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3 years ago

What would u say if ur math teacher asks u this?!

Mathematics

2 answers:

seraphim [82]3 years ago

8 0

Answer:

undecided

Step-by-step explanation:

My name is Ann [436]3 years ago

6 0

I would choose undecided

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Cho tam giác abc có bm,cn là đường trung tuyến . Nếu bm = cn chứng minh tam giác abc cân . Từ đó rút ra định lý trong một tam gi

chubhunter [2.5K]

6251=6635277262562748

4 0

3 years ago

Find the projection of the vector A = î - 2ġ + k on the vector B = 4 i - 4ſ + 7k. 15. Given the vectors A = 2 i +3 ſ +6k and B =

Gwar [14]

Answer:

Part 1)

Projection of vector A on vector B equals 19 units

Part 2)

Projection of vector B' on vector A' equals 35 units

Step-by-step explanation:

For 2 vectors A and B the projection of A on B is given by the vector dot product of vector A and B

Given

$\overrightarrow{v_{a}}=\widehat{i}-2\widehat{j}+\widehat{k}$

Similarly vector B is written as

$\overrightarrow{v_{b}}=4\widehat{i}-4\widehat{j}+7\widehat{k}$

Thus the vector dot product of the 2 vectors is obtained as

$\overrightarrow{v_{a}}\cdot \overrightarrow{v_{b}}=(\widehat{i}-2\widehat{j}+\widehat{k})\cdot (4\widehat{i}-4\widehat{j}+7\widehat{k})\\\\\overrightarrow{v_{a}}\cdot \overrightarrow{v_{b}}=1\cdot 4+2\cdot 4+1\cdot 7=19$

Part 2)

Given vector A' as

$\overrightarrow{v_{a'}}=2\widehat{i}+3\widehat{j}+6\widehat{k}$

Similarly vector B' is written as

$\overrightarrow{v_{b'}}=\widehat{i}+5\widehat{j}+3\widehat{k}$

Thus the vector dot product of the 2 vectors is obtained as

$\overrightarrow{v_{b'}}\cdot \overrightarrow{v_{a'}}=(\widehat{i}+5\widehat{j}+3\widehat{k})\cdot (2\widehat{i}+3\widehat{j}+6\widehat{k})\\\\\overrightarrow{v_{a'}}\cdot \overrightarrow{v_{b'}}=1\cdot 2+5\cdot 3+3\cdot 6=35$

7 0

4 years ago

Barry Allen's older brother is only 3 years more than triple Barry's age. If the sum of their ages is 28, find their ages

Sloan [31]

B and a
barry=b
a=older bro

a is 3 more than 3b
a=3+3b
sum is 28
a+b=28
3+3b+b=28
3+4b=28
minus 3 both sides
4b=25
divide both sides by 4
b=6.25

a=3+3b
a=3+3(6.25)
a=3+18.75
a=21.75

barry=6.25 years
21.75 years=older bro

3 0

3 years ago

Read 2 more answers

Select the polynomial that can be factored as (2x-5)^2

V125BC [204]

Answer:

d. 4x^2-20x-25

Step-by-step explanation:

So, we have to multiply (2x-5) by itself. That gives:

(2x-5) (2x-5) = 2x (2x-5) - 5 (2x-5) = 4x² - 10x -10x + 25

so, the correct answer is 4x² - 20x + 25

It's just important to multiply each component carefully by using the distributive property.

6 0

3 years ago

Please help me with my other problems too, it’s 3Am plz

mina [271]

Answer:

5:6

Step-by-step explanation:

5/11

6/11

5/6

5:6

8 0

3 years ago