PLEASE HELP!!!
Give an example showing why one of the methods is not correct.
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Answer:
Brandon's methot is not correct
for example: x=9 9×1/2=4.5
Here's why:
Let's use his method to find the square root of 36. That means we multiply 36 by 1/2 = 0.5 to get 36*0.5 = 18; however, 18 is not the square root of 36. We can see that 18*18 = 324. Instead, the square root of 36 is 6 because 6*6 = 36.
As another example, let's say we want to find the square root of 64. With Brandon's method, we would get to 64*0.5 = 32, but 32*32 = 1024. Ashley's method is correct and 8*8 = 64 shows that 8 is the square root of 64.
As a visual approach, think of a square with side lengths 8 feet each. The area would be 8*8 = 64 square feet. If you didn't know the side length, but you knew that the area was 64 square feet, then you could apply the square root operation to find the side length to be 8 feet (or you could effectively use Ashley's guess-and-check method to arrive at 8 feet). In short, the square root operation is the opposite of squaring a number. We consider these inverse operations.
Multiplying by 1/2 is the same as dividing by 2. Division is the opposite of multiplication, and division is not the inverse of squaring a number. It's just a coincidence that Brandon's method happened to work on the value 4. But as shown earlier, it doesn't work in general.
Related Questions
When rounding to the nearest hundred thousand, the weight of a blue whale was rounded to 500,000 pounds. What is the least the blue whale could actually weigh?
Answers
Answer:
450,000 pounds
Step-by-step explanation:
to round off to the nearest hundred thousand, look at thousand figure - If the number is greater or equal to 5, add 1 to the tenth figure. If this is not the case, add zero
to be rounded off to 500,000, it means that the thousand figure has to be between 50,000 - 99,000
the least figure would thus be 450,000
Is the function linear? How do you know?
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Which best explains why an iceberg floats? Water expands and becomes denser when it freezes. Water contracts and becomes denser when it freezes. Water expands and becomes less dense when it freezes. Water contracts and becomes less dense when it freezes.
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Answer: Water expands and becomes less dense when it freezes.
Step-by-step explanation:
When a solid is less dense than liquid that it is put in, it will float.
This is the case with icebergs. When water freezes, the molecules move away thereby expanding and increasing the volume of the water.
The larger the volume of an object, the smaller it's density.
The iceberg will therefore have a lower density that enables it to float.
Answer:
C: Water expands and becomes less dense when it freezes.
Step-by-step explanation:
I got it right on edge
find the Probability of pulling a green marble from a bag with six green and eight blue marbles.
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Answer:
6/14 or in its simplest form 3/7
what is the answer of 137 times 26 in multiplication
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Answer:
137 x 26 is 3562
Step-by-step explanation:
Answer: 3562
Step-by-step explanation:
answer for 30 points and brainilest
answer choices : 24.81 , $26.48 , 3.83 , 0.62 , $7.61 , $7.60 , $60.48 , $60.47 , 3.85 , 24.79 , $7.75 , 0.61 , $26.47 , 0.66 , 8.33 , $0.95
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Answer:
8.33, 0.66, 24.79, 3.85, 0.61, 7.75, 60.47, 0.95, 26.48, 7.60
Step-by-step explanation:
Can anybody tell the answer to this please!?
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Answer:
the height when it was planted
Step-by-step explanation:
it started at 13 and grew 2.5 inches a week
can someone help me
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Answer:
7 ft 4 in
Step-by-step explanation:
There are 12 inches in 1 foot. So,
88/12 = 7 1/3 or 7 feet and 4 inches.
find the corret measure of 6
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Answer:
∠3 = 102°
Step-by-step explanation:
║A straight line always equals 180°. So all we need to do is subtract 78° ║from 180° for the missing angle.
180 − 78 = 102
∠3 = 102°
Further explanation:
║The image shows two slanted lines across one vertical line. If we visualize ║a circle around the point where the slanted line intercepts with the vertical ║line, we can solve this.
[we only need one line to work with, because both lines are parallel]
║That circle you visualized divides the intercept into four sectors. One of ║those sectors, or angles, is labled 78°. We need to find the angle measure ║underneath the labled sector. The sector in the bottom right corner has ║the same angle measure as the labled sector, which is 78°. The sector ║labled ∠3 has the same angle measure as the sector in the upper right.
[a full rotation around an angle is always 360°]
║This can be easily solved by subtracting 78° from 180° to get the angle ║measure for the upper right sector, which is equivalent to ∠3. Using basic ║subtraction, 180° − 78° = 102°. We can prove this by multiplying 78° by 2, ║multiplying 102° by two, and adding the products.
78 ⋅ 2 = 156
102 ⋅ 2 = 204
204 + 156 = 360
║Because the sums equal 360°, we can determine the answer is true.
12. What property of multiplication is illustrated in 9 x 7=7 x 9?
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Answer:
Commutative property
Step-by-step explanation:
9x7 is the same as 7x9 because you get the same answer but the questions are just switched.
which polygon matches this set of ordered pairs
Answers
Answer:
A
Step-by-step explanation:
To solve this problem, we can just locate all the points listed in the problem.
The ordered pairs match the rectangle which is answer choice A.
Answer:
A
Step-by-step explanation:
The reason is that J,K,L,M are the points and the numbers of each points inside the parenthesis are the values of x-axis and y-axis.The first one is x and the second one is y. For example:(x,y) — (1,5)
Calculate the value of Molly's name if an acute angle is worth 5 points, a right angle is worth 7 points, and an obtuse angle is worth 7 points.
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The total value based on the information about the angles for Molly is 19 points.
How to illustrate the angles?From the information given, it was stated that acute angle is worth 5 points, a right angle is worth 7 points, and an obtuse angle is worth 7 points.
Therefore, the total value of the points will be:
= 5 + 7 + 7
= 19
In conclusion, the number of points will be 19.
Learn more about acute angles on:
https://brainly.com/question/6979153
The coordinate plane shown below shows the locations of the library and park in the town where Rasheed lives.
Which expression represents the distance from the library to the park as modeled on the coordinate grid?
A. 5 + 3
B. 5 + -3
C. 5 - -3
D. -5 - -3
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Find the distance, c, between (1, 2) and (4, –1) on the coordinate plane. Round to the nearest tenth if necessary.
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Answer: 3[tex]\sqrt{2}[/tex] = 4.24 = 4.2
Step-by-step explanation:
d = [tex]\sqrt{(x_2-x_1)^{2} +(y_2-y_1)^{2}[/tex]
= fill in the distance formula
=3[tex]\sqrt{2}[/tex]
15 ( 10 + y) = 3
i need help so bad
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y = -49/5
Please help asap I need this
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Answer:
y= x+4
y=–4–2x
Step-by-step explanation:
using the formula (x–x1)/(x1–x2)= (y–y1)/(y1–y2)
You rent an apartment that costs $1200 per month during the first year, but the rent
is set to go up 12% per year. Write a recursive formula to show what the rent is during
the nth year of living in the apartment.
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Answer:
So first we have to figure out what $1200 per month for 12 months is since it was a year. 1200x12=14,400 a year which is outrageous for an apartment just saying.
Then we find out what 12% of the 1200 is and then add it to 1200.
To find the percentage of that we need to know how many times 12 fits into 100% 12 fits into 100 a total of 8.33333333333 times.
So now we divide 1200 by 8.33333333333 to see what 12% of it is.
1200 divided by 8.33333333333 is 144. So 1200+144=1344.
Now since one of the nine years has passed already we only have 8 remaining.
Now we see what 1344 a month for 12 months is 16,128 a year.
Now we multiply 16,128 by 8 to get the outcome of 8 more years. So 16,128x8=129,024
Thats it pls mark brainliest
Step-by-step explanation:
I need help please.........
Answers
Answer:
What do you need help with?
Step-by-step explanation:
Solve for i
3 (.5i - 6 ) = 12
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Answer:
2
Step-by-step explanation:
15i-18=12
15i= 12+18
15i= 30
I= 30/15= 2
What is the lateral surface area?
7 A cylindrical pipe measures 18 inches and has a diameter of 1 inch. How many square inches of metal
are used to make the pipe, which is open on both ends? Round your answer to the nearest hundredth.
1 2 3
4
5 6
7
8
9
10
Next
M
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What is 50% of 40
Thank you
Answers
Answer:
20
50% of 40 is 20 because half of 40 is 20
Answer:
20
Step-by-step explanation:
1) Change 50% into a decimal
50% ⇒ 0.5
2) Multiply 0.5 by 40
0.5 × 40 = 20
Therefore, 50% of 40 is 20.
I hope this helps!
Find the surface area of
the prism.
14 in.
7 in.
5 in.
The surface area is _in2
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PLEASEEEEE HELPPPPPPP!!!!!
Answers
Answer:
(-4.5, 1.5)
Step-by-step explanation:
What are two partial products you would add to find 21 x 509?
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Hey, I really need help on this! This work is really hard and I just need a little help to get this right. Thank you!
Answers
Ans:wer:
is D:45
Step-by-step explanation:
Answer:
D: 45
Step-by-step explanation:
Volume = length x width x height
5 x 3 x 3 = 45
In a survey asking what is your favorite dessert, 15% of the students said their favorite dessert is candy. This means that 12 students said that candy was their favorite dessert. How many students were surveyed? (Hint you are trying to find the whole).
Answers
Answer:
80 students
Step-by-step explanation:
Ratios:
[tex]\frac{12}{x} =\frac{15}{100} \\\\15x=1200\\x=80[/tex]
Double check:
80(0.15) = 12
1. Oblicz:
a) Liczbę o 15% mniejszą od 60
b) Liczbę, której 15% stanowi 60
c) Jakim procentem 60 jest 15
d) O ile %większa jest 60 od 15
2. Kasia kupiła buty na wyprzedaży przecenione o 20%. Ich cena początkowa to 180 zł. W domu sprzedała je siostrze zarabiając na tym 10% wartości. Ile zapłaciła Kasi siostra za buty?
3. Liczba, którą powiększymy o 20% daje nam 30. Jaka to była liczba?
4. Za dwie książki zapłacono 42 zł. Ile kosztuje droższa z nich, jeżeli jedna jest o 25 % tańsza od drugiej?
Answers
Step-by-step explanation:
1. Oblicz:
a) Liczbę o 15% mniejszą od 60
b) Liczbę, której 15% stanowi 60
c) Jakim procentem 60 jest 15
d) O ile %większa jest 60 od 15
2. Kasia kupiła buty na wyprzedaży przecenione o 20%. Ich cena początkowa to 180 zł. W domu sprzedała je siostrze zarabiając na tym 10% wartości. Ile zapłaciła Kasi siostra za buty?
3. Liczba, którą powiększymy o 20% daje nam 30. Jaka to była liczba?
4. Za dwie książki zapłacono 42 zł. Ile kosztuje droższa z nich, jeżeli jedna jest o 25 % tańsza od drugiej?
PLSS HELP ME I WILL MARK AS BRAINLY THIS IS ABOT "Probability (Single event)"
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Answer:
1/4
Step-by-step explanation:
Answer: It's c for sure
Step-by-step explanation: i just know it is
How do I find the circumference?
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r = radius
A salesman who is on the road visiting clients thinks that, on average, he drives the same distance each day of the week. He keeps track of his mileage for several weeks and discovers that he averages 122 miles on Mon- days, 203 miles on Tuesdays, 176 miles on Wednesdays, 181 miles on Thursdays, and 108 miles on Fridays. He wonders if this evidence contradicts his belief in a uni- form distribution of miles across the days of the week. Explain why it is not appropriate to test his hypothesis using the chi-square goodness-of-fit test.
Answers
Answer:
The conditions are not met.
Step-by-step explanation:
The conditions for the chi square test for goodness of fit are
1) the sample is a random sample
2) the variable under study is categorical
3) all expected value of the number of sample observations are greater or equal to 5.
A)The observations must be independent
B) for 2 categories the expected values must be at least 5
C) for the 3 categories the expected values must be at least 1 and no more than 20% may be smaller than 5
The observations given may not be independent i.e have equal chances of occurrences or are maybe dependent on each other in the sense that there maybe a limit for his traveling mileage or the a limit for petrol ( fuel ) usage . So if he is required to drive 500 miles in a week each day mileage depends on the other day mileage .
Also we are given the information that keeps track of his mileage for several weeks, but we are not sure if several refers to more than 5 .
As both conditions are not clearly satisfied it is not appropriate to test his hypothesis using the chi-square goodness-of-fit test.
The sample must also be a random sample.
Here he has taken the mean of all the days.