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3 years ago

14

Give B is the midpoint of AC, what is AC?

1 answer:

Savatey [412]3 years ago

8 0

Answer:

$\fbox{27}$

Step-by-step explanation:

$4x+3=3x+9\\4x+3-3=3x+9-3\\4x=3x+6\\4x-3x=3x-3x+6\\x=6$

Plug in the 6 to the equations. Since B is the midpoint of AC, then both should be equal once plugged in [and solved].

$4(6)+3\\= 27\\3(6)+9\\= 27\\\\\fbox{27}$

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3 years ago

How many ways can a dance instructor send 4 of her 11 students to a summer dance program?

Sedaia [141]

Answer:

d) 330

Step-by-step explanation:

The number of ways can a dance instructor send 4 of her 11 students to summer dance program is C(11 , 4)

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by using formula $n_{C_{r} } = \frac{n!}{(n-r)!r!}$

now simplification

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after cancelling 7! and on simplification

= $\frac{11X10X9X8}{4X3X2X1}$

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3 years ago