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Feliz [49]
3 years ago
11

A small class has 9 students, 3 of whom are girls and 6 of whom are boys. The teacher is going to choose two of the students at

random. What is the probability that the teacher will choose two girls ?Write your answer as a fraction in simplest form.
Mathematics
1 answer:
Free_Kalibri [48]3 years ago
4 0

Answer:

Probability that the first student chosen will be a boy is 6/9 (0.66%)

Probability that the second student chosen will be a girl is 3/8 (0.37%)

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huong and kathyrn each day impeoved their yards by planting rose bushes and ornamental grass. they bought their supplies from th
marta [7]

Answer:

One rose bush = $3

One bunch of ornamental grass = $4

Step-by-step explanation:

We can set up a system of equations to solve for this. Let cost of 1 rose bush be r and cost of 1 ornamental grass be g. Thus we can form 2 equations:

14r+7g=70\\5r+14g=71

We can multiply the first equation by -2 so that we can eliminate g. Thus, we have:

(*-2)14r+7g=70\\5r+14g=71\\-------\\-28r-14g=-140\\5r+14g=71\\--------\\-23r=-69\\r=\frac{-69}{-23}=3

Thus, 1 rose bush is $3. Now plugging in r = 3 into the first original equation, we can solve for g:

14r+7g=70\\14(3)+7g=70\\42+7g=70\\7g=70-42\\7g=28\\g=\frac{28}{7}=4

Thus, 1 bunch of ornamental grass is $4.

5 0
3 years ago
Bobby is helping buy meats for grilling for the school picnic he bought 10 pounds of a dollar and 1.69per pound 100 pounds of ha
lions [1.4K]
The hot dogs...1000x 2.09 is $2090
5 0
3 years ago
71% of Americans wear glasses.
Alex_Xolod [135]

Answer:

29%

Step-by-step explanation:

100%-71%=29%

3 0
3 years ago
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Which equations show direct variation between x and y? Choose all answers that are correct. a 3x=7 b y=4.2/x c y/x=6 d y=0.5x +
anastassius [24]

a).  No.  Variation in 'y' has no effect on 'x'.

b).  No.  Variation in 'x' has exactly the opposite effect on 'y'.

c).  Yes.  Variation in 'x' causes 'y' to vary 6 times as much in the same direction.

d).  No.  Doubling 'x' does not double 'y'.


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3 years ago
An online store sells flower arrangements for birthdays and other special events. In a review of their production costs, the
denis23 [38]

Answer: A confidence interval for the mean cost (in dollars) for one shipment of vases = (49,59)

Step-by-step explanation:

Confidence interval for mean: Mean ± Margin of error

Given: The  online store found the mean wholesale cost of one shipment of vases was ĉ = 54 dollars, with a margin of error of 5  dollars.

A confidence interval for the mean cost (in dollars) for one shipment of vases

=(54-5, 54+5)\\\\=(49,59)

Hence,  a confidence interval for the mean cost (in dollars) for one shipment of vases = (49,59)

8 0
3 years ago
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