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mafiozo [28]
3 years ago
9

Martin can run 1 mile in 7 minutes. What proportions can be written from this information?

Mathematics
2 answers:
jeka57 [31]3 years ago
8 0

Answer:

\frac{1}{7}=\frac{3}{21}

\frac{7}{1}=\frac{21}{3}

Step-by-step explanation:

Verify each case

case 1) \frac{1}{7}=\frac{3}{21}

Multiply in cross and then compare both sides

1*21=7*3

21=21 ----> is true

therefore

Is a valid proportion

case 2) \frac{1}{21}=\frac{3}{7}

Multiply in cross and then compare both sides

7*1=21*3

7=63 ----> is not true

therefore

Is not a valid proportion

case 3) \frac{7}{1}=\frac{3}{21}

Multiply in cross and then compare both sides

21*7=1*3

147=3 ----> is not true

therefore

Is not a valid proportion

case 4) \frac{7}{1}=\frac{21}{3}

Multiply in cross and then compare both sides

3*7=1*21

21=21 ----> is true

therefore

Is a valid proportion

case 5) \frac{1}{7}=\frac{21}{3}

Multiply in cross and then compare both sides

3*1=7*21

3=147 ----> is not true

therefore

Is not a valid proportion

Lynna [10]3 years ago
5 0

Answer:

a and d

Step-by-step explanation:

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8)Solve and rewrite using the distributive property __(__+__) = 12 +24​
Alla [95]

The distributive property will give answer 2 ( 6 + 12 ) = 12 + 24 .

The distributive law of multiplication over basic arithmetic such as addition and subtraction is known as distributive property .

According to this property , multiplying the sum of two or more addends by a number will give the same result as multiplying each addend individually by the no . and then adding the products together .

In other words, according to the distributive property, an expression of the form A ( B + C ) can be solved as A ( B + C ) = AB + AC.

2 ( 6 + 12 ) = 12 + 24 .

Hence , the distributive property will give answer 2 ( 6 + 12 ) = 12 + 24 .

To know more on distributive property follow link :

brainly.com/question/2807928

#SPJ9

6 0
1 year ago
Help please on this math problem: The prices of backpacks at a store are 22, 16, 39, 35, 19, 34, 20, and 26. Find the Mean Absol
Ivanshal [37]
Answer: 7.22
(note: this is a result after rounding. The result before rounding was 7.21875)

========================================================

Explanation:

Given Set of Values = {22, 16, 39, 35, 19, 34, 20, 26}

Add up the values: 22+16+39+35+19+34+20+26 = 211
Divide that sum by 8 as there are 8 values: 211/8 = 26.375

The mean is 26.375

Now subtract the mean from each data value. Apply the absolute value to ensure the difference is never negative

|22 - 26.375| = 4.375
|16 - 26.375| = 10.375
|39 - 26.375| = 12.625
|35 - 26.375| = 8.625
|19 - 26.375| = 7.375
|34 - 26.375| = 7.625
|20 - 26.375| = 6.375
|26 - 26.375| = 0.375

Add up those results
4.375+10.375+12.625+8.625+7.375+7.625+6.375+0.375 = 57.75
Then divide by 8 
57.75/8 = 7.21875

The mean absolute deviation of the prices is 7.21875
Rounded to two decimal places, it is 7.22
Since we're talking about money, it makes sense to round to the nearest penny.

4 0
4 years ago
11. In a sample of n=6, five individuals all have scores of X=10 and the sixth person has a score of x=16. What is the mean for
ahrayia [7]

Answer:

11

Step-by-step explanation:

Given that in a sample of n=6, five individuals all have scores of X=10 and the sixth person has a score of x=16

i.e. the data entries are

10,10,10,10,10,16

Sum = 66

No of items n = 6

Average = sum/no of entries

=\frac{66}{6} \\=11

Average is 11.

mean of this sample is 11

8 0
3 years ago
At Charles Walters Middle School, 25% of the students live more than 8 miles from school, What fraction of the students live mor
Vanyuwa [196]

Answer:

1/4

Step-by-step explanation:

0.25 = 1/4

8 0
2 years ago
Read 2 more answers
(04.07) Julie is at the store buying groceries. She needs to get a quart of orange juice and some peaches. The quart of orange j
hjlf

Answer:

f(x) is the total cost and x is the number of peaches.

Step-by-step explanation:

We know that each peach costs $0.75.  This means the expression 0.75x represents the total cost of peaches; this makes x represent the number of peaches.

We also know that $2.25 is the cost of juice.  Adding it to the cost of peaches gives us the total cost; this means f(x) represents the total cost.

5 0
3 years ago
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