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WINSTONCH [101]

2 years ago

15

Train A and Train B leave the station at 2 P.M. The graph below shows the distance covered by the two trains. Compare the speeds

of the two trains.

1 answer:

adoni [48]2 years ago

8 0

Answer:

Train b is moving faster than a by 45 units an hour

Step-by-step explanation:

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Red, green, and white jellybeans are combined in a ratio of 5:4:3, respectively. What is the ratio of green jelly beans to the t

Rainbow [258]

We have been given that red, green, and white jellybeans are combined in a ratio of 5:4:3 respectively. We are asked to find out the ratio of green jelly beans to the total number of jelly beans.

In order to find out the ratio of green jelly beans to the total number of jelly beans we have to find out the total number of jelly beans.

$\text{Total number of jelly beans}=5+4+3=12$

Now we can find out out our desirable ratio by substituting our finding in the ratio.

$\text{Number of green jelly beans}:\text{Total number of jelly beans}=4:12\\=1:3$

Therefore, ratio of green jelly beans with respect to all jelly beans is 1:3.

6 0

2 years ago

Which represents a side length of a square that has an area of 450 square inches? 15 sqrt 2 in. 15 sqrt 3in. 112.5 in. 115.5 in.

luda_lava [24]

$\sqrt{450}=\sqrt{3^2\cdot 5^2\cdot 2}=15\sqrt{2}$

first choice is correct

7 0

2 years ago

Read 2 more answers

the volume of solid A is 28m3 and the volume of solid B is 1,792m3. If the solids are similar, what is the ratio of the surface

Maslowich

If k is the scale factor between the dimensions of the similar solids, the areas are related by k² and the volumes are related by k³. That is
$\ \ \dfrac{V_{a}}{V_{b}}=k^{3}$
$\ \ k=(\dfrac{V_{a}}{V_{b}})^{\frac{1}{3}}$

The areas are related by k², so
$\ \ \dfrac{A_{a}}{A_{b}}=k^{2} = (\dfrac{V_{a}}{V_{b}})^{\frac{2}{3}}$
$\ \ \dfrac{A_{a}}{A_{b}} = (\dfrac{28\ m^{3}}{1792\ m^{3}})^{\frac{2}{3}}=(4^{-3})^{\frac{2}{3}}$
$\ \ =4^{-2}=\dfrac{1}{16}$

The ratio of the surface area of solid A to that of solid B is ...
1/16

6 0

2 years ago

A toy car costing $50 is reduced by 10% in the sale. How much does it cost now? Show me your work plz

wlad13 [49]

Answer:

$45

Step-by-step explanation:

divide 50 by 100 (as in 100%) then multiply it by 90 (as in 90%)

50 ÷ 100 × 90 = 45

5 0

2 years ago

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A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. A fre

JulsSmile [24]

Answer:

SD = 7588.09

Step-by-step explanation:

Check the distribution table attached to for the step by step solution:

The formula for the mean, $\bar{x} = \frac{\sum fx}{\sum f}$

$\bar {x} = \frac{1410040}{80} \\\bar {x} = 17625.5$

The variance , $V(X) = \sqrt{\frac{\sum f(x - \bar{x}^2)}{n-1} }$

$V(X) = \frac{4548750000}{80 - 1} \\V(X) = 57579113.92$

Standard Deviation,

$SD = \sqrt{V(X)} \\SD = \sqrt{57579113.92}$

SD = 7588.09

7 0

2 years ago

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