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3 years ago

Zapisz odpowiedzi w postaciach wyrażeń alegebraicznych:

Mathematics

1 answer:

Leto [7]3 years ago

6 0

Cześć!

d) 0 nie pasowało

e) malowane było 1.8

Mam nadzieję że to pomoże!

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What are the possible values of x if (4x - 5)^2= 49? Check all that apply.<br> →

allsm [11]

Answer:-1/2 and 3

Step-by-step explanation:

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3 years ago

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Gnom [1K]

Answer:

is C 4,816

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3 years ago

Which of the following is an extraneous solution of StartRoot 4 x + 41 EndRoot = x + 5? x = –8 x = –2 x = 2 x = 8

Finger [1]

Answer:

-8

Step-by-step explanation:

when you solve for x you get -8 but when you pkug it back in both sides are not equal, making it extranious

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Show that if u+v and u-v are orthognal, then the vectors u and v must have the same length.

pashok25 [27]

Answer with Step-by-step explanation:

We are given that

u+ v and u-v are orthogonal

We have to prove that u and v must have the same length.

When two vector a and b are orthogonal then

$a\cdot b=0$

By using the property

$(u+v)\cdot (u-v)=0$

We know that

$(a+b)\cdot (a-b)=\mid a\mid^2-\mid b\mid^2$

$\mid u\mid ^2-\mid v\mid^2=0$

$\mid u\mid^2=\mid v\mid^2$

Magnitude is always positive

When power of base on both sides are equal then base will be equal

Therefore,

$\mid u\mid=\mid v\mid$

Hence, the length of vectors u and v must have the same length.

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4 years ago

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sashaice [31]

Answer:

2.5

type A/B

Step-by-step explanation:

10/2.5=4

15/6=2.5

18/7.2=2.5

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3 years ago