Answers
a. The square roots and square cancel each other so 5 × 3 = 15
b. The cube roots and cubes cancel each other so 9 × 30 = 270
What are square and cube roots?For math students, especially those in class 8, the square root and cube root concepts are the most crucial. In order to get the square root of any integer, we must first identify a number that, when multiplied twice by itself, equals the original number.
Similar to this, we must locate a number that, when multiplied three times by itself, equals the original number in order to get the cube root of any number.
The cube root is represented by the sign "√," whereas the square root is represented by the symbol "∛."
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Related Questions
Solve for x: 2^4x + 2^4+3 = 144
Answers
make factor
(1+2^3)2^4x=144
2^3=8, put it in the equation
(1+8)2^4x=144
(9)2^4x=144
divide both sides by 9
2^4x=16
write 16 in exponential form so that bases become same
2^4x=2^4
cancel 2 from both sides
4x=4
x=4/4
x=1
Find the coordinates of the circumcenter of the triangle with the given vertices. Explain.
A(0,0), B(0,6), C(10,0)
Answers
The triangle with vertices A(0 , 0), B(0 , 6), and C(10 , 0) has its circumcenter located at (5 , 3).
Circumcenter of a triangle refers to the point inside a triangle at which the perpendicular bisectors of the sides of a triangle intersect. This point is also equidistant from the three vertices.
Given the location of the three vertices, there are different methods that can be used to locate the circumcenter of the triangle.
First, try to graph and visualize the triangle formed by the three vertices. (see photo)
From there, we can say that triangle ABC is a right-angled triangle with line BC as the hypotenuse.
One of the properties of the circumcenter of a triangle states that the circumcenter lies in the middle of a hypotenuse if it is a right-angled triangle.
To get the circumcenter, find the midpoint of the line BC.
midpoint = M(xm ,ym) = [(x1 + x2)/2 , (y1 + y2)/2]
M(xm ,ym) = [(0 + 10)/2 , (6 + 0)/2]
M(xm ,ym) = (5 , 3)
Hence, the circumcenter is located at (5 , 3).
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do i set them equal to each other?
Answers
Check out the attached photo
one half a number is 17 more than one third of that number.what is the number?
Answers
Answer:
102
Step-by-step explanation:
Let x equal the unknown number
x/2 = 17 + x/3
3x = 102 + 2x
x = 102
Last year, there were 123 pies baked for the bake sale. This year, there were b pies baked. Using b, write an expression for the total number of pies baked in the two years.
Answers
A local office supply store charges $18 to set up their business card printing machine with the design and $0.15 in materials per business card to print. Select all equations that could represent an expression for the average cost A(x) of printing a batch of x business cards.
a
b
c
d
e
f
Answers
The equation [tex]A(x)=\frac{18+0.15x}{x}[/tex] represents the correct expression for the Average cost.
What is a mathematical expression?
In mathematics, an expression or mathematical expression is a finite collection of symbols that is well-formed according to context-dependent norms. Mathematical symbols can represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to aid in determining the sequence of operations and other features of logical grammar.
The store charges $18 for design setting and $0.15 per print out of business card.
Let the number of cards be [tex]x[/tex]
Then, total cost of printing of [tex]x[/tex] cards = $ [tex]0.15x[/tex]
Thus, the expression for the average cost [tex]A(x)[/tex] is given as,
[tex]A(x)=\frac{18+0.15x}{x}[/tex]
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The sides of a triangle have lengths x, x+5 , and 25 . If the length of the longest side is 25, what value of x makes the triangle a right triangle?
Answers
The value of x makes the triangle a right triangle is 15 .
Pythagoras Theorem states that sum of square of two sides of triangle is equal to the square of longest side of the right angle triangle.
In the given question
the length of longest side = 25.
length of other two side= x and x+5.
By Pythagoras Theorem
[tex]x^{2} +(x+5)^{2} =25^{2}[/tex]
[tex]x^{2} +x^{2} +25+10x=625[/tex]
[tex]2x^{2} +10x-600=0[/tex]
[tex]2x^{2} +40x-30x-600=0[/tex] ( By Splitting the middle term)
[tex]2x(x+20)-30(x+20)=0\\ \\ (2x-30)(x+20)=0\\[/tex]
solving 2x-30=0 and x+20=0
we get x=15 and x= -20 ( not possible as distance can't be negative)
x=15.
Therefore , the value of x makes the triangle a right triangle is 15 .
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Find the 32 nd term of each sequence. 101,105,109,113, ...........
Answers
The arithmetic sequence AP's 32nd term is calculated to be 225.
What is the definition of an AP arithmetic sequence?An arithmetic progression (AP) in mathematics is a list and maybe sequence of numbers with each term is obtained by adding a sequence to the term before it.
With the exception of arithmetic progression, the fixed number is denoted by the letter 'd.'Common difference => d = a2 - a1 = a3 - a2 = a4 - a3 =...... = a - an-1.nth term of an AP: an = a + (n - 1) dThe sum of n terms of an AP's => Sn = n/2(2a+(n-1)d) = n/2(a + l), where l = last term of the AP.Finally, the solution to the question is as follows:
The numbers in the displayed sequence are as follows:
101,105,109,113, ...........
We must explore the 32nd number in the series because it contains 32 terms.
The common difference with both two consecutive terms of an AP which are equal is denoted by 'd.'
Let's assume the first term is'a₁' = 101.
Let's assume 'a₂' = 105 is the second term.
Let's assume the third term is 'a₃' = 109
Substitute the values the preceding equation; the 32nd term is-
d = a₂ - a₁
Obtain the common difference;
d = 105 - 101
d = 4
Put the values in the preceding formula; the 32nd term is
The formula finds the nth term equation;
nth term of an AP: an = a + (n - 1) dTotal number of terms is; n = 32Initial term is a = 101Common difference d = 4Put the given values in nth term formula;
a₃₂ = a + (n - 1) d
a₃₂ = 101 + (32 - 1)(4)
a₃₂ = 101 + 128 - 4
a₃₂ = 225
Thus, the 32nd term value of the arithmetic sequence is calculated to be 225.
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Is the relation y=-3x with inputs x=0, x=1, and x=2 a function?
Answers
The relation is a function because it is a one-to-one relation
How to determine if the relation is a function?The relation is given as
y = -3x
The inputs are given as
x = 0, x = 1 and x = 2
Substitute the values of x i.e. x = 0, x = 1 and x = 2 in the equation of the function y = -3x
So, we have
y = -3(0) = 0
y = -3(1) = -3
y = -3(2) = -6
From the above computations, we can see that the y values are different for the inputs
Hence, the relation is a function because it is a one-to-one relation
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Landon is driving to a concert and needs to pay for parking. There is an automatic fee
of $5 just to enter the parking lot, and when he leaves the lot, he will have to pay an
additional $2 for every hour he had his car in the lot. How much total money would
Landon have to pay for parking if he left his car in the lot for 4 hours? How much
would Landon have to pay if he left his car in the lot for t hours?
Answers
If Landon left his automobile alone for 4 hours, he would be charged $13.
If Landon left his car for t hours, he would be charged 5 + 2t.
It is best to create a phrase for such inquiries.
The set cost of the parking fee is $5.
Additionally, it costs $2 each hour.
In other words, if someone uses the parking lot for t hours, they must pay $2 per hour for those t hours.
Formula = 2 x t = 2 t
Including the set amount, the entire phrase is:
5 + 2t
So, if Landon parked for six hours, he would have to pay:
= 5 + 2 t
= 5 + 2 x 4
= $13
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determine the two roots for perfect square 81 show your work
Answers
answer:
9
explanation:
9*9=81
81 sqrt= 9
Jane is a sales executive earning a salary of Ksh. 20,000 and a commission of 8% for the sales in exces of Ksh 100,000. If in January 2010 she earned a total of Ksh.48, 000 in salaries and commissions.
a) Determine the amount of sales she made that month
b) If the total sales in the month of February and march increased by 18% and then dropped by 25% respectively, calculate:
i) janes commission in February
ii) Her total earnings in march
Answers
Answer:
a
Step-by-step explanation:
Determine the amount of sales she made that month
a. The total amount of sales is Ksh 450,000
b. Her commission in february is Ksh 34,480
Total earning is Ksh 43,860
How to solve for the valuesa) Jane's total earnings in January were Ksh 48,000, and her base salary is Ksh 20,000. This means that she earned an additional Ksh 28,000 in commissions.
Since her commission rate is 8% for sales in excess of Ksh 100,000, we can calculate the amount of sales she made in January by first calculating the sales over which she got a commission.
Ksh 28,000 is 8% of the sales over Ksh 100,000. So we can set up the following equation and solve for the sales:
0.08 * sales = 28,000
Solving for sales:
sales = 28,000 / 0.08 = Ksh 350,000
Since she only earns a commission on sales in excess of Ksh 100,000, the total amount of sales she made in January would be:
Ksh 100,000 (no commission threshold) + Ksh 350,000 (sales over the threshold) = Ksh 450,000
b) i) If her total sales in February increased by 18%, her sales in February were:
1.18 * Ksh 450,000 = Ksh 531,000
But remember, she only gets a commission on sales over Ksh 100,000. So the sales that will earn a commission in February are:
Ksh 531,000 - Ksh 100,000 = Ksh 431,000
Her commission in February is 8% of this amount:
0.08 * Ksh 431,000 = Ksh 34,480
ii) If her sales in March then dropped by 25%, her sales in March were:
0.75 * Ksh 531,000 = Ksh 398,250
The sales that will earn a commission in March are:
Ksh 398,250 - Ksh 100,000 = Ksh 298,250
Her commission in March is 8% of this amount:
0.08 * Ksh 298,250 = Ksh 23,860
So, her total earnings in March (her base salary plus her commission) would be:
Ksh 20,000 + Ksh 23,860 = Ksh 43,860
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Find the sum of each finite arithmetic series. 10+20+30+ . . . . . +110+120
Answers
The sum of finite arithmetic series 10+20+30+ . . . . . +110+120 is 780
Suppose we are given an arithmetic series:
a(1) + a(2) + a(3) + ... + a(n)
The sum of the first nth terms is given by:
S(n) = n/2 [a(1) + a(n)]
Where:
a(1) is the first term and a(n) is the nth term.
The given series is:
10+20+30+ . . . . . +110+120
We get, then,
a(1) = 10
a(n) = 120
To find n, recall the formula of the nth term of an arithmetic sequence:
a(n) = a(1) + (n-1) . d
where d is the common difference.
From the given series, we get:
d = 20 - 10 = 10
Substitute a(1) =10, d = 10, and a(n) = 120 into the formula:
120 = 10 + (n-1) . 10
120 = 10 n
n = 12
Substitute n = 12 into the sum formula:
S(n) = n/2 [a(1) + a(n)]
S(12) = 12/2 (10 + 120)
= 6. 130 = 780
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PLEASE ANSWER QUICK THANK U SO MUCH
Find the range of the relation.
A. {-4, 4}
B. { -4, -2, 0, 2, 4 }
C. { -7, -4, -2, -1, 0, 2, 4, 5 }
D. { -7, -4, -1, 2, 5 }
Answers
I dont understand this
Answers
Select all the expressions that have 2/3 as a product.
A 21/25 × 50/63
B 7/8×9/25
C 1/30×2/3
D 3/25×7/12
E 20/27×27/30
Answers
Answer: A and E
Step-by-step explanation:
A. 21/25 × 50/63=
(21*50)/(25*63)=
21/63 * 50/25 =
1/3 * 2 =2/3
B. 7/8×9/25=
(7*9)/(8*25)=
63/200 [tex]\neq[/tex] 2/3
C. 1/30×2/3=
(1*2)/(30*3)=
2/90=
1/45 [tex]\neq[/tex] 2/3
D. 3/25×7/12=
(3*7)/(12*25)=
3/12 * 7/25 =
1/4 * 7/25 =
(1*7)/(4*25)=
7/100 [tex]\neq[/tex] 2/3
E. 20/27×27/30=
(20*27)/(27*30)=
27/27 * 20/30=
1 * 2/3 = 2/3
A and E
The constant of proportionality in an equation can never be 0. True or false?
Answers
Answer:
True
Step-by-step explanation:
When all quantum numbers are considered, how many different quantum states are there for a hydrogen atom with n=1 ? with n=2 ? with n=3 ? list the quantum numbers of each state.
Answers
Quantum numbers are:
(A) n = 1 ⇒ n -1(B) n = 2 ⇒ n = 2What do we mean by quantum numbers?Quantum numbers are used in quantum physics and chemistry to describe the values of conserved quantities in the dynamics of a quantum system. Quantum numbers are eigenvalues of operators that commute with the Hamiltonian and their corresponding eigenspaces—quantities that can be known with precision at the same time as the system's energy. A specification of all of the quantum numbers of a quantum system, when combined, fully characterizes the system's basis state and can, in theory, be measured together.Quantum numbers:
(A) n = 1
The electron in a hydrogen atom with n=1 is in its ground state; if the electron is in the n=2 orbital, it is in an excited state. For a given n value, the total number of orbitals is n2. Angular Momentum (Secondary, Azimunthal) l = 0,..., n-1 Quantum Number(B) n = 2
The n = 2 states begin to fill up as we move to larger atoms, adding electrons one at a time. Because there are four different values for (l, m), each with two allowed spin states, the n = 2 states can hold up to eight electrons. The n = 2 shell includes all states with a quantum number of n = 2.Therefore, Quantum numbers are:
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Jasmine ran for 98.4 minutes. Throughout her run, she ran at a pace of 8.2 minutes per mile.
Answers
Answer: 106.6 is the correct answer
Step-by-step explanation:
Thailand is home to numerous indigenous tribes. The Akha tribe population is about 7×104 people, and the Kariang tribe population is 6 times larger. About how many people are in the Kariang tribe?
Answers
The number of people that are in the Kariang tribe is; 420000 people
How to multiply indices?We are given;
Total Population of Akha Tribe in Thailand = 7 * 10⁴ people
Kariang tribe population is a total of 6 times larger than that of Akha Tribe
Thus, for us to be able to get how many people are in the Kariang tribe, we will just multiply both values to get;
6 * 7 * 10⁴ = 42 * 10⁴ = 420000
Therefore, since Thailand is home to numerous indigenous tribes, we can conclude from the calculation above and using the given parameters in the question that the number of people that are in the Kariang tribe is; 420000 people
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Draw two cards without replacement from a well-shuffled standard deck of 52 cards. find the probability distribution of the number of diamonds drawn. enter exact answers (fractions).
Answers
There are 13 diamonds in the deck (as well as other colors). Since there are 52 cards, the probability of getting a diamond on the first draw is 13/52. After the first card is drawn, all that's left are his 12 diamonds. Therefore, the probability of drawing a diamond is 12/51 (note that he has only 51 cards left after pulling/removing the first card since there are no replacement cards). The overall probability is the product of two possibilities. The odds of drawing diamonds from the original deck are 13/52 times the odds of drawing diamonds from his remaining 51 cards. Assuming the first card drawn is a diamond, 12/51.
P=13/52*12/51=1/4*4/17=1/17.
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Line g passes through the points (-2.6,1) and (-1.4,2.5), as shown. Find the equation of the line
that passes through (0, -b) and (c,0).
Answers
The equation of the line that passes through (0,-b) and (c,0) is 7y - 8x = 28
What is the equation of line?The relationship between each x and each matching y is expressed in the equation of a line to produce an ordered pair (x, y) that lies on the line. The equation won't be satisfied by ordered pairs (x, y) that don't lie on the line.
The equation of a line in point-slope form is calculated using the following formula:
y-y₀=m(x-x₀)
where, m is the slope of the line and (x₀, y₀) is any point on the line.
Given data: A line G passes through the points (-2.6,1) and (-1.4,2.5). Let the points (-2.6,1) be (x₀,y₀) and (-1.4,2.5) be (x,y).
Slope of the equation (m)= y-y₀/ (x-x₀)
Slope of the equation (m)=2.5-1/{-1.4-(-2.6)}
Slope of the equation (m)=1.5/(-1.4+2.6)
Slope of the equation (m)=1.5/1.2
Slope of the equation (m)=5/4
Slope of the equation (m)=1.25
The formula y= ax + b can be used to determine the equation of line.
y= 1.25x+b
To find the value of b, let's replace the point (-2.6,1) in the equation above.
1=1.25(-2.6)+b
1=-3.25 +b
b= 1+3.25
b=4.25
let y=0
0=1.25x+4.25
x=-3.4
Therefore, the equation's points are (0,-4.25) and (-3.4,0).
let y = kx+ b
0=k(-3.4)+(-4.25)
k=-1.25
In light of this, the equation for the line through points (0,-4.25) and (-3.4,0) is y=-1.25x-4.25
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Solve the equation.
-4/1=x/-2
Answers
Answer:
8
Step-by-step explanation:
a) Round 98984 to 1 significant figure.
Answers
Round 98984 to 1 significant figure.
Answer:100000.
An office has recycling barrels that are cylindrical with cardboard sides and plastic lids and bases. Each barrel is 3 feet tall with a diameter of 30 inches. How many square feet of cardboard are used to make each barrel?
Answers
Square feet of cardboard are used to make each barrel = 23.4558 sq. ft.
The recycling barrels are cylindrical.
Height of the cylinder, h = 3ft
Diameter of the base circle of the cylinder = 30 inches
So radius, r = 15 inches = 15 x 0.083 ft = 1.245 ft
The total surface area of the cylinder is the sum of its lateral surface area and the area of the base and lid circles.
Here the base and lid of the cylinder is made of plastic and sides made of cardboard. So to find the square feet of cardboard required, we need only to find the lateral surface area of the cylinder.
Lateral surface area of the cylinder = 2πrh
= 2 x 3.14 x 1.245 x 3
= 23.4558 square feet
So 23.4558 square feet of cardboard is used to make each barrel
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An astronomical unit is the mean distance from the center of Earth to the
center of the sun. One astronomical unit is about 9.3 × 10 miles. Pluto
is about 40 astronomical units from the sun. What is the approximate
distance that Pluto is from the sun?
A. 3.72 × 10 miles
B. 4.30 × 10 miles
C. 3.72 × 10 miles
D. 4.30 × 10 miles
Answers
The approximate distance that Pluto is from the sun will be 3.72 × 10⁹ miles. Then the correct option is A.
What is conversion?Conversion means to convert the same thing into different units.
PEMDAS rule means for the Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to solve the equation in a proper and correct manner.
The average distance between the centers of the Earth and the Sun is measured in astronomical units.
We know that One astronomical unit is about 9.3 × 10⁷ miles.
Pluto is about 40 astronomical units from the sun. Then the approximate distance that Pluto is from the sun will be
⇒ 40 × 9.3 × 10⁷
⇒ 372 × 10⁷
⇒ 3.72 × 10⁹ miles
The approximate distance that Pluto is from the sun will be 3.72 × 10⁹ miles. Then the correct option is A.
Your question was incomplete, but the complete question was given below.
An astronomical unit is the mean distance from the center of Earth to the center of the sun. One astronomical unit is about 9.3 × 10⁷ miles. Pluto is about 40 astronomical units from the sun. What is the approximate distance that Pluto is from the sun?
A. 3.72 × 10⁹ miles
B. 4.30 × 10⁹ miles
C. 3.72 × 10⁷ miles
D. 4.30 × 10⁷ miles
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What is the y -coordinate of the y -intercept of the line 4 x+3 y=12 ?
Answers
The y-coordinate is 4 and the y-intercept is (0,4)
The given equation is 4x + 3y = 12
Comparing the equation with the equation of line ax + by = c
where a = 4, b = 3, c = 12
The y-intercept is the point where the graph intersects the y-axis. To graph, any function that is of the form y = f(x) finding the intercepts is really important. There are two types of intercepts that a function can have. They are the x-intercept and the y-intercept. An intercept of a function is a point where the graph of the function cuts the axis.
for y-intercept,
x coordinate is 0
that is x=0
4(0) + 3y = 12
3y = 12
y = 12/3
y = 4
Hence the y-coordinate is 4 and the y-intercept is (0,4)
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What is the geometric mean of 8 and 22 in simplest form?
A. 4 √11
B. 15
C. 16√11
D. 176
Answers
The geometric mean of 8 and 22 in simplest form is 4√11. The answer is letter A.
Geometric mean, like arithmetic mean, is a kind of average and a measure of central tendency.
To solve for the geometric mean, we multiply the numbers together and then take a square root (for two numbers), cube root (for three numbers) etc. In other words, geometric mean is the nth root of the product of n values.
The formula for the geometric mean is given by:
GM = n√x1 x2 . . . xn
Solving for the geometric mean between 18 and 1.5 using the formula:
GM = n√x1 x2 . . . xn
where n = 2, x1 = 8, and x2 = 22
GM = √(8)(22)
GM = √176
GM = 4√11
Hence, the geometric mean of 8 and 22 is A. 4 √11.
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Add 3/4+(−2 1/2) using the number line.
Select the location on the number line to plot the sum.
Answers
The location on the number line to plot the sum will be between -1 1/2 and -2.
How to illustrate the information?It should be noted that the number line is a straight line that is a visual representation of the numbers. It can be used for addition and subtraction.
In this case, the addition of 3/4 + (-2 1/2) will be:
= 3/4 - 2 1/2
= - 1 3/4
Therefore, the location on the number line to plot the sum will be between -1 1/2 and -2.
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Need help finding the SECOND possible solution!!!
Answers
The two possible locations of the point C are (1, 1) and (- 2, - 5).
How to determine the two location of a point within a line based on a given ratio
According to the statement, we find the coordinates of the ends of a line segment and a partition ratio. There are two possible solutions concening the location of the point B:
AC / BC = 4 : 1BC / AC = 4 : 1Thus, we have the corresponding expressions for each case:
Case 1
C(x, y) = A(x, y) + (4 / 5) · [B(x, y) - A(x, y)]
C(x, y) = (- 3, - 7) + (4 / 5) · [(2, 3) - (- 3, - 7)]
C(x, y) = (- 3, - 7) + (4 / 5) · (5, 10)
C(x, y) = (- 3, - 7) + (4, 8)
C(x, y) = (1, 1)
Case 2
C(x, y) = A(x, y) + (1 / 5) · [B(x, y) - A(x, y)]
C(x, y) = (- 3, - 7) + (1 / 5) · [(2, 3) - (- 3, - 7)]
C(x, y) = (- 3, - 7) + (1 / 5) · (5, 10)
C(x, y) = (- 3, - 7) + (1, 2)
C(x, y) = (- 2, - 5)
The two possible locations of the point C are (1, 1) and (- 2, - 5).
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