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3 years ago

Simplify this ratio 10 feet/30 inches

Mathematics

1 answer:

Deffense [45]3 years ago

7 0

Answer:

1 feet/3 inches

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If the train went 390 miles in 3 hours what was the distance

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Answer:

13 is the answer.

Step-by-step explanation:

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3 years ago

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erastovalidia [21]

Answer:

$x = 3$

Step-by-step explanation:

$1 0x -3 + 3 = 5 + 1 2 + 3$

$1 0 x = 5 + 1 5$

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$\frac{5x}{5} = \frac{15}{5}$

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3 years ago

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A librarian wants to know many of her card members would buy used DVDs from the library. The library has 1162 card members. The

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The answer is around 914.

About 914 card members would buy used dvds from the library.

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3 years ago

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0 (Think of these as

bija089 [108]

Answer:

0.477 is the probability that the average score of the 36 golfers was between 70 and 71.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 70

Standard Deviation, σ = 3

Sample size, n = 36

Let the average score of all pro golfers follow a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(score of the 36 golfers was between 70 and 71)

$\text{Standard error of sampling} = \displaystyle\frac{\sigma}{\sqrt{n}} = \frac{3}{\sqrt{36}} = \frac{1}{2}$

$P(70 \leq x \leq 71) = P(\displaystyle\frac{70 - 70}{\frac{3}{\sqrt{36}}} \leq z \leq \displaystyle\frac{71-70}{\frac{3}{\sqrt{36}}}) = P(0 \leq z \leq 2)\\\\= P(z \leq 2) - P(z \leq 0)\\= 0.977 - 0.500 = 0.477= 47.7\%$

$P(70 \leq x \leq 71) = 47.7\%$

0.477 is the probability that the average score of the 36 golfers was between 70 and 71.

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4 years ago

Carolyn, Julia, and Roberta share $77 in a ratio of 4:2:1, respectively. How many dollars did Carolyn recieve?

user100 [1]

Answer:

4x = 44 which is Carolyn's share.

Step-by-step explanation:

Equation

Use a variable to find out how the sum of the ratios would be divided up to make 77 dollars.

4x + 2x + x = 77 Combine like terms on the left

Solution

7x = 77 Divide by 7

7x/7 = 77/7 Do the division

x = 11

Answer

4*11 = 44 which is Carolyn's share

2*11 = 22 which is Julia's Share

1*11 = 11 which is Roberta's share.

6 0

3 years ago