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
Katen [24]
3 years ago
15

HELP ASAP PLEASE! GIVING AWAY 30 POINTS AND BRAINLIEST!

Mathematics
2 answers:
Papessa [141]3 years ago
7 0

Answer:

DB!

Step-by-step explanation:

Question a: 3+3+2+2 = 10 dinners

Question b: 15-30 and 30-45, because most people choose that range.

Hope I helped!

mezya [45]3 years ago
7 0

Answer:

a) 10 b) 2-3 dollars

Step-by-step explanation:

a) 3+3+2+2

b) (2+2+3+3)/2 equal 2.5 mean, range between them is 2 to 3

You might be interested in
Write 7*7*b*b*b in exponential form
ycow [4]

Answer:

  7²b³

Step-by-step explanation:

An exponent signifies repeated multiplication. Here, the factor 7 is repeated twice, and the factor b is repeated 3 times. These will get exponents of 2 and 3, respectively:

  7²b³

6 0
3 years ago
Find the value of x then classify the triangle
Sliva [168]

Answer: 88º

Step-by-step explanation:

180-47=133-45=88

4 0
3 years ago
All vectors are in Rn. Check the true statements below:
Oduvanchick [21]

Answer:

A), B) and D) are true

Step-by-step explanation:

A) We can prove it as follows:

Proy_{cv}y=\frac{(y\cdot cv)}{||cv||^2}cv=\frac{c(y\cdot v)}{c^2||v||^2}cv=\frac{(y\cdot v)}{||v||^2}v=Proy_{v}y

B) When you compute the product Ax, the i-th component is the matrix of the i-th column of A with x, denote this by Ai x. Then, we have that ||Ax||=\sqrt{(A_1 x)^2+\cdots (A_n x)^2}. Now, the colums of A are orthonormal so we have that (Ai x)^2=x_i^2. Then ||Ax||=\sqrt{(x_1)^2+\cdots (x_n)^2}=||x||.

C) Consider S=\{(0,2),(2,0)\}\subseteq \mathbb{R}^2. This set is orthogonal because (0,2)\cdot(2,0)=0(2)+2(0)=0, but S is not orthonormal because the norm of (0,2) is 2≠1.

D) Let A be an orthogonal matrix in \mathbb{R}^n. Then the columns of A form an orthonormal set. We have that A^{-1}=A^t. To see this, note than the component b_{ij} of the product A^t A is the dot product of the i-th row of A^t and the jth row of A. But the i-th row of A^t is equal to the i-th column of A. If i≠j, this product is equal to 0 (orthogonality) and if i=j this product is equal to 1 (the columns are unit vectors), then A^t A=I    

E) Consider S={e_1,0}. S is orthogonal but is not linearly independent, because 0∈S.

In fact, every orthogonal set in R^n without zero vectors is linearly independent. Take a orthogonal set \{u_1,u_2\cdots u_p\} and suppose that there are coefficients a_i such that a_1u_1+a_2u_2\cdots a_nu_n=0. For any i, take the dot product with u_i in both sides of the equation. All product are zero except u_i·u_i=||u_i||. Then a_i||u_i||=0 then a_i=0.  

5 0
3 years ago
The hourly cost of renting office space in Manhattan is shown by the graph below. The hourly cost of renting office space in Bro
Liula [17]

Answer:

Brooklyn is more expensive

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Translate this word phrase into an equation:
Tanzania [10]
.....................::
6 0
3 years ago
Other questions:
  • Yan has already finished 3/5 of the 45 math problems he was assigned today. Each math problem took him 1 4/5 of a minute to comp
    5·1 answer
  • Solve 12 3/8 divided by 5 1/2 <br><br><br> Please explain :)
    10·2 answers
  • 1180:21 pleas help​
    13·1 answer
  • Hey guys!!!1! I just joined this class and I’m super-duper excited!!!! Comment your favorite color!!!!!
    8·2 answers
  • Find the surface area of the prism.
    10·2 answers
  • Antonia recorded the number of cups of hot chocolate that were sold at soccer games compared to the outside temperature. The gra
    14·2 answers
  • 4x + 3z for x=7 and z=2​
    11·2 answers
  • PLSSSSS HELP I BEG YOU I WILL GIVE BRAINLIEST WHOEVER ANSWERS FIRAT AND CORRECT.!!!
    8·2 answers
  • 2 3/4÷2/5 will mark brainleyst
    6·2 answers
  • The perimeter of a rectangle is 60 cm. Its width measures
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!