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vichka [17]
3 years ago
8

What is the conditional statement for “all right angles measure 90°

Mathematics
1 answer:
patriot [66]3 years ago
4 0

Answer:

4

Step-by-step explanation:


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Let r3 have the euclidean inner product. let u = (-1, 1, 1) and v = (-7, 6, 15). if ||ku + v||= 7, what is k? give the exact ans
amm1812
Mak\mathbf u+\mathbf v=k(-1,1,1)+(-7,6,15)=(-k-7,k+6,k+15)

Recall that for a vector \mathbf x\in\mathbb R^n, we have \|\mathbf x\|=\sqrt{\mathbf x\cdot\mathbf x}. So we have

\|k\mathbf u+\mathbf v\|=\sqrt{(k\mathbf u+\mathbf v)(k\mathbf u+\mathbf v)}=7
\implies k^2\mathbf u\cdot\mathbf u+2k\mathbf u\cdot\mathbf v+\mathbf v\cdot\mathbf v=49
\implies3k^2+56k+261=0
\implies k=-9,-\dfrac{29}3
3 0
3 years ago
Which of these fractions is equivalent 1/8?<br> A.3/24<br> B.2/9<br> C.1/16<br> D.9/17<br> E.11/18
Brrunno [24]

Answer:A:3/24

Step-by-step explanation:

It’s basic math

4 0
3 years ago
Any of 3-6 preferably all if you can
Contact [7]

3: $6.35

4. $2.73

5: $3.38

6. Sport city because its racket costs $7 less than the other one

7 0
3 years ago
What is x^4+25 factored
OLga [1]

(x^2+5)(x^2-5)

I hope this helps :)

3 0
3 years ago
Read 2 more answers
The scale of a model train is 1 inch to 13.5 ft. One of the cars of the model train is 5inches long. What is the length in feet
aleksklad [387]

Answer:

The length of the actual train's car is <u>67.5 feet.</u>

Step-by-step explanation:

Given:

The scale of a model train is 1 inch to 13.5 ft.

Now, to get the length of the actual car of the train.

Let the length of actual train's car be x.

And, the length of the car of model train = 5\ inches\ long.

<em>According to the scale of the model train, 1 inch is equivalent to 13.5 ft. </em>

<em>Thus, 5 inches is equivalent to </em>x.<em />

Now, to get the length of actual train's car using cross multiplication method:

\frac{1}{13.5} =\frac{5}{x}

By cross multiplying we get:

x=67.5\ feet.

Therefore, the length of the actual train's car is 67.5 feet.

7 0
3 years ago
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