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3 years ago

Ms. Riders asked 15 piano students how many hours of practice they put in each week. The list shows the data she recorded.

Mathematics

1 answer:

Gekata [30.6K]3 years ago

7 0

See the attached image below for the dot plot. The center is at 8 with dots on either side of 8 being a mirror copy of one another. For example, there are 2 dots over 6 and 2 dots over 10

<h3>Answer: B. The data is symmetrical</h3>

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Marcos purchased a sail boat for $56,900. He anticipates each year the boat will decrease in value by 8.1% from the previous yea

Varvara68 [4.7K]

Answer: $56,900\left( 0.919\right)^x$

Step-by-step explanation:

Given

Marcos purchased a sailboat for $\$56,900$

Each year the boat will decrease in value by $8.1\%$

After 1 year it is

$\Rightarrow 56,900-56,900\times 0.081\\\Rightarrow 56,900\left( 1-0.081\right)\\$

after another year it becomes

$\Rightarrow 56,900\left( 1-0.081\right)-56,900\left( 1-0.081\right)\times 0.081\\\Rightarrow 56,900\left( 1-0.081\right)\cdot \left( 1-0.081\right)\\\Rightarrow 56,900\left( 1-0.081\right)^2$

After $x$ years it is

$\Rightarrow 56,900\left( 1-0.081\right)^x$

$\Rightarrow 56,900\left( 0.919\right)^x$

5 0

2 years ago

What's 9 + 10 ? give me the right answer

Nataliya [291]

Answer:

Step-by-step explanation:

Add 9 to 10

7 0

2 years ago

Cate solved an inequality to find c, the possible number of cats that a shelter can house. She found that c < 28. Which state

stellarik [79]

Since the number of cats has to be less than 28, a statement could be "the shelter can house no more than 28 cats.

5 0

3 years ago

Read 2 more answers

39/7 as a mixed number

svp [43]

39/7
7 can fit into 39 as a whole 5 times
you then have 4 left over
5 4/7

5 0

2 years ago

Read 2 more answers

A small bag of trail mix contains 3 cups of dried fruit and 4 cups of almonds.A large bag contains 41/2 cups of dried fruit and

Juliette [100K]

Let's call:
f = price of 1 cup of dried fruit
a = price of 1 cup of almonds

In order to build the linear system, you need to consider that the total price of a bag is given by the sum of the price of cups times the number of cups in each bag, therefore:

$\left \{ {{3f + 4a = 6} \atop {41/2 f + 6a = 9 }} \right.$

Solve for a in first equation:
a = (6 - 3f) / 4

Then substitute in the second equation:
41/2 f + 6 · (6 - 3f) / <span>4 = 9
41/2 f + 9 - 9/2 f = 9
16 f = 0
f = 0

Now, substitute this value in the formula found for a:
</span>a = (6 - 3·0) / <span>4
= 3/2 = 1.5

Hence, the cups of dried fruit are free and 1 cup of almond costs 1.5$</span>

3 0

3 years ago