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3 years ago

I'm a little confused

Mathematics

2 answers:

IRINA_888 [86]3 years ago

8 0

First
71-6=65
Because shirt and pant have the same price we take the sum of them and divided 65 by the sum of shirt and pant
9+4=13
65/13=5
Each shirt or pant price 5$

Olegator [25]3 years ago

4 0

she bought 9 shirts and 4 pants.

9 + 4 = 13 total articles of clothing.

Let's create an equation to model the problem.

x = price of one shirt or one pants

13x + $6 = $71

Subtract $6 from both sides.

13x = $65

Divide both sides by 13

x = $5

Each shirt or pair of pants costs $5.

The correct answer is D.

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A certain club has 10 members, including Harry. One of the 10 members is to be chosen at random to be the president, one of the

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The probability that Harry will be chosen as either as Secretary or as treasurer but not as president out of those 10 members will be $\frac{1}{5}$ .

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We have 10 members out of which one is Harry, we need to choose one of the 10 members as President, one to be as secretary out of the remaining 9, one as the treasurer of the remaining 8 members.

We want harry to be as either as secretary or as treasurer. so we will consider both the cases

Probability is given by = No of favorable outcomes/ Total no of outcomes

(1) Harry as secretary : If harry is to be chosen as secretary then he can't be a president or he cant be a Treasurer

As president = $\frac{1}{10}$

Not as president = $1 - \frac{1}{10}$ = $\frac{9}{10}$

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Not as treasurer = 1

Probability for chosen as secretary = $\frac{9}{10}*\frac{1}{9}*1$ = $\frac{1}{10}$

(2) Harry as treasurer : If harry is to be chosen as the treasurer so he can't be chosen as a President or as a Secretary.

Probability for not chosen as president = $\frac{9}{10}$

Probability for not chosen as secretary = $1-\frac{1}{9} = \frac{8}{9}$

Probability to be chosen as treasurer = $\frac{1}{8}$

Probability to be chosen as Treasurer = $\frac{9}{10}*\frac{8}{9}*\frac{1}{8}$ = $\frac{1}{10}$

Total probability for Harry to be chosen as either secretary or as treasurer will be = P(Secretary) +P(Treasurer)

= $\frac{1}{10} +\frac{1}{10} = \frac{1}{5}$

Therefore the probability that Harry will be chosen as either as Secretary or as treasurer but not as president out of those 10 members will be $\frac{1}{5}$ .

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3 years ago

2. Richmond Appliance repairs washing machines. The revenue that the company earns is given by the function R(h) = 20 + 45h doll

Vesnalui [34]

The number of hours needed for the company to break even happens when
$R(h)=C(h)$

$20+45h= 5h^{2}-30$ , rearranging to make the equation 'zero' on LHS
$0= 5h^{2}-30-20-45h$
$0= 5h^{2}-45h-50$ , divide each term by 5
$0= h^{2}-9h-10$ , factorise
$0=(h+1)(h-10)$ , equate each factor to zero
$h=-1$ and $h=10$

We choose the positive value of $h$

Hence, the number of hours needed to break even is $h=10$

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3 years ago

I'm a little confused ​

I'm a little confused