A student thinks that the regular pentagon in the diagram
has 10 lines of symmetry. Explain the student's error.
Answers
Answer:
A
Step-by-step explanation:
The student must have thought that every single arrowhead is a line of symmetry, so since there are 10 arrowheads, there must be 10 lines of symmetry. This is incorrect because if you look closely at the diagram, each line has 2 arrowheads, so the student is overcounting by a factor of 2. They should have just counted the number of lines, not arrowheads. Therefore, there must be 10/2 = 5 lines of symmetry, not 10. Hope this helps!
Related Questions
I have a question what is 70% of 80
Answers
Answer:
56
Step-by-step explanation:
80 x 0.7 = 56
The answer is 56. Your welcome
El triple de un numero n menos 4 es -19
Answers
Answer:
3n - 4 = -19, n = -5
Step-by-step explanation:
Primero tienes que sumar cuatro a ambos lados y obtener tres veces n es igual a menos quince. Luego, divide tres en ambos lados para obtener n es igual a -5
16
Jamar skis down Mount Spalding at a constant rate. After skiing for two minutes, Jamar is at an elevation of 2,100 feet. After skiing for 5 minutes, Jamar is at an
elevation of 150 feet. What is the rate of change, in feet per minute, of Jamar's elevation?
A-700
B
-650
С
650
D 700
Answers
Mrs. Jackson bought 4 gallons of juice for a party. Each gallon has 16 cups. After the party, 4 cups of juice were left over. At the party, how many cups did people drink? Show your work and complete the explanation of how you found your answer.
Answers
Answer:
60 cups
Step-by-step explanation:
Mrs. Jackson bought 4 gallons of juice for a party. Each gallon has 16 cups.
From the above question:
1 gallon of juice = 16 cups
Then:
4 gallons of juice = c
Cross Multiply
1 × c = 4 × 16 cups
c = 64 cups of juice
Hence, 4 gallons of juice = 64 cups of juice
We are told that :
After the party, 4 cups of juice were left over.
The cups of juice people drank at the party is calculated as:
Total cups of juice - Number of cups of juice left over.
64 cups of juice - 4 cups of juice
= 60 cups of juice
who wanna do my homework ill give u 100 points
Answers
Answer: I will help you! What you need help with mate? I am so bored so I am waiting for a challenging question!!! :)
I can help :) just depends on what it is you need help with but I will try to help :)
the the slope and Y-intercept of -4x-2y=-8
Answers
Answer:
slope -2
y int (0, 4)
Step-by-step explanation:
When you solve y = x/4 - 6 for x, which equation is the result?
Answers
Final Answer: [tex]x = 4(y + 6)[/tex]
Steps/Reasons/Explanation:
Question: When you solve [tex]y = \frac{x}{4} - 6[/tex] for x, which equation is the result?
Step 1: Add [tex]6[/tex] to both sides.
[tex]y + 6 = \frac{x}{4}[/tex]
Step 2: Multiply both sides by [tex]4[/tex].
[tex](y + 6)[/tex] × [tex]4 = x[/tex]
Step 3: Regroup terms.
[tex]4(y + 6) = x[/tex]
Step 4: Switch sides.
[tex]x = 4(y + 6)[/tex]
~I hope I helped you :)~
I need help with this.
Answers
Answer:
[tex]x + (3x - 9) = 5x - 30 \\ x + 3x - 9 = 5x - 30 \\ 4x - 9 = 5 x - 30 \\ - 9 + 30 = 5x - 4x \\ 21 = x \\ so..value \: of \: x \: is \: 21 \\ so. \\ <ACD = 5 \times 21 - 30 = 105 - 30 = 75° \\ < ACB = 180° - 75° = 115°[/tex]
<ACB = 105°
it is correct✅ ans.❤❤❤❤❤❤❤❤❤
plazzz mark is as a brilliant ansTHIS IS WRONG CAN SOMEONE CORRECT THIS PLEASE THANK YOU
A football team wants to buy a football. The football costs $52. There are 13 members of the team. How much will each of the team members contribute to be able to purchase the football if they had $28 already.
Solution: Let the amount each team member contributes be x, then
13x + 28 ≥ 52
13x ≥ 52 - 28
13x ≥ 22
x ≥ 22/13
x ≥ 2
Answers
Answer:
heyyyyyyyyyyyyyyy
Step-by-step explanation:
Answer:
sheeshhhhhhhhhhhhh
;)
Step-by-step explanation:
daddy chill
What’s the solution to the equation
Answers
ANSWER: D
30.16=17.56+5x
30.16-17.56=5x
12.6=5x
x=12.6/5
x=2.52
HOPE IT HELPS YOU OUT PLEASE MARK IT AS BRAINLIEST AND FOLLOW ME PROMISE YOU TO FOLLOW BACK ON BRAINLY.IN
MATHHHH!!!! PLZZZZ!!! HELP!!!
Answers
I need help on this question if you can I'll give you brainliest and 20 points
Answers
Calculate the sale price for each item.
8. A ring that is $75.50 and 30% off.____
9. A pair of shoes that are $40.99 and 25% off.________________________________
10. A tie that is $30.00 and is 40% off.__________________________________________
Answers
Answer:
8. $52.85 you'll save $22.65
9. $30.74 you'll save $10.25
10.$18.00 you'll save $12.00
Step-by-step explanation:
Answer:
8. $52.85 saved$19.65
9. $30.74 saved$10.25
10. $18.00 saved$12.00
What is the value of x?
Answers
Answer:
one is the value of x this is correct answer
helppppppppppppppppp
Answers
Answer:
b There is No Solution for this system
Step-by-step explanation:
When graphing out equations, the two equations have to intersect at one point to have a solution. If they are parallel, it means that they will never intersect at one point and thus there is no solution for the system. A pair of lines would only have infinitely many solutions when both lines are at the same position travelling in the same direction, overlapping each other.
please help 100 points
Answers
Graph:
X| Y
1 | .25
2| .50
3| .75
4| 1.00
5| 1.25
Answer:
thx
Step-by-step explanation:
What is the slope of the line represented by the equation y = -2/3 - 5x? O-5 O-2/3 O2/3 O5
Answers
The slope of the line represented by the equation y = -2/3 - 5x is -5
halp plz my mommy sayd that i neda awnsur this to pas my test!!!!!! i wil brainlist!!!! :))
John has 4 apples, he gives 2 to Karen. How many apples will John have if he give 2 more apples to Becky?
thx for haplin me!! :)
Answers
Question:
Each week, Tasha saves 80% of the money she earns babysitting and spends the rest. This week she earned $80.00.
How much more money did she save than spend this week?
Answer:
none. i better be right or else im jumping off my roof
In the parallelogram shown, AE = t + 2, CE = 3t − 14, and DE = 2t + 8.
Parallelogram A B C D is shown. Diagonals are drawn from point A to point C and from point D to point B and intersect at point E.
What is the length of line segment DB?
20 units
24 units
48 units
68 units
Answers
Answer:
48 units
Step-by-step explanation:
The length of line segment DB is 48 units
What are parallelograms?Parallelograms are shapes with opposite parallel sides
Start by calculating the measure of t using:
AE = CE --- the diagonals
So, we have
3t - 14 = t + 2
Collect like terms
3t - t = 14 + 2
Evaluate
t = 8
The length of segment DB is calculated as;
DB = 2 * DE
So, we have:
DB = 2 * (2t + 8)
Substitute 8 for t
DB = 2 * (2* 8 + 8)
Evaluate
DB = 48
Hence, the length of line segment DB is 48 units
Read more about parallelograms at:
https://brainly.com/question/2834871
A NIKE T-SHIRT WAS REDUCED FROM $60 TO $45. BY WHAT PERCENT WAS THE T-SHIRT REDUCED?
20%
30%
15%
25%
Answers
Answer:
25%
Step-by-step explanation:
the formula is:
1-(new price/old price), which =
1-(45/60)=
1-3/4=
4/4-3/4=
1/4=
.25 or 25%
Hope this helps! :)
What is the product of all constants $k$ such that the quadratic $x^2 + kx +15$ can be factored in the form $(x+a)(x+b)$, where $a$ and $b$ are integers?
Answers
Thats insane tho!
Whats ur aops class that you take?
Order the set of integers from greatest to least. {-100, -89, -124, -69, -52}
Answers
Answer:
-52, -69, -89, -100, -124
Step-by-step explanation:
When your dealing with negative numbers the smaller number the larger it is.
Hope this helps have a nice day:)
I don’t know how to do this
Answers
Answer:
the following points: (6,-1),(2,-4), and (-2,3)
Step-by-step explanation:
imagine that the y axis is a mirror. Everything that happens is reflected. So (1,2) becomes (-1,2) so your three points are (-6, -1),(-2,-4), and (2,3) when you reflect them, you get the following points: (6,-1),(2,-4), and (-2,3)
The mean number of robberies per month in a certain town is 3. What is the probability that in any given month 5 robberies will occur in this town?
0.01
0.14
0.265
0.916
Answers
Answer:
i think its c but not 100% tbh
Step-by-step explanation:
What triangle is this ??? PLEASEE helpppp !!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
isoscoles right
Step-by-step explanation:
Olivia uses the work below to determine 55% of 720.
Step 1: 55 percent = 50 percent + 10 percent minus one-half (10 percent)
Step 2: 50% of 720 = 720 divided by 2 = 360
10% of 720 = 720 divided by 10 = 72
One-half (10 percent of 720) = One-half (72) = 31
Step 3: 360 + 72 – 31 = 401
Which explains the error in Olivia’s solution?
Step 1: Olivia used percents that are not equivalent to 55%.
Step 2: Olivia incorrectly determined 50% of 720.
Step 2: Olivia incorrectly determined One-half of 10% of 720.
Step 3: Olivia subtracted One-half of 10% when she should have added.
Answers
Answer:
C. Step 2: Olivia incorrectly determined One-half of 10% of 720.
Step-by-step explanation:
On the unit test on edge, hope this helps UwU
Please help!!!! I don’t get it
Answers
Answer:
x = 9
m<b = 54
m<e = 54
Step-by-step explanation:
which one of these tables shows a direct variation
Answers
Answer:
The first one
Step-by-step explanation:
A direct variation is when x and y are multiplied or divided by the same number. For example, in the first one y is always 8 times x. But, in the 2nd 3rd and 4th one that is not the case.
Hope this Helps!!! :)
Let me know in the comments if I should change anything or if the answer was perfect!!!
I NEED HELPPP !!!!!!!
Answers
Answer:
84/B
Step-by-step explanation:
Angle measure 51 is vertical
45+51+A=180
A=84
Which trigonometric identity can be used to prove the given statement?
tan0 cos0 = sin0
Answers
Answer:
Step-by-step explanation:
Free trigonometric identity calculator - verify trigonometric identities step-by-step This website uses cookies to ensure you get the best experience. By using this website, you agree to our Cookie Policy.