3 years ago

What are the next three terms of the sequence 1, -3, 9, -27,…?

1 answer:

6 0

It is multiplying by negative 3 each time. So the next numbers will be positive, negative, positive. The numbers would be this... 81, -243, and then 729 in that order:) Hope I helped!

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Is a triangle with sides of length 6ft, 21 ft, 23 ft. A right triangle?

gayaneshka [121]

Answer:

Step-by-step explanation:

By using the Pythagoras theorem, it can be easily determined that whether the triangle is right triangle or not.

Thus, $a^{2}+b^{2}=c^{2}$ where where a and b are the legs and c is the hypotenuse.

Let a=6ft, b=21ft and c=23ft, then

$a^{2}+b^{2}=c^{2}$

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3 years ago

Two numbers have a difference of 12. The smaller of the two numbers is 3 less than double the other. What are the two numbers?

nexus9112 [7]

Answer:

-9,-21

Step-by-step explanation:

let the numbers be x and y and x>y

x-y=12

y=2x-3

x-(2x-3)=12

x-2x+3=12

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x=-9

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3 years ago