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2 years ago

Is 21xy and 21yx the same?

Mathematics

2 answers:

miv72 [106K]2 years ago

7 0

Answer:

Yes

Step-by-step explanation:

Algebraic terms that multiply each other can be written in any order. This is the commutative law.

An example of how this works is 5×3 is the same as 3×5.

**This content involves the commutative law, which you may wish to revise. I'm always happy to help!

harina [27]2 years ago

3 0

Answer:

yes

Step-by-step explanation:

yes

x x y = xy

y x x = yx

so its the same thing just depends whether u want to be it in alphabetical order

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Let L be the line parametrized by x = 2 + 2t, y = 3t, z = −1 − t. (a) Find a linear equation for the plane that is perpendicular

Elden [556K]

Answer:

Step-by-step explanation:

Given that L is a line parametrized by

$x = 2 + 2t, y = 3t, z = −1 − t$

The plane perpendicular to the line will have normal as this line and hence direction ratios of normal would be coefficient of t in x,y,z

i.e. (2,3,-1)

So equation of the plane would be of the form

$2x+3y-z =K$

Use the fact that the plane passes through (2,0,-1) and hence this point will satisfy this equation.

$2(2)+3(0)-(-1) =K\\K =5$

So equation is

$2x+3y-z =5$

b) Substitute general point of L in the plane to find the intersecting point

$2(2+2t)+3t-(-1-t) =5\\4+8t+1=5\\8t=0\\t=0\\(x,y,z) = (2,0,-1)$

i.e. same point given.

3 0

3 years ago

Can someone help me with is one

ch4aika [34]

Answer:

C is your answer

Step-by-step explanation:

7 0

3 years ago

Please help me? please and thanks

AVprozaik [17]

Answer:

- $\frac{35}{2}$

Step-by-step explanation:

-5 ÷ $\frac{2}{7}$ = 17 $\frac{1}{2}$

17 $\frac{1}{2}$ = - $\frac{35}{2}$

8 0

3 years ago

Read 2 more answers

A line that intersects two or more lines is called a parallel line true or false

Irina18 [472]

Answer:

False

Step-by-step explanation:

Parallel lines never touch

6 0

3 years ago

6. Michael Johnson holds the Olympic record for the men's 400m race at 43 seconds. His

vlada-n [284]

The difference between both unit rates rounded off to the nearest tenth is: 0.4 meters per second

Step-by-step explanation:

We have to calculate his unit rate for both type of races

So,

Unit rate for 400m race:

Distance = 400m

Time = 43 sec

$Unit\ rate = U_1= \frac{Distance}{Time}\\=\frac{400}{43}\\=9.30\ meters\ per\ second$

Unit rate for 300m Race:

Distance = 300m

Time = 31 sec

$Unit\ Rate= U_2=\frac{300}{31}\\=9.68\ meters\ per\ second$

The difference between both unit rates is:

$U_2-U_1 = 9.68-9.30\\=0.38 => 0.4\ meters\ per\ sec$

Hence,

The difference between both unit rates rounded off to the nearest tenth is: 0.4 meters per second

Keywords: Unit rate, Speed

Learn more about unit rate at:

#LearnwithBrainly

7 0

3 years ago