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7nadin3 [17]
3 years ago
7

a jogger ran 4 miles, decreased her speed by 1 mile per hour, and then ran another 5 miles. If her total jogging time was 2 1/20

hours, find her speed for each part of her run.
Mathematics
1 answer:
LekaFEV [45]3 years ago
5 0
Let the speed of the joker initially be x mi/hr
after reduction, the new speed will be: (x-1) mi/hr
but
time=(distance)/(speed)
hence :
Total time taken will be:
4/x+5/(x+1)=41/20
solving for x we get:
x=21.585 mi/hr
thus the initial speed was 21.585 mi/hr after reduction the new speed was 20.585 mi/hr
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How many times does 4 go in to 82 evenly
vodomira [7]

use division;

82 ÷ 4 = 20.5

so 4 goes into 82 only 20 times evenly.

hope that helps :D

4 0
4 years ago
Find the value of the expression when b= 9 c= 5 and d=10 ............ ½d + c² - b
Minchanka [31]

Answer:

1/2d+c^2-b = 21

Step-by-st ep explanation:

= 1/2(10) + 5^2 -9

= 5 + 25 - 9

= 30 - 9

= 21

4 0
3 years ago
The number 1953125 is equal to 5^9. Explain how the information above tells you that it is not a square number. I've tried the a
ddd [48]

Answer:

5^{9} can not be expressed as a square of any other number.

Step-by-step explanation:

The number 1953125 is equal to 5^{9}.

Now, the above statement gives an idea that 1953125 i.e. 5^{9} is not a square number as 9 is not a multiple of 2.

So, we can not express 5^{9} as a square of any other number.

We can only express 5^{9} as (5^{4} )^{2} \times 5.

( Answer )

5 0
4 years ago
The table below shows which hand is favored by each person from a sample of 100 people (50 male and 50 female). Use the informat
Yuliya22 [10]

The probability that a randomly selected person from the sample will be female or left-handed will be 0.05.

<h3 /><h3>What is the probability?</h3>

Probability is synonymous with possibility. It is concerned with the occurrence of a random event.

Probability can only have a value between 0 and 1. Its simple notion is that something is very likely to occur. It is the proportion of favorable events to the total number of events.

Given data;

Total number of sample,n(S) = 100 person

No of female or left-handed is,n(E) =5

P(E) is the probability that a randomly selected person from the sample will be female or left-handed

The probability that a randomly selected person from the sample will be female or left-handed is found as;

P(E) = n(E)/n(S)

P(E) = 5 / 100

P(E) = 0.05

Hence the probability that a randomly selected person from the sample will be female or left-handed will be 0.05.

To learn more about probability, refer to the link: brainly.com/question/795909.

#SPJ1

6 0
2 years ago
Choose all the lengths that are equal to 3 yards 16 inches.
kodGreya [7K]

Answer:

A: 124 in

D: 2 yd 52 in

E: 10 ft 4 in

Step-by-step explanation:

we know that

1 ft=12 in

1 yd=36 in

we have

3 yd 16 in

Convert to inches

3 yd 16 in=3(36)+16=124 in

<em>Verify each case</em>

case A) 124 in

124 in=124 in ------> is true

therefore

124 in is equal to 3 yd 16 in

case B) 4 yd 4 in

Convert to inches

4 yd 4 in=4(36)+4=148 in

124 in=148 in ------> is not true

therefore

4 yd 4 in is not equal to 3 yd 16 in

case C) 3 yd 1 1/2 ft

Convert to inches

3 yd 1 1/2 ft=3(36)+1.5(12)=126 in

124 in=126 in ------> is not true

therefore

3 yd 1 1/2 ft is not equal to 3 yd 16 in

case D) 2 yd 52 in

Convert to inches

2 yd 52 in=2(36)+52=124 in

124 in=124 in ------> is true

therefore

2 yd 52 in is equal to 3 yd 16 in

case E) 10 ft 4 in

Convert to inches

10 ft 4 in=10(12)+4=124 in

124 in=124 in ------> is true

therefore

10 ft 4 in in is equal to 3 yd 16 in

8 0
3 years ago
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