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3 years ago

HELPPP FIRST ANSWER THAT IS ACCURATE WITH EXPLANATION GETS BRAINLIST 5 STARS AND THANKS ( DONT PLAGIARIZE )

Mathematics

2 answers:

Marta_Voda [28]3 years ago

8 0

Answer:

20 x 19 = 380 hands touched

380/2 = 190 handshakes

Step-by-step explanation:

Svetach [21]3 years ago

8 0

Answer: 190 handshakes

Step-by-step explanation:

The first will shake 19 hands, the second 18 hands and so on......the 19 th will shake one hand

so 19+18+17+.....+1=19*20/2=19*10=190 handshakes

It is ok now?

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What is inside the square root? Is it just the root of x? Or is it ROOT(x-4) + 5 = 2?

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3 years ago

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2 years ago

Point M is the midpoint of segment AB. AM=3x+40 and MB=x^2. Find x and AB

Nina [5.8K]

$\text{Hello there! :)}$

$x = 8\\\\AB = 128 \text{ units}$

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$\text{Since Point M is the midpoint of AB, then:}\\\\AM = MB\\\\$

$\text{Set the two equations equal to each other:}\\\\3x + 40 = x^{2} \\\\$

$\text{Move all terms over to one side to simplify more easily:}\\\\0 = x^{2} - 3x - 40$

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$\text{Substitute in this value of x into either AM or MB to solve for AB:}$

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