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dulcemontano17
dulcemontano17 dulcemontano17
  • 08-02-2017
  • Mathematics
Answered

What is the value of x?

A)3

B)6

C)7

D)11

What is the value of x? A)3 B)6 C)7 D)11 class=

Verified Answer :

marisa08231
marisa08231 marisa08231
  • 08-02-2017

whats the equation and i can help

Answer Link
ReesePantz
ReesePantz ReesePantz
  • 08-02-2017

A= hb÷2
21=(x(x+1))÷2
Just try all the choices out to get a total of 21.
=(3(3+1))÷2
=(34)÷2
=12÷2 =6≠21

=(6(6+1))÷2
=(6*7)÷2
=42÷2 =21
The answer is B. 6

Answer Link

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