The set of natural numbers is closed under addition but not under subtraction.
Explanation:The statement that is true for the set of natural numbers is B. The set is closed under addition and not closed under subtraction.
In mathematics, a set is considered closed under an operation if applying that operation to any two elements in the set always produces an element that is also in the set.
For the set of natural numbers, adding two natural numbers will always result in another natural number, so it is closed under addition. However, subtracting two natural numbers may result in a negative number, which is not a natural number, so it is not closed under subtraction.
Write 6 ×10000 5×1000 2×100 3×1 as a number.
In a company 60% of the workers are men is 880 women work for the company how many workers are there in all
A flagpole is located at the edge of a sheer y = 70-ft cliff at the bank of a river of width x = 40 ft. See the figure below. An observer on the opposite side of the river measures an angle of 9° between her line of sight to the top of the flagpole and her line of sight to the top of the cliff. Find the height of the flagpole.
8.) A linear equation has more than one y-intercept. What can you conclude about the graph of the equation??
Help Idk this question!!
Please help me it is one of my math homework questions!!
Answer:
Step-by-step explanation:
A straight line can either have 1 y-intercept or infinitely many y intercepts. The only case in which there are infinitely many y-intercepts is when the line represents the y-axis itself. On y-axis, x is always 0. So the line that represents the y-axis is the line x=0. However, it is not a linear equation. In short, only the line representing y-axis has more than 1 y-intercepts. There cannot be such a linear equation(function).
A linear equation cannot have more than one y-intercept. Having multiple y-intercepts would violate the definition of a function as each input (x-value) should only be associated with one output (y-value). Therefore, a linear equation with multiple y-intercepts suggests an error.
Explanation:In the field of mathematics, specifically in algebra and graphing, a linear equation cannot have more than one y-intercept. The y-intercept of a linear equation is the point at which the line crosses the y-axis on a coordinate plane. Linear equations are represented by the formula y = mx + b, where 'm' is the slope of the line and 'b' is the y-intercept. If an equation were to have more than one y-intercept, it would violate the definition of a function, which states that each input (or x-value) is only associated with one output (or y-value). Hence, if a linear equation was portrayed as having more than one y-intercept, it would imply an error in the equation or in the graph itself.
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how do you find the equation of a triangles altitude using point slope formula?
Use the quadratic formula to solve the equation. 4x^2+9x-10=0
Jack and Walter work in a store's gift-wrapping department. Jack can wrap 28 boxes in 2 hours, while Walter takes 3 hours to wrap 36 boxes of the same size. One day they work together for t hours to gift wrap 65 boxes. Which equation models this situation?
Answer: They work for 2.5 hours to gift wrap 65 boxes.
Step-by-step explanation:
Since we have given that
Number of boxes Jack can wrap = 28
Time taken by him = 2 hours
Number of boxes Walter can wrap = 36
Time taken by him = 3 hours
Work done by Jack in 1 hour is given by
[tex]\frac{2}{28}\\\\=\frac{1}{14}[/tex]
Work done by Walter in 1 hour is given by
[tex]\frac{3}{36}\\\\=\frac{1}{12}[/tex]
So, Work done by both Jack and Walter in 1 hour is given by
L.C.M. of [tex](\frac{1}{14},\frac{1}{12})[/tex] is [tex]=\frac{l.c.m.\ of \ numerator}{h.c.f\ of\ denominator}=\frac{1}{2}[/tex]
Number of units done by Jack is given by
[tex]\frac{\frac{1}{2}}{\frac{1}{14}}\\\\=\frac{14}{2}\\\\=7\ units[/tex]
Number of units done by Walter is given by
[tex]\frac{\frac{1}{2}}{\frac{1}{12}}\\\\=\frac{12}{2}\\\\=6\ units[/tex]
So, Let the number of hours be 't' .
[tex]7t+6t=\frac{1}{2}\times 65\\\\13t=\frac{1}{2}\times 65\\\\t=\frac{1}{2}\times \frac{65}{13}\\\\t=\frac{5}{2}\\\\t=2.5\ hours[/tex]
So, They work for 2.5 hours to gift wrap 65 boxes.
mBAC = 22.21°
mABC = 137.67°
mBCA = 20.12°
Classify the triangle by its angles
Each of the 25 student in mr mcdounld class sold 16 tickets if each ticket costs15$ how much money did the students raise
Find x and y. Remember that a + bi = c + di exactly when a = c and b = d. 8 = (4+8i)(x+yi)
Jose has had his eye on a pair of basketball shoes at a shoe store for a long time, but at a price of $150, the shoes have always been a little bit more than his budget could handle. However, today he saw a sign in the window that said, "Basketball Shoes – 20% off." Which type of discount is this?
A. A sale
B. A coupon
C. A rebate
D. A gift card
This type of a discount is:
A. A sale
Step-by-step explanation:Sale--
A sale is a transaction between two parties one is a buyer and other is seller in which the goods or services are provided by the seller at a lower rate as compared to the normal price of it.
The price so lowered is known as a discounted price and the price at which the item is to be sold is known as a sale price.
Here the store is keeping the basketball shoes at a sale which is displayed on window as:
"Basketball Shoes – 20% off."
Hence, the correct option is: Option: A
A. A sale
Find the sum of 86, 331, and 909.
Your class is selling boxes of flower seeds as a fundraiser. The total profit p depends on the amount x that your class charges for each box of seeds. The equation p equals negative 0.5 x squared plus 36 x minus 141p=−0.5x 2+36x−141 models the profit of the fundraiser. What's the smallest amount in dollars that you can charge and make a profit of at least $471?
Please help. ASAP!!!
What is 20x346 equal ??
please helpppppp!!!!!
How far does the first car will drive in the 2 hours head start it gets? Now, at t = 2 hours, both cars are moving. How much faster is the second car than the first car? You can determine this by dividing the head start by the difference in the two speeds. If car 1 has a 20-mile head start, and car two is five mph faster, then it will take 20/5 = 4 hours to catch up.
5(x+2)= -2(x+9) equals?
Line QR goes through points Q(0, 1) and R(2, 7). Which equation represents line QR?
a. y – 1 = 6x
b. y – 1 = 3x
c. y – 7 = 2x – 6
d. y – 7 = x – 2
The Answer is B.
I took the unit review, as well as did the math myself,
1.In the metric system, the base unit for mass is the
gram
liter
kilogram
kiloliter
2.Which of the following is the largest distance?
Centimeter
Millimeter
Decimeter
Kilometer
3.Which of the following prefixes represents the smallest number?
Centi
Kilo
Milli
Deci
4.All of the following measure mass except
milligram
kilogram
decigram
centimeter
5.What is a metric base unit?
The standard unit that is used for each type of measurement.
The smallest unit in the metric system.
The largest unit in the metric system.
The best unit for measuring what you want to measure.
Change this radical to an algebraic expression with fractional exponents.
√x^3
Final answer:
To express[tex]\(\sqrt{x^3}\)[/tex] as a fractional exponent, it is rewritten as[tex]\(x^{\frac{3}{2}}\),[/tex] correlating the square root operation to the power of \[tex](\frac{1}{2}\)[/tex]and multiplying by the exponent 3.
Explanation:
To change the radical[tex]\(\sqrt{x^3}\)[/tex]to an algebraic expression with fractional exponents, we can use the property that any root can be expressed as a power with a fractional exponent. The square root of a variable to some power can be represented by raising the variable to the power of half the original exponent.
In this case,[tex]\(\sqrt{x^3}\)[/tex]can be written as [tex]\(x^{\frac{3}{2}}\).[/tex] This is because the square root operation is equivalent to raising to the power of[tex]\(\frac{1}{2}\),[/tex] and when we multiply the exponents [tex]\(3 \times \frac{1}{2}\),[/tex] we get[tex]\(\frac{3}{2}\).[/tex]
Factor 5x^3 40x^2 - 100x
Write3/4 3/6 1/3 and 2/12 from least to greatest
write an equation in point slope form for the line through the given point with the given slope
(8,3) m =5
A. Y+3=5(x-8)
B. Y+3=5x-8
C.y-3=5(x-8)
D.y-3=5(x+8)
Option C is correct, y-3=5(x-8) is the equation in point slope form for the line through the given point with the given slope
What is Slope of Line?The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.
The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.
The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is
m=y₂-y₁/x₂-x₁
The point slope form of a line is y-y₁=m(x-x₁)
We need to find equation in point slope form for the line through the given point (8,3) with the given slope m =5
y-3=5(x-8)
Hence, option C is correct, y-3=5(x-8) is the equation in point slope form for the line through the given point with the given slope
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Divide 456 by 28 and write the answer
A. As a mixed number
B. As a decimal rounded to teo decimal places
C. Rounded to the nearest whole number
(Please look at answers below and tell me if correct or if wrong how to fix it)
...?
The results of the expression are 8 2/7 ; 16.286 and 16 respectively.
Using the expression given :
456 / 28Now we divide:
A.)
456 / 28 = 16 remainder 8
Now we have :
8 8/28
= 8 2/7
B.)
As a decimal :
456 / 28
= 16.286
C.)
Rounded to the nearest whole number:
456 / 28
= 16.286
≈ 16
Final answer:
To divide 456 by 28: as a mixed number is 16 2/7, as a decimal rounded to two places is 16.29, and to the nearest whole number is 16.
Explanation:
To divide 456 by 28, we start by performing the division to find the quotient and the remainder. Firstly, 456 divided by 28 equals 16 with a remainder of 8.
Answering the three parts:
A. As a mixed number, we have 16 and 8/28. Simplifying the fraction 8/28 to its lowest terms, we get 2/7. Thus, the mixed number is 16 2/7.B. To express the quotient as a decimal rounded to two decimal places, 456 divided by 28 equals approximately 16.29.C. The quotient, rounded to the nearest whole number, is 16.The information provided seems to be examples of rounding and significant figures from various arithmetic operations but does not directly relate to the division of 456 by 28, which is our primary focus. Please note that while rounding to the nearest whole number or to two decimal places, it's important to correctly evaluate the quotient that the specific calculation yields.
Solve the problem. Round to the nearest hundredth of a percent if needed. During clinical trials of a new drug intended to reduce the risk of heart attack, the following data indicate the occurrence of adverse reactions among 1100 adult male trial members. What is the probability that an adult male using the drug will experience nausea?
A. 2.02%
B. 1.73%
C. 27.59%
D. 2.18%
HELP ME PLEASE?Choose the correct statement about best-fit lines.
a. A best-fit line is close to most of the data points.
b. A best-fit line describes the exact coordinates of each point in the data set.
c. A best-fit line always has a positive slope.
d. A best-fit line must go through at least two of the data points.
What statement about the equation is true? 3(4x-2)=12x
A. The equation has one solution
B. The equation has no solution
C. The equation has a few solutions
D. The equation has many solutions
Find a polynomial of degree n that has the given zeros. (There are many correct answers.)
zeroes: x=-1,5,7
degree: n=3
What's the account balance after 6 years when you invest$1600 with interest rate of 6.5% compounded continuously
Answer:the answer is the one given below, you need to use A=Pe^rt
Step-by-step explanation:
P= amount of money invested
r=interest rate percentage in decimal form
t=time in years
A=total money in account ️
Which statement is an example of the Identity Property of Multiplication?
8 • 0 = 0
8 • 1 = 8
8 • –1 = –8
–8 • –1 = 8
Option 2 - 8 x 1 = 8 is the correct alternative.
We have the options as mentioned in the question.
We have to determine which is an example of Identity Property of Multiplication.
What is Identity Property of Multiplication ?The identity property of multiplication says that the product of 1 and any number is that number.
According to the question -
Using the Identity Property of Multiplication -
8 x 1 = 8
Hence, Option 2 is the correct alternative.
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