What type of number is
- square root 81?
Select all that apply.
Whole number
Integer
Rational
Irrational
The square root of 81 is 9. Hence, it falls under the categories of Whole number, Integer, and Rational number since it can be a positive whole number without any fractional part and can be written as a ratio.
Explanation:The square root of 81 is 9. Now, considering the types of numbers, 9 is a Whole number, because it is not a fraction, and it does not have a decimal point. It is also an Integer, which are numbers that can be written without a fractional component, including both positive and negative whole numbers plus zero. Lastly, 9 is a Rational number, a number that can be written as a fraction. So, the square root of 81 is all three: Whole number, Integer, and Rational number. It is not an Irrational number, which is a number that cannot be expressed as a ratio of two integers.
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Final answer:
The square root of 81 is 9, which makes it a whole number, an integer, and a rational number. It is not an irrational number.
Explanation:
The type of number the square root of 81 is can be determined simply by calculating the square root. The square root of 81 is 9, since 9 multiplied by 9 equals 81. Now, let's classify this number:
Whole number: Yes, because whole numbers include all the non-negative numbers (0, 1, 2, 3...), and 9 falls into this category.
Integer: Yes, because integers are all whole numbers, both positive and negative, including zero (-3, -2, -1, 0, 1, 2, 3...), so 9 is also an integer.
Rational number: Yes, because rational numbers are ratios of integers (like 2/1 or -3/4), and 9 can be expressed as 9/1.
Irrational number: No, because irrational numbers cannot be expressed as ratios of integers. Examples of irrational numbers include √2 or π.
Therefore, the square root of 81 is a whole number, an integer, and a rational number, but it is not irrational.
Which transformation is not isometric?
To set up long division of polynomials, you should make sure that each polynomial is written in _____ order and has no missing terms. ...?
I guess there should be an options to choose. But I'm pretty sure that the answer is: To set up long division of polynomials, you should make sure that each polynomial is written in descending order and has no missing terms.
Expand and simplify 4 (2x-1) +3 (2x+5)
Also,
Find the first four terms and the 10th term
5-2n....
_ _ _ _......_
Which equation could be used to solve this problem?
Kate weighs 3 times as much as Jen. Their total weight is 140 pounds. How much does each girl weigh?
A) 140 = 3x
B) 3x + x = 140
C) 3x - x = 140
D) x - 140 = 3x
Answer:
B
Step-by-step explanation:
Samantha and Luis are attempting to determine how many library books each seventh grade student checks out at the same time. Samantha surveys every other seventh grade student leaving the library. She samples a total of 40 of the 200 seventh graders. Luis samples 30 of the 200 seventh grade students at random in the school cafeteria. Whose sample is the most random? Luis because his sample is taken from the population of all seventh graders Luis because he samples fewer students Samantha because she samples more students Samantha because her sample is taken from the population of students who use the library
Answer:
Luis, because his sample is taken from the population of all seventh graders. However, Samanthan has the advantage of having a bigger sample, and that makes it more representative.
Step-by-step explanation:
Taking the sample of the library as Samantha did, is biased, because most of the students there is checking a book, and the aim of the study is not only the ones that use the library, but in general the seventh grade students.
Is each line parallel, perpendicular, or neither parallel nor perpendicular to a line whose slope is -3/4?
Alice had 4 1/4 pounds of walnuts at the beginning of the week. At the end of the week, she had 2 3/4 pounds. How much has she used?
A. 1 3/4
B. 1 1/2
C. 2 1/2
D. 1 1/4
Step [tex]1[/tex]
Convert mixed numbers to improper fractions
we know that
[tex]4\frac{1}{4}=\frac{4*4+1}{4}=\frac{17}{4}[/tex]
[tex]2\frac{3}{4}=\frac{2*4+3}{4}=\frac{11}{4}[/tex]
Step [tex]2[/tex]
Find the difference of the numbers
[tex]\frac{17}{4}-\frac{11}{4}=\frac{6}{4}=\frac{3}{2}[/tex]
Step [tex]3[/tex]
Convert improper fraction to mixed number
[tex]\frac{3}{2}=1.5=1+0.5=1+\frac{1}{2} =1\frac{1}{2}[/tex]
therefore
the answer is the option B
[tex]1\frac{1}{2}[/tex]
Greg is in a car at the top of a roller-coaster ride. The distance, d, of the car from the ground as the car descends is determined by the equation d = 144 – 16t2, where t is the number of seconds it takes the car to travel down to each point on the ride. For which interval of time is Greg’s car moving in the air?
Consider the basis B of R2 consisting of vectors
5
-6
and
-2
-2
Find x in R2 whose coordinate vector relative to the basis B is
[x]B = [-6]
[ 2 ]
The idea is to find a linear combination a_1(5, -6) + a_2(-2, -2) = (-6, 2) It boils down to a system of equations: Take the augmented matrix:
[5−6−2−2−62] Reduced form: [1001−8111311] -(8/11)*(5, -6) + (13/11)*(-2, -2) = (-6, 2)Answer: The required vector x is
[tex]x=\begin{bmatrix}-\dfrac{8}{11}\\ \dfrac{13}{11}\end{bmatrix}[/tex].
Step-by-step explanation: Given that a basis B of R² consists of vectors (5, -6) and (-2, -2).
We are to find the vector x in R² whose co-ordinate vector relative to the basis B is [tex]\begin{bmatrix}-6\\ 2\end{bmatrix}[/tex].
Let us consider that a, b are scalars such that
[tex]a(5,-6)+b(-2,-2)=(-6,2)\\\\\Rightarrow (5a-2b,-6a-2b)=(-6,2)\\\\\Rightarrow 5a-2b=-6~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\-6a-2b=2~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)[/tex]
Subtracting equation (ii) from equation (i), we get
[tex](5a-2b)-(-6a-2b)=-6-2\\\\\Rightarrow 11a=-8\\\\\Rightarrow a=-\dfrac{8}{11}[/tex]
and from equation (i), we get
[tex]5\times\left(-\dfrac{8}{11}\right)-2b=-6\\\\\\\Rightarrow 2b=-\dfrac{40}{11}+6\\\\\\\Rightarrow 2b=\dfrac{26}{11}\\\\\\\Rightarrow b=\dfrac{13}{11}.[/tex]
Thus, the required vector x is
[tex]x=\begin{bmatrix}-\dfrac{8}{11}\\ \dfrac{13}{11}\end{bmatrix}[/tex].
How do you solve
x-3/(x-4) + 4= 3x/3
Nadia started at 19.26 feet below sea level and then changed her altitude by climbing a total of 5,437.8 feet up from her initial position. What was Nadia’s altitude at the end of her climb?
A. 3,511.8 feet above sea level
B. 5,245.2 feet above sea level
C. 5,418.54 feet above sea level
D. 5,457.06 feet above sea level
Answer:
The correct option is:
C. 5,418.54 feet above sea level
Step-by-step explanation:
Nadia started at 19.26 feet below sea level.
She then changed her altitude by climbing a total of 5,437.8 feet up from her initial position.
Her new position would be 5437.8-19.26 feet above the sea level
i.e. 5,418.54 feet above sea level
Hence, the correct option is:
C. 5,418.54 feet above sea level
Answer:
5,418.54
Step-by-step explanation:
the ordered pair (0,0)(1,4)(2,16)(3,36)(4,64). write a rule that represents the function.
The ordered pairs (0,0), (1,4), (2,16), (3,36), and (4,64) can be represented by the function y = x^2.
Explanation:The question involves a list of ordered pairs that represent a mathematical function. Here, the ordered pairs are (0,0), (1,4), (2,16), (3,36), (4,64). Through these pairs, we can see a relationship between the x-values (first number in each ordered pair) and their respective y-values (second number in each pair). Specifically, each y-value appears to be the square of its respective x-value. By noticing this pattern, we can write a rule that represents this function: y = x^2. This means that for any given x-value, you just need to square it to get its corresponding y-value.
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A rain gutter is made from sheets of aluminum that are 20 inches wide by turning up the edges to form right angles. Determine the depth of the gutter that will maximize its cross sectional area to allow the greatest amount of water to flow
To find the depth of the gutter that will maximize its cross sectional area, we can use optimization. We need to set up the area equation, differentiate it, find critical points, and determine the maximum area.
Explanation:To find the depth of the gutter that will maximize its cross sectional area, we need to use the concept of optimization. Let's assume the depth of the gutter is x inches. The width of the gutter would be 20 - 2x inches, as the edges are turned up to form right angles.
The cross-sectional area of the gutter would be x(20 - 2x) = 20x - 2x^2 square inches. To maximize this area, we can find the derivative of the area function with respect to x, set it equal to 0, and solve for x.
After finding the critical points, we can analyze which value of x gives the maximum area. Lastly, we can plug this value back into the area function to find the maximum area.
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Which of the following graphs represents the function f(x) = x4 - 2x3 - 3x2 + 4x + 1?
Answer: Graph D will be correct graph for the given function.
Explanation:
Given function [tex]f(x) = x^4-2x^3-3x^2+4x+1[/tex]
Since it is a bi-quadratic equation thus it must have 4 roots and (0,1) is one of its point.
Moreover, the degree of the function is even thus the end behavior of the function is[tex]f(x)\to+\infty[/tex], as [tex]x\to-\infty[/tex] and [tex]f(x)\to+\infty[/tex] as [tex]x\to+\infty[/tex]
In graph A, function has four root but it does not have the end behavior same as function f(x).( because in this graph [tex]f(x)\to-\infty[/tex], as [tex]x\to-\infty[/tex] and [tex]f(x)\to-\infty[/tex], as [tex]x\to+\infty[/tex].) so, it can not be the graph of given function.
In graph B, neither it has four root nor it has the end behavior same as function f(x).(because in this graph [tex]f(x)\to+\infty[/tex] as [tex]x\to-\infty[/tex] and [tex]f(x)\to-\infty[/tex] as [tex]x\to+\infty[/tex].) so, it can not be the graph of given function.
In graph C, neither it has four root nor it has the same end behavior as function f(x).(because in this graph [tex]f(x)\to-\infty[/tex] as [tex]x\to-\infty[/tex] and [tex]f(x)\to+\infty[/tex] as[tex]x\to\infty[/tex].) so, it also can not be the graph of given function.
In graph D it has four root as well as it has the same end behavior as the given function. Also it passes through the point (0,1).
Thus, graph D is the graph of given function.
solve logx + log(x-3) = 1
in the rectangle below, what is x?
there are 1176 students in central high school. there are 50 more girls than boys. how many boys are there.
Answer:
563
Step-by-step explanation:
Plato
Suppose that the area of a square is eight times its perimeter. find the length of a side of the square.
Final answer:
To solve the problem, an equation is set where the area of the square (a²) is equal to eight times its perimeter (8(4a)). Solving for a, we find the side length of the square to be 32 inches.
Explanation:
The student is presented with a problem where the area of a square is stated to be eight times its perimeter. Let the side length of the square be a inches. The area of a square is given by a², and the perimeter of a square is given by 4a. According to the problem, we have a² = 8(4a).
Firstly, we set up the equation based on the given information:
a² = 8(4a)
Solving for a:
a² = 32a
a² - 32a = 0
a(a - 32) = 0
Therefore, the side length a can be 0 or 32. Since the side length cannot be 0, the length of a side of the square is 32 inches.
Abbreviate 375,000 using scientific notation is what eactly?
If the purchase price for a house is $445,500, what is the monthly payment if you put 5% down for a 30 year loan with a fixed rate of 6.25%?
Answer:
The monthly payment is $2603.17
Step-by-step explanation:
The purchase price is = $445500
5% is down payment = [tex]0.05\times445500=22275[/tex]
Loan amount is = [tex]445500-22275=423225[/tex]
The EMI formula is = [tex]\frac{p*r*(1+r)^{n} }{(1+r)^{n}-1 }[/tex]
p = 423225
r = 6.25/12/100=0.0052
n = 30*12 = 360
Putting the values in the formula we get:
[tex]\frac{423225*0.0052*(1.0052)^{360} }{(1.0052)^{360}-1 }[/tex]
= $2603.17
The monthly payment is $2603.17 approx
Kesara Santiago purchased a riding mower for $2,746.00. She received a $49.95 rebate from the manufacturer and a $38.95 rebate from the store. What is the final price?
Answer: $2657.1
Step-by-step explanation:
Given: The price of a riding mower = $2,746.00
The amount she received by manufacturer as rebate= $49.95
The amount she received by the store as rebate = $38.95
The total amount she received as rebate =[tex]\$49.95+\$38.95=\$88.9[/tex]
Therefore, the final price of the riding mower is given by :-
[tex]\text{Final Price}=\$2746-\$88.95=\$2657.1[/tex]
4. A video game sells at Arnolds for $14.99. Arnold's marks the game up at 40% of the selling price. What is the cost of the game to Arnold?
A. $6.00 B. $9.10 C. $6.50 D. $8.99
Answer:
8.99
Step-by-step explanation:
Find the smallest positive angle θ in the third quadrant for which tan(θ) = 1.
...?
What is 2.5 in expanded and word form?
The polynomial given below has _____ root(s).
2x2 + 5x + 2
A. two complex
B. two positive
C. two negative
D. one positive and one negative
...?
Question 2:
Calculate the average rate of change for the function f(x) = −x^4 + 4x^3 − 2x^2 + x + 1, from x = 0 to x = 1.
A. 0
B. 1
C. 2
D. 7
Use the rule 4x to find the missing number on the table.
X Y
0 0
2 8
5 20
7
10 40
Answer: The missing number would be 28.
Step-by-step explanation:
Use the rule
4
to find the missing number on the table.
x y
0 0
2 8
5 20
7 28
10 40
7*4=28.
What fraction is greater than 1/2. 4/6 3/8 1/3 2/5?
Find the ordered pairs for the x- and y-intercepts of the equation 3x − 2y = 18 and select the appropriate option below.
The x-intercept is (0, 6); the y-intercept is (–9, 0).
The x-intercept is (6, 0); the y-intercept is (0, –9).
The x-intercept is (3, 0); the y-intercept is (0, –2).
The x-intercept is (0, 3); the y-intercept is (–2, 0).
Answer:
The x-intercept is (6, 0); the y-intercept is (0, –9).
Step-by-step explanation: