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Mathematics

1 answer:

Rainbow [258]2 years ago

7 0

Answer:

what we have to do here

please tell us .

then i will help you

you can use this formula

then it might help you

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If P=(-2,5) and (x,-27), find all numbers x such that the vector represented by PQ has length -40

Akimi4 [234]

Answer:

x ∈ {-26, 22}

Step-by-step explanation:

A graph shows that the points (-26, -27) and (22, -27) lie on a circle of radius 40 centered at (-2, 5). That is, if Q is either one of these points, the vector PQ will have a length of 40:

√((-26-(-2))^2 +(-27-5)^2) = √((-24)^2 +(-32)^2) = √1600 = 40
√((22 -(-2))^2 +(-27 -5)^2) = √(24^2 +(-32)^2) = √1600 = 40

You can call it -40 if you like, but you have to define what negative length means when you do that.

8 0

2 years ago

The sum of 86, 68, and 38 is 192. What else do you know about the sum of 68, 38, and 86?

Sveta_85 [38]

<span>We have 2 given numbers:
=> 86 + 68 + 38 = 192
=> 68 + 38 + 86 = 192 also
This kind of process used commutative property system of equation in where:
a + b = b + a
No matter what sequence you are going to use, the answer would always be the same.
In the given 2 equations, notice that both digits of 2 group of equation contains the same number. The only difference is they were added with different orders. Yet the answers are still the same.

</span>

8 0

3 years ago

Stardust the unicorn, covered a distance of 50 miles on his first trip to the forest. On a later trip he travelled 300 miles whi

jok3333 [9.3K]

His new time compared with the old time was increased by factor of 2

<h3>Further explanation</h3>

Acceleration is rate of change of velocity.

$\large {\boxed {a = \frac{v - u}{t} } }$