Find the value of the polynomial 3xy+7x2−3x2y+3y2x−2x2−2xy+4x2y−2y2x, when x=1 and y=−2
Answers
9514 1404 393
Answer:
5
Step-by-step explanation:
The evaluation can be easier if terms are collected first.
3xy+7x^2−3x^2y+3y^2x−2x^2−2xy+4x^2y−2y^2x
= x^2y(-3+4) +xy^2(3-2) +x^2(7-2) +xy(3-2)
= x^2y +xy^2 +5x^2 +xy
= x(xy +y^2 +5x +y)
Filling in the numbers, we have ...
= (1)(1(-2) +(-2)^2 +5(1) +(-2))
= -2 +4 +5 -2
= 5
The value of the polynomial is 5.
Related Questions
The equation can be used to find the measure of angle LKJ. Triangle L K J is shown. Angle J L K is a right angle. The length of L K is 7.7 centimeters and the length of L J is 8.9 centimeters. Angle L K J is x. What is the measure of angle LKJ? Round to the nearest whole degree. 41° 45° 49° 55°
Answers
Answer:
C, 49°.
Step-by-step explanation:
Cause i said so
Answer:
C, 49.
Step-by-step explanation:
A population y of coyotes in a national park triples every 20 years. The function y = 15(3)^x
represents the population, where x is the number of 20 year periods.
a. Find and interpret the y-intercept.
b. How many coyotes are in the national park in 40 years?
Answers
Answer:
a. y int. = initial amount of coyotes
b. 135 coyotes
Step-by-step explanation:
a. when x = 0, you get y int. = 15 coyotes. This shows that at the very beginning, you had 15 coyotes.
b. 40 years = two 20 year periods. x = 2 after 40 years
y = 15 * (3)^2
y = 135 coyotes
a. y int. = initial amount of coyotes
b. 135 coyotes
The calculation is as follows:a. when x = 0, you get y int. = 15 coyotes.
This represent that at the very beginning, you had 15 coyotes.
b. 40 years = two 20 year periods. x = 2 after 40 years
[tex]y = 15 \times (3)^2[/tex]
y = 135 coyotes
learn more: https://brainly.com/question/10283285?referrer=searchResults
PLEASE HELP PLEASE
A group of 20 people from the retirement community is visiting the fair today. Each person is between 75 and 79 years old and will participate in either the Pie Eating Contest or the Chili Cookoff. If all 20 people joined the same event, how would the shape of the histogram change compared to the original?
Histogram with title Pie Eating Contest, horizontal axis labeled Age Group (year) with bins 0 to 19, 20 to 39, 40 to 59, and 60 to 79 and vertical axis labeled Number of People with values from 0 to 60 at intervals of 10. The first bin goes to 20, the second goes to 40, the third goes to 60, and the last goes to 50. Histogram with title Chili Cookoff, horizontal axis labeled Age Group (year) with bins 0 to 19, 20 to 39, 40 to 59, and 60 to 79 and vertical axis labeled Number of People with values from 0 to 60 at intervals of 10. The first bin goes to 30, the second goes to 50, the third goes to 40, and the last goes to 10.
The Chili Cookoff would be more skewed.
The Pie Eating Contest would be more skewed.
The Chili Cookoff would be less symmetrical.
The Pie Eating Contest would be more symmetrical.
Answers
Answer:
The Pie Eating Contest would be more skewed.
Step-by-step explanation:
In order to answer this, first we need to draw original histograms for both of these two events. Since all of the 20 people from the retirement community is attending one of the events, but we don't know which one, we need to draw new histograms for each of the events (see the attachment).
The only distinction of new histograms is the change in the fourth bin representing the 60-79 age group, since all visitors from retirement community fall into this age group.
A histogram is symmetrical if, when split in half by a vertical line, its left and right half act approximately as an object and its reflection in the mirror.
A histogram is skewed if, when split in half by a vertical line, one of its halves shows much greater values then the other.
So looking at our histograms, if all 20 people went to a Pie Eating Contest, that histogram would become more skewed and if all 20 people went to a Chili Cookoff, that histogram would become more symmetrical, which makes b) the correct answer.
Based on the information given, the correct option is B. The Pie Eating Contest would be more skewed.
From the information given, it was stated that a group of 20 people from the retirement community is visiting the fair today and that each person is between 75 and 79 years old and will participate in either the Pie Eating Contest or the Chili Cookoff.In a situation where all the 20 people joined the same event, the shape of the histogram will change compared to the original as the pie-eating contest would be more skewed.This implies that when split in half by a vertical line, one of its halves will have greater values than the other.
Learn more about histograms on:
https://brainly.com/question/2962546
I need help please and thank you
Answers
Answer:
58 degrees
Step-by-step explanation:
All triangles measure up to 180 degrees.
180-87-35=58
6. Persevere Mr. Alton wants to be
tickets for a show. The tickets are for
seats in 3 rows with 3 seats in each
row. The total cost of the tickets
is $81. Each ticket costs the same.
What is the cost of one ticket?
Answers
Answer:
Each ticket it 9$
Step-by-step explanation:
3 by 3 is 3 times 3
3 times 3 is 9
$81/9 is 9
Find the measure of x in each figure
Answers
Answer:
The answer is in both because, the x goes into 3 accordingly. Also in 30 degrees you move upward, and they both factor into the same equations.
Answer:
Step-by-step explanation:
Select the three equations that pass through the points (-4, -16) and (5,2).
y + 4 = 2(x - 16)
y-2 = 2(x - 5)
y=2x-8
y + 16 = 2(x + 4)
DONE
Answers
Answer:
It's B,C,D
Step-by-step explanation:
Answer:
its b,c, and d
Step-by-step explanation:
Natalia Leon bought a new bicycle for $248. The sales tax rate is 6 percent. What is the total purchase price
a. $368.22
C. $262.88
b. $234.66
d. $12.40
Answers
Answer:
c. $262.88
Step-by-step explanation:
248× 0.06= $14.88
248+14.88= 262.88
In a survey of 3300 people who owned a certain type of car, 825 said they would buy that type of car again. What percent of the people surveyed were satisfied with the car?
Answers
Answer: 25%
Step-by-step explanation:
Since 825 people said they would buy the car again, it means they were satisfied with the car
Therefore, the percentage of those satisfied with the car is = (825/3300) x 100 = 25%
Students played dodgeball and volleyball for 45 min.They played dodgeball for 11 more minuets than volleyball.How long did they play Dodgeball
Answers
Answer:
28 minutes
Step-by-step explanation:
d + v = 45
d = v + 11
time to sub
(v + 11) + v = 45
2v + 11 = 45
2v = 45 - 11
2v = 34
v = 34/2
v = 17 minutes.........volleyball
d = v + 11
d = 17 + 11
d = 28 minutes <=== dodge ball
Answer:
28 mins.
Step-by-step explanation:
How do you isolate the variable in 3x=9
Answers
Answer:
x = 3
Step-by-step explanation:
you would divide both sides by three to get the x alone giving you
x = 9/3
What is a equal to?
12=2a
Answers
Using the balance method, we find a = 15 by isolating the variable a. Substituting a = 15 back into the original equation, we verify the solution.
To solve the equation 12 = 2a - 18 using the balance method, we aim to isolate the variable a on one side of the equation.
Starting with 12 = 2a - 18, we'll first add 18 to both sides to isolate the term with 2a:
[tex]\[12 + 18 = 2a - 18 + 18\]\[30 = 2a\]\\[/tex]
Next, we divide both sides by 2 to solve for a:
[tex]\[\frac{30}{2} = \frac{2a}{2}\]\[15 = a\][/tex]
Now, let's verify the solution by substituting a = 15 back into the original equation:
[tex]\[12 = 2(15) - 18\]\[12 = 30 - 18\]\[12 = 12\][/tex]
Since the left side equals the right side, the solution a = 15 is verified.
Complete Question:
Solve the following equation using balance method and verify 12 = 2a - 18
Speed, Time, and Dis
1 a. Noah rides his bike with a constant
speed of 18 km/h. How long will he
take to travel a distance of
54 kilometers?
Answers
Answer:
3 hours
Step-by-step explanation:
Recall:
Distance = speed x time
we are given that speed = 18 km/h and distance = 54 km.
hence,
54 = 18 x time (divide both sides by 18 and rearrange)
time = 54/18 = 3 hours
Noah will take 3 hours to travel a distance of 54 kilometers at a constant speed of 18 km/h.
To determine how long Noah will take to travel a distance of 54 kilometers at a constant speed of 18 km/h, we can use the formula for time, which is:
Time = Distance / Speed
Let's calculate Noah's travel time:
Time = 54 km / 18 km/h = 3 hours
Noah will take 3 hours to cover the 54-kilometer distance on his bike.
Please help!!!!!!!!!!!!
Answers
Answer:
The fraction is: [tex]$ \frac{\textbf{21}}{\textbf{110}} $[/tex]
Step-by-step explanation:
Given that the income is 66000 $ and the amount spent on taxes is 12600 $.
Therefore, the ratio of the amount of taxes and the income
[tex]$ = \frac{12600}{66000} $[/tex]
[tex]$ = \frac{126}{660} $[/tex]
Simplifying, we get: [tex]$ \frac{\textbf{21}}{\textbf{110}} $[/tex]
Hence, the answer.
What is the solution to x2 = 225?
O
A. X = 15 or x =
-15
O B. X = -15
OC. I = 15
D. r = 5 or x = -:
Dan
Answers
Answer:
x = ± 15
Step-by-step explanation:
Given
x² = 225 ( take the square root of both sides )
x = ± [tex]\sqrt{225}[/tex] = ± 15
That is x = - 15 0r x = 15
Answer:
Step-by-step explanation:
X² = 225
Finding the square root of both side
√X² = √225
X = 15 or -15
Which function has a range of y < 3?
y=3(2)*
y=2(3)
y=-(2)*+ 3
O y=(2]*_3
Answers
Answer:
The function given by [tex]y = - (2)^{x} + 3[/tex] will have a range of y < 3.
Step-by-step explanation:
The function given by [tex]y = - (2)^{x} + 3[/tex] will have a range of y < 3.
This is because, for any real values of x, the term [tex]- (2)^{x}[/tex] will have a negative value. If we put x = 1, then, [tex]- (2)^{x}[/tex] = - 2, and for x = -1, then [tex]- (2)^{x}[/tex] = - 0.5.
That means [tex]- (2)^{x} < 0[/tex] for all real x.
Hence, [tex]- (2)^{x} + 3[/tex] < 0 + 3
⇒ y < 3 for all real x. (Answer)
joshua has only dimes and pennies in his piggy bank. he has a total of $23.00 in his bank. the amount of pennies is 20 more than 10 times the amount of dimes. how many dimes and pennies are there
Answers
There are 1160 pennies and 114 dimes in the piggy bank.
Step-by-step explanation:
Given,
Worth of money = $23.00 = 23*100 = 2300 cents
1 penny = 1 cent
1 dime = 10 cents
Let,
x be the number of pennies
y be the number of cents
According to given statement;
x+10y=2300 Eqn 1
x = 10y+20 Eqn 2
Putting value of x from Eqn 2 in Eqn 1
[tex]10y+20+10y=2300\\20y=2300-20\\20y=2280[/tex]
Dividing both sides by 20
[tex]\frac{20y}{20}=\frac{2280}{20}\\y=114[/tex]
Putting y=144 in Eqn 2
[tex]x=10(114)+20\\x=1140+20\\x=1160[/tex]
There are 1160 pennies and 114 dimes in the piggy bank.
Keywords: linear equation, substitution method
Learn more about linear equations at:
brainly.com/question/9621364brainly.com/question/9539036#LearnwithBrainly
Final answer:
Joshua has 114 dimes and 1160 pennies in his piggy bank. This was determined by setting up a system of equations based on the values of the coins and the given relationship between the number of dimes and pennies.
Explanation:
The problem presented is a typical algebraic word problem that requires setting up equations based on the given information about dimes and pennies. We are told that the total value of the coins is $23.00 and that the number of pennies is 20 more than 10 times the number of dimes. To solve the problem, we need to use the fact that the value of a dime is 10 pennies, and then set up a system of linear equations to find the number of each type of coin.
Step-by-Step Explanation
Let's denote the number of dimes as d and the number of pennies as p.The value of the dimes is 10d pennies since each dime is worth 10 pennies.The total value of the dimes and pennies is 23 dollars or 2300 pennies (since 1 dollar equals 100 pennies).According to the problem, p = 10d + 20.The equation representing the total value is thus 10d + p = 2300.Substituting p from the first equation into the second gives us: 10d + (10d + 20) = 2300.Simplifying this equation, we get 20d + 20 = 2300.Subtracting 20 from both sides, we get 20d = 2280.Dividing both sides by 20, we find out that d = 114.Substituting d back into the first equation to find p, p = 10(114) + 20 which gives us p = 1160.Thus, Joshua has 114 dimes and 1160 pennies in his piggy bank.
4 decimals whose sum is 2.35
Answers
Answer:
One way you can solve this problem would be to take 2.35/4
2.35/4= .5875
Then you can add .5875 + .5875 +.5875 +.5875
Which equals 2.24
.5875 + .5875 +.5875 +.5875
Hope this helps ;)
To find four decimals whose sum is 2.35, you can set up a system of equations and solve for the values. The four decimals are 0.10, 0.20, 0.15, and 0.15.
Explanation:The question is asking for four decimals whose sum is 2.35. To find these decimals, we can assign variables to each decimal (let's call them a, b, c, and d) and set up an equation: a + b + c + d = 2.35. Since we want the decimals to have only two places after the decimal point, we can express them in hundredths. For example, instead of 0.1, we can write it as 10/100 = 0.10.
Now, we can set up a system of equations:
a + b + c + d = 2.35
a = 10/100
b = 20/100
c = 15/100
d = 15/100
By substituting the values back into the first equation, we have: (10/100) + (20/100) + (15/100) + (15/100) = 2.35. Simplifying the equation, we have 0.10 + 0.20 + 0.15 + 0.15 = 0.60. Therefore, the four decimals whose sum is 2.35 are 0.10, 0.20, 0.15, and 0.15.
Learn more about Decimals here:https://brainly.com/question/33864774
#SPJ3
A technology company produces two types of calculators.
• They must produce at least 10 and not more than 30 graphing calculators per day.
• Each day, the number of graphing calculators cannot exceed twice the number of scientific calculators produced.
• The number of scientific calculators cannot exceed 40 per day.
If x is the number of graphing calculators produced daily and y is the number of scientific calculators produced daily, what are the constraints ?
Answers
10 ≤ x ≤ 30, x < 2y, x < 40.
Solution:
Given x is the number of graphing calculators produced daily and
y is the number of scientific calculators produced daily.
Step 1: A company produce atleast 10 and not more than 30 graphing calculators per day.
⇒ 10 ≤ x < 30
Step 2: Each day, the number of graphing calculators cannot exceed twice the number of scientific calculators produced.
⇒ x < 2y
Step 3: The number of scientific calculators cannot exceed 40 per day.
⇒ x < 40
Hence, the constraints are 10 ≤ x ≤ 30, x < 2y, x < 40.
What is 4 9/8 as a simplified fraction
Answers
Answer:
5 1/8
Step-by-step explanation:
4 9/8 is an improper fraction since the numerator is greater than the denominator. To simplify it, you can find how many total eighths there are. 4*8 = 32, and 32 + 9 = 41. Therefore, there are 41/8. There are 5 eights in 41, with one as a remainder, so 4 9/8 simplifies to 5 1/8.
The value of the mixed number A = 4 9/8 is A = 5 1/8
What are Mixed Numbers?A mixed number is a whole number, and a proper fraction represented together. A mixed number is formed by combining three parts: a whole number, a numerator, and a denominator. The numerator and denominator are part of the proper fraction that makes the mixed number.
Given data ,
Let the mixed number be represented as A
Now , the value of A is
A = 4 9/8 be equation (1)
On simplifying the equation , we get
A = 4 9/8
A = ( 32 + 9 ) / 8
A = 41 / 8
Now , the value of A is an improper fraction , and to convert in into a mixed number , we get
The value of A = 5 1/8
Therefore , the value of A is 5 1/8
Hence , the mixed number is 5 1/8
To learn more about mixed numbers click :
https://brainly.com/question/2639375
#SPJ5
You are trying to order 1/4 pound of saffron, but the ordering system wants a decimal.What should you type in?
Answers
Answer:
Step-by-step explanation:
1/4 = (1 divided by 4) = 0.25
To convert 1/4 pound of saffron to a decimal for an ordering system, divide 1 by 4, resulting in 0.25. Therefore, the appropriate decimal to enter is 0.25.
The question involves converting a fraction to a decimal for the purpose of entering an order quantity in a system. In this case, we want to convert 1/4 pound of saffron into a decimal. To do this, simply divide the numerator (1) by the denominator (4). Therefore, 1 divided by 4 equals 0.25. Hence, you should type 0.25 into the ordering system to order 1/4 pound of saffron.
What is -5x-10=10 answer
Answers
Answer:
-4
Step-by-step explanation:
-5x-10=10
+10 +10
-5x=20
÷-5 ÷-5
×=-4
Determine the diameter of a curcle with the radius 12.2
Answers
Answer:
24.4
Step-by-step explanation:
diameter=2*radius
=2*12.2
=24.4
Final answer:
The diameter of a circle with a radius of 12.2 is 24.4 units. This is calculated by doubling the radius, using the formula D = 2r.
Explanation:
To determine the diameter of a circle with a radius of 12.2, you simply need to use the relationship between the radius and the diameter of a circle. The diameter is twice the radius, which can be represented by the formula D = 2r, where D is the diameter and r is the radius.
Substituting the value of the radius into the formula gives us:
D = 2 × 12.2
This calculates to:
D = 24.4
Therefore, the diameter of the circle is 24.4 units. Keep in mind that if the radius was given in a specific unit, like meters or centimeters, then the diameter will be in the same unit.
(- 7 10 ÷ - 2 5 ) × (6 − 1.25) =
Answers
Answer: 134.9
Step-by-step explanation: Simplify the expression.
Hope this helps you out!
Does anyone know this?
Answers
Answer:
Just a guess but 101
Step-by-step explanation:
90-79=11. 90+11=101
A circle is shown that the radius is 16ft
Sarah wants to place a rim around her circular pool with a foam rim. The foam rim is
sold in boxes that will cover the length of 40 feet. How many boxes of foam rim will
Sarah need to place around the rim of the pool?
4 boxes
(A) 3 boxes
(B) 4 boxes
(C) 5 boxes
(D) 6 boxes
Answers
Answer:
3 boxes.
Step-by-step explanation:
The circular pool has a radius of 16 feet.
So, the circumference of the pool will be 2πr = [tex]2 \times \frac{22}{7} \times 16 = 100..57[/tex] feet.
Therefore, to place a rim around the circular pool with a foam rim Sarah will need 100.57 feet length of foam rim.
Now, the foam rim is sold in boxes that will cover the length of 40 feet.
Therefore, she will need [tex]\frac{100.57}{40} = 2.51[/tex] ≈ 3 boxes to place around the rim of the pool. (Answer)
The height of a tree in feet, y, is modeled by the equation y = 2.5x + 3, where x represents
the age of the tree in years. How old will the tree be when it is 33 feet tall?
Answers
Answer:
85.5 feet tall
Step-by-step explanation:
2.5(33)+3
82.5+3
85.5
Triangle X Y Z is cut by line segment C D. Line segment C D goes from side X Y to side Y Z. The length of C D is 15, the length of X Z is 18, the length of C Y is 25, and the length of Y D is 20. Lines C D and X Z are parallel. If and CX = 5 units, what is DZ? 2 units 3 units 4 units 5 units
Answers
The length of DZ is 4 units ⇒ 3rd answer
Step-by-step explanation:
Triangle X Y Z is cut by line segment C D, where
C lies on side XY and D lies on the side YZThe length of C D is 15The length of X Z is 18The length of C Y is 25The length of Y D is 20C D and X Z are parallelCX = 5 unitsWe need to find the length of DZ
In Δ XYZ
∵ C ∈ XY and D ∈ YZ
∵ CD // XZ
∴ m∠YCD = m∠YXZ ⇒ alternate angles
∴ m∠YDC = m∠YZX ⇒ alternate angles
In Δs YCD and YXZ
∵ m∠YCD = m∠YXZ
∵ m∠YDC = m∠YZX
∵ ∠Y is a common angle
∴ Δ YCD is similar to Δ YXZ by AAA postulate
- There is a constant ratio between their corresponding sides
∴ [tex]\frac{YC}{YX}=\frac{CD}{XZ}=\frac{YD}{YZ}[/tex]
∵ YC = 25 units
∵ CX = 5 units
∵ YX = YC + CX
∴ YX = 25 + 5 = 30 units
∵ YD = 20 units
∵ YZ = YD + DZ
∴ YZ = 20 + DZ
Let us use the ratio of the corresponding side
∵ [tex]\frac{YC}{YX}=\frac{YD}{YZ}[/tex]
∴ [tex]\frac{25}{30}=\frac{20}{20+DZ}[/tex]
- Simplify [tex]\frac{25}{30}[/tex] by dividing up and down by 5
∵ [tex]\frac{25}{30}=\frac{5}{6}[/tex]
∴ [tex]\frac{5}{6}=\frac{20}{20+DZ}[/tex]
- By using cross multiplication
∴ 5(20 + DZ) = 6(20)
∴ 100 + 5 DZ = 120
- Subtract 100 from both sides
∴ 5 DZ = 20
- Divide both sides by 5
∴ DZ = 4 units
The length of DZ is 4 units
Learn more:
You can learn more about triangles in brainly.com/question/3202836
#LearnwithBrainly
Answer:
on edge the answer is C.
Step-by-step explanation:
bc it is
what is 100-100-100-100-100-100-100-100-100-100-100-100
Answers
Answer:
-1000
Step-by-step explanation:
(100-100)-(100+100+100+100+100+100+100+100+100+100)=
= 0 - (100+100+100+100+100+100+100+100+100+100)
= -(100 + 100+100+100 + 100+100+100 + 100+100+100)
= -(100×10)
= - 1000
Answer:
-1000
Step-by-step explanation:
What is the answer for 4/8-2/5
Answers
Answer:
4/8 - 2/5 = 1/10