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user100 [1]
3 years ago
8

Pleaseeeeeeee helpppppp

Mathematics
1 answer:
Helen [10]3 years ago
3 0

Answer:

its Adam

Step-by-step explanation:

If you divide all of them into per second you'll get

Franks runs 11 feet per sec

Emily runs 8.6 ft per sec

adam runs 13 ft per sec

noah runs 10 ft per sec

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Two cars travel at the same speed to different destinations. Car A reaches its destination in 17 minutes. Car B reaches its dest
Goryan [66]

Answer:

speed of car A =Speed of car B=0.8 miles/minutes.

Step-by-step explanation:

We are given that speed of car A is equal to speed of car B.

Also let car A travels x miles.

and car B travels y miles.

Car A  reaches its destination in 17 minutes.

this means that speed of car A is given by:  \dfrac{x}{17} miles/minutes  ( since speed is defined as the ratio of distance and time).

Car B reaches its destination in 32 minutes.

This means that the speed of car B is given by: \dfrac{y}{32} miles/minutes

as speed of both cars are equal this means:

\dfrac{x}{17}=\dfrac{y}{32}------(1)

Also we are given Car B travels 12 miles farther than Car A.

this means y-x=12

y=12+x------(2)

on using equation (1) and (2) we have:

\dfrac{x}{17}=\dfrac{12+x}{32}\\  \\32x=17(12+x)\\\\32x=17\times12+17x\\\\32x-17x=17\times12\\\\15x=122\times17\\\\x=13.6

Hence the speed of car A is 0.8 miles/minutes  ( since x/17 is the speed of car A)

Speed of car B=0.8 miles/minutes.



8 0
3 years ago
Thirty percent of the fifth grade students in a large school district read below grade level. The distribution of sample proport
fredd [130]

Answer: 0.9088  

Step-by-step explanation:

Given : \mu=0.30

\sigma=0.045  

Let x be a random available that represents the proportion of students that reads below grade level .

Using z=\dfrac{x-\mu}{\sigma , for x= 0.36 , we have

z=\dfrac{0.36-0.30}{0.045}=1.33333

Using standard normal z-value table,

P-value = P(

P(z [Rounded yo the nearest 4 decimal places.]

Hence, the probability that a second sample would be selected with a proportion less than 0.36 = 0.9088  

7 0
3 years ago
what is the median of-16 -20 -23 10 -1 10 -1 0 0 -10 7 11 17 22 15 19 16 17 35 29 17 19 22 16 24 25 17 25
yawa3891 [41]

Answer:

16

Step-by-step explanation:

-23, -20, -16, -10, -1, -1, 0, 0, 7, 10, 10, 11, 15, 16, 16, 17, 17, 17, 17, 19, 19, 22, 22, 24, 25, 25, 29, 35

3 0
3 years ago
What is the circumference of a circle with a radius of 20 units
Kaylis [27]

Answer:

125.66

Step-by-step explanation:

C = 2πr = 2·π·20 = 125.66371

5 0
2 years ago
3456 ÷ 42<br><br>(show your work)​
saul85 [17]

Answer:

82 with a remainder of 12.

6 0
3 years ago
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