are equal.
Pairs of alternate angles around the transversal are equal to each other. Angles can either be alternate interior or exterior angles. Sum of the angles formed on the same side of the transversal of the two parallel lines is equal to 180°.
Given , ∠t = 49°,
Therefore angles x° will also 49° because alternate angles are equal when two parallel lines are cut by a transversal.
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Choose the answer that best completes the sentence.
-2 - √3i is a known root not a possible root, option 4 will be the correct answer.
What are real and imaginary roots ?
A real root to an equation is a real number. A complex root to an equation is an imaginary root represented as complex numbers.
In other words real roots can be represented in a number line where as imaginary roots can not.
Here, the given root is -2 + √3i :
It is known that the complex roots comes in pairs that is in form a ±ib, where, a is real part of imaginary root and b is imaginary part.
Therefore, the other root will be -2 - √3i.
So, -2 - √3i is a known root not a possible root, option 4 will be the correct answer.
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Determine the values of x in the equation x2 = 81.
A. x = −9
B. x = ±9
C. x = ±40.5
D. x = 40.5
Answer:
The Answer Is C X = 40.5
Step-by-step explanation: Half of 81 = 40.5 and 40.5 x 2 = 81 (x only multiplies 40.5 by 2 which equals 81)
What is d to the power of 6 and d to the power of 0 equal together?
The value of d to the power of 6 and d to the power of 0 equal together is d^6.
What is an exponent?The exponent is the number of times that a number is multiplied by itself. It should be noted that the power is an expression which shows the multiplication for the same number. For example, in 6⁴ , 4 is the exponent and 6⁴ is called 6 raise to the power of 4.
The information given regarding the power is illustrated thus:
d^6 + d^0
In this case, the addition of the power will be 6 + 0 = 6. Therefore, the value is d^6.
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Line a is parallel to line b. If the
measure of 2 is 78°, what is the
measure of 5?
78=21
34
65
78
→ а
b someone actually help
Answer:
102 degrees
Step-by-step explanation:
m<6 = 78,
m<5 = 102
:]
help me pls!
1. Which kind of model do you think best represents the profit for each business?
2. Find a function that models the profit you can expect, based on your projections, for each business. You can round your values to the nearest thousandth, as needed.
From the table given:
1. The type of function that best models each situation is:
D: Exponential.H: Linear.L: Quadratic.2. The functions are given as follows:
D: [tex]D(t) = 3.738 \times (1.749)^t[/tex]H: H(t) = 11.771t - 4.533.L: L(t) = -5.875t² + 30.582t + 116.9.Item 1For this problem, we have that each month, the amount increases, but the increase is approximately a factor of the previous amount, meaning that an exponential equation best models the data.
The points are given as follows:
(1, 5), (2, 12), (3, 23), (4, 50), (5, 62), (6, 80).
Using an exponential regression calculator, the equation is:
[tex]D(t) = 3.738 \times (1.749)^t[/tex]
Item 2For this problem, we have that each month, the amount increases, but the increase is approximately a constant from previous amount, meaning that an linear equation best models the data.
The points are given as follows:
(1, 11), (2, 19), (3, 29), (4, 38), (5, 50), (6, 73).
Using a linear regression calculator, the equation is:
H(t) = 11.771t - 4.533.
Item 3The amount initially increases, then it decreases, meaning that a quadratic model best represents the data.
The points are given as follows:
(1, 142), (2, 150), (3, 165), (4, 141), (5, 120), (6, 91).
Using a quadratic regression calculator, the equation is:
L(t) = -5.875t² + 30.582t + 116.9.
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translate the following into a equation: the product of five and a number is the quotient
(-) of six and the same number
The equation for the given sentence is 5x = 6/x
Given,
The product of five and a number is the quotient of six and the same number.
We have to translate this sentence into an equation:
Equation:
The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.
So here,
The product of five and a number is the quotient of six and the same number
We can take the number as x.
Then,
5 × x = 6 ÷ x
5x = 6/x
Multiply x on both sides
5x × x = 6/x × x
We get,
5x² = 6
Divide both sides with 5
5x²/5 = 6/5
We get,
x² = 6/5
x = √6/5
That is, the equation for the given sentence is 5x = 6/x
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during december the average daily temperature in a town is -1.7.the average daily temperature in the same town is 3.2 lower in january what is the average daily temperature in january?
Answer:
the average daily temperature in January is -4.9
Question 5(Multiple Choice Worth 1 points)
(01.05 LC)
What is the converse of the following statement?
"If the shoes are clean, then the shoes are new."
O If the shoes are not clean, then the shoes are not new.
O If the shoes are clean, then the shoes are not new.
O if the shoes are not new then the shoes are not clean.
O If the shoes are new, then the shoes are clean.
The converse of the statement on shoes being clean and new is If the shoes are new, then the shoes are clean.
How to write a converse statement?When converting a statement that involves two clauses to a converse statement, you should exchange the position of the two clauses to make a converse statement.
This means that if you had a statement as (if a then b) the converse statement is (if b than a). The statement, "If the shoes are clean, then the shoes are new" would then be "If the shoes are new, then the shoes are clean."
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there are 3 sides to a triangle 1 measures 115 and the other 2 are x what is x. write and solve an equation
If one angle of a 3-sided triangle measures 115° and the other two angles measure "x" degrees each, then the equation to be solved to obtain the value of "x" is [(115 + 2x) = 180] and the value of "x" will be 32.5°.
As per the question statement, one angle of a 3-sided triangle measures 115° and the other two angles measure "x" degrees each.
We are required to determine a Linear equation of singular value that can describe our concerned situation, and solving which, we will be able to obtain our desired value of "x".
To solve this question, we need to know about one basic yet very important property of a triangle, that is, the sum of all the three interior angles of a triangle is equal to 180 degrees.
Here, the three angles measure 115°, x° and x°.
Therefore, our required equation will [(115 + x + x)° = 180°]
or, [(115 + 2x)° = 180°]
Now solving the above mentioned equation to obtain the value of "x", we get, [(115 + 2x)° = 180°]
Or, [2x = (180 - 115)°]
Or, (2x = 65°)
Or, x = (65/2)°
or, x = 32.5°
Equations: In Mathematics, an equation is a statement that expresses the relation of equation between two separate expressions (of numbers and/or variables) connected by an "equal to" sign.To learn more about Equations, click on the link below.
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In the figure below, points D, E, and F are the midpoints of the sides of ABC. suppose DF =34, AC =48, and BC =78. find the following lengths.
For any given Triangle ABC, its medial triangle is constructed by finding the midpoints of its three sides (Segments AB, BC, and AC) and constructing segments to join these midpoints.
An important property of the medial triangle is that it divides the original triangle into four smaller, congruent triangles that are each similar to the original triangle.
With this in mind we now that the four triangles are congruent. Then:
[tex]CF=DE[/tex]but we know that CF is half of BC, then:
[tex]DE=\frac{78}{2}=39[/tex]From the figure we also notice that:
[tex]\begin{gathered} BE=DF \\ BE=34 \end{gathered}[/tex]Ans that AB is twice BE, then
[tex]AB=68[/tex]Summing up we have:
[tex]\begin{gathered} DE=39 \\ AB=68 \\ BE=34 \end{gathered}[/tex]I don’t understand my check of solution for the equation ^4√x+12=15 with x=81 and how it becomes 15 if √81 is 9
three times the sum of a number and seven is greater than five times the number less thirteen in a equation
Make a table of ordered pairs for the equation.
y=-1/3x+1
show steps and pic of the quiz graph pls!
The ordered pairs (-3, 2), (0, 1), (3, 0), and (6, -1) for the equation y = -1/3x+1 which satisfies the equation.
What is a graph?A graph can be defined as a pictorial representation or a diagram that represents data or values.
We have been given the equation:
y = -1/3x+1
When substituting the value x = -3, then get the value of y = 2
When substituting the value x = -0, then get the value of y = 1
When substituting the value x = 3, then get the value of y = 0
When substituting the value x = 6, then get the value of y = -1
The table of ordered pairs for the given equation y = -1/3x + 1.
x y
-3 2
0 1
3 0
6 -1
The required graph has been attached below which represents the given equation.
Therefore, the ordered pairs (-3, 2), (0, 1), (3, 0), and (6, -1) for the equation y = -1/3x+1 which satisfies the equation.
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Select whether the model is an angle of elevation or an angle of dep270 ITCMathBits.comB
Explanation:
The term angle of depression is defined as the angle from the horizontal line downward to an object. An observer's line of sight would be below the horizontal.
For angle of elevation, an observer's line of sight would be above the horizontal.
According to the diagram shown; The diagram with angle 27degrees models angle of depression while that of angle 25 degrees models an angle of elevation.
The ground temperature at an airport is 11 °C. The temperature decreases by 7 °C for every increase of 1 kilometer above the ground. What is the temperature outside a plane flying at an altitude of 5 kilometers?
The temperature outside a plane flying at an altitude of 5 kilometers is
°C.
Under the linear assumption of temperature and altitude, the temperature outside the plane is - 24 °C.
What is the temperature outside a plane flying at a given altitude?
In this problem we must determine the temperature outside the plane on the assumption that the temperature decreases linearly with the altitude:
T(z) = T' + (ΔT / Δz) · z
Where:
T' - Temperate at ground level, in degrees Celsius.Δz - Level change, in kilometers.ΔT - Temperature change, in degrees Celsius.If we know that T' = 11, Δz = 1 and ΔT = - 7, then the temperature at an altitude of 5 kilometers is:
T(5) = 11 + (- 7 / 1) · 5
T(5) = 11 - 35
T(5) = - 24
The temperature outside the plane is - 24 °C.
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