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BabaBlast [244]

3 years ago

14

Determine the length of xy

1 answer:

Art [367]3 years ago

8 0

What is the value of xz its not clear in image

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Make n the subject of the formula: M=3n

natta225 [31]

Divide each side by 3. ----- n=M/3 .

4 0

4 years ago

Please please help me with this question please now and show your steps

sattari [20]

Answer:

$y = {x}^{2} - 8x + 7 \\ a = 1 \: and \: b = - 8 \\ the \: line \: of \: symmetry \: \\ x = \frac{ - b}{2a} = \frac{8}{2} \\ x = 4(line \: of \: symmetry) \\ y = {4}^{2} - 8(4) + 7 \\ = 16 + 32 + 7 = y = 55 \\ vertix \: is \: (4 ,55) \\ y = {0}^{2} - 8(0) + 7 \\ y = 7 \\ 0 = {x}^{2} - 8x + 7 \\ (x - 7)(x - 1) = 0$

6 0

3 years ago

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.

5 0

4 years ago

Which expression is equivalent to −6(23−12)?

Softa [21]

Answer:

C

Step-by-step explanation:

5 0

3 years ago

Round to the nearest ones place for the problem as follows......3.9

WINSTONCH [101]

I believe it would be 4.

5 0

3 years ago

Read 2 more answers