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Parker offers to pay for 5 of his friends to play laser tag, but 3 of them don’t want to play. Parker offers to pay for 5 of his

gtnhenbr [62]

Answer: B

Step-by-step explanation:

First, you have to find how many friends are playing. This can be found in the equation 5-3. Now you multiply by six to find the cost. If you chose C, that would be incorrect, because the () you would mltilply first (30) and then subtract 3 (27). You can also think of it as finding the cost of how much all of them want to play by using the distributive property, leaving you with 30 - 18, and subtract from there to get 12.

6 0

3 years ago

Use x = 3 to identify the value of each expression.<br><br> Exponent Value of expression

natta225 [31]

Dddd$$c &fguhvhjhhujgih’h

5 0

3 years ago

Divide 1/3 yd by 9/13 ? please show work

babunello [35]

Answer:

13/27

Step-by-step explanation:

1/3 ÷ 9/13

Copy dot flip

1/3 * 13/9

13/27

5 0

3 years ago

A bag contains five white balls and five black balls. Your goal is to draw two black balls.

umka21 [38]

Answer:

a.) the probability that both the ball drawn are black = $\frac{10}{45} = \frac{2}{9}$

b.) Sum of all the probabilities = $\frac{\frac{2}{9} }{1 - \frac{2}{9} } = \frac{\frac{2}{9} }{\frac{8}{9} } = \frac{2}{8} =\frac{1}{4} = 0.25$

Step-by-step explanation:

a) two balls are drawn at random .

total number of balls = 10

number of black balls = 5

number of white balls = 5.

the number of ways two balls can be drawn = $\binom{10}{2} = \frac{10!}{2! 8!} = \frac{10\times9}{2} = 45$

the number of ways two black balls can be drawn = $\binom{5}{2} = \frac{5!}{2! 3!} = \frac{5\times4}{2} = 10$

the probability that both the ball drawn are black = $\frac{10}{45} = \frac{2}{9}$

b) probability that First draw of two black balls = $\frac{2}{9}$

probability that first draw is of two white balls is and second draw is of

two black balls = $\frac{2}{9} \times\frac{2}{9}$

Probability that first two draws are of white balls and the third draw is of

two black balls = $\frac{2}{9} \times\frac{2}{9} \times\frac{2}{9}$

This is a geometric sequence and the final probability will be the sum of

all such probabilities, where we can take the the sequence to be an infinite series and the first term is $\frac{2}{9}$ and the common ratio is $\frac{2}{9}$ which is less than 1.

Sum of all the probabilities = $\frac{\frac{2}{9} }{1 - \frac{2}{9} } = \frac{\frac{2}{9} }{\frac{8}{9} } = \frac{2}{8} =\frac{1}{4} = 0.25$

3 0

3 years ago

It takes nate four hours to paint a wall and it takes jill seven hours to paint the same wall about how many hours will it take

loris [4]

If Nate paints the wall in 4 hours, it means that he can paint 1/4 of the wall every hour.

Similarly, if Jill paints the wall in 7 hours, it means that he can paint 1/7 of the wall in one hour.

So, together, they paint the following fraction of the wall in one hour:

$\frac{1}{4}+\frac{1}{7} = \frac{4+7}{28} = \frac{11}{28}$ .

At this rate, they need 28/11 hours to paint the whole wall, in fact, after that amount of time they paint

$\frac{11}{28}\frac{28}{11} = 1$

i.e. the whole wall

7 0

3 years ago