1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Maru [420]
2 years ago
15

B(7,8) and B’(-8,-7) represent a 90 degree clockwise rotation. true or false?

Mathematics
1 answer:
Juli2301 [7.4K]2 years ago
7 0

90 degree clockwise rotation is described by the matrix,

\begin{bmatrix}0&1\\-1&0\\ \end{bmatrix}

If you apply the matrix to the vector B you get,

\begin{bmatrix}0&1\\-1&0\\ \end{bmatrix}\begin{bmatrix}7\\8\\ \end{bmatrix}=\begin{bmatrix}7\cdot0+8\cdot1=8\\ -1\cdot7+8\cdot0=-7\\ \end{bmatrix}

So false.

Hope this helps.

You might be interested in
2. A complete set of a grade school uniform requires 1 3/4 meters of white cloth
Andrei [34K]

Answer:

61.25 M

Step-by-step explanation:

the question is trying to mislead you with the blue amount, you are only looking for the amount of white needed.

this means you multiply 1.75 (1 3/4) times 35 sets, getting you 61.25 M

7 0
2 years ago
Read 2 more answers
Can somebody help pls it's due in 1 hour​
marta [7]
All are correct because negative numbers are always smaller than 0 and bigger negative numbers always are less then smaller negative numbers such as -9 is smaller than -5
4 0
3 years ago
PLEASE HELP ME. There is 2 questions
andrey2020 [161]

Answer:

If i did the math correctly the answer to number 9 is a.5 and number 10 is c. Vanilla and German chocolate cupcakes represent about 21% of total sales

Step-by-step explanation:

for number 9 you write down each of the numbers with a dot above them. how many dots represents how many times you repeat the number. you then add it together and divide by the amount of numbers you added together. so in this case it would be 65 ÷ 12. this ends up being 5.41 but you'd round down to 5.

for number 10 you write out how many each flavor sold. then you put those numbers over the total cupcakes sold. divide the denominator by 100 and then divide the numerator by that number. then that gives you the fractions of the percent each one was. the german chocolate and the vanilla added together is almost exactly 21% of the sales

6 0
3 years ago
6/8=y/16 how do you find the proportion of value y
Katarina [22]
You can set both fractions to have the same denominator by multiplying 6/8 (both the 6 and 8) by 2 to keep the value of the fraction, while turning the denominator to 16. So you get 12/16=y/16.
That means for the equation to be true y has to be 12.

Hope this helps!
4 0
3 years ago
Standard notation 8.15×10^5​
sukhopar [10]

Answer:

8.15×10^5

Step-by-step explanation:

8.15×10^5

8.15×100000

815000

8 0
2 years ago
Other questions:
  • A local animal feed company makes its feed buy a ton which is 2000 pounds. They want to include a medication in the field. Each
    8·1 answer
  • Simplify each expression by combining like terms.
    6·1 answer
  • What kind of transformation is illustrated in this figure?
    11·1 answer
  • Which side of angle measures could be the interior angles of a triangle?
    14·1 answer
  • Let p be the population proportion for the following condition. Find the point estimates for p and q. In a survey of 1226 adults
    9·1 answer
  • Draw a number line to represent the any quality
    8·1 answer
  • Which expression is equivalent to 3/8 + 4/8
    14·1 answer
  • Which statement is true?
    12·2 answers
  • The table and the graph each show a different relationship between the same two variables, x and y:
    10·1 answer
  • Please help! Please explain and actually help!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!