All categories

4 years ago

(a/20)+(4/15)=(9/15)

1 answer:

7 0

(a/20)+(4/15)=(9/15)
a/20 = (9/15)-(4/15)
a/20 =5/15
a/20 =1/3
a=20/3

You might be interested in

A man has twin sons of equal height. The combined

Anuta_ua [19.1K]

Answer:

son weight = 72

Step-by-step explanation:

D + S = 180

D + 2S = 252

S=252-180

S = 72

D= 108

3 0

3 years ago

. Freddie swam 3/8 laps yesterday and 1/4 today. How many laps did he swim in total? IS

Ronch [10]

Answer:

5/8

Step-by-step explanation:

Freddie swam 3/8 laps yesterday

He also swam 1/4 laps today

Therefore the total lap swam can be calculated as follows

= 3/8 + 1/4

= 5/8

Hence the total lap is 5/8

8 0

3 years ago

Please can someone do this for me? thanks alot x

Nimfa-mama [501]

Answer:

Learning Objective: Use the mean and range to compare the spread and averages.

a) Sarah Mean = 70.9, Katie Mean = 78.9

b) Sarah Range = 15, Katie Range = 25

c) Sentences

- The mean shows, on average, Sarah was 8 seconds quicker than Katie.

- The range shows that Sarah was more consistent with her times. Katie had a larger spread of times which shows she was less consistent.

Step-by-step explanation:

Given:

Sarah's Data Set:

79, 70, 68, 75, 69, 64, 69, 75, 64, 76

Katie's Data Set:

79, 79, 76, 81, 89, 76, 64, 85, 82, 78

To Find:

The mean and range of both data sets separately.

Work:

The mean of a data set is commonly known as the average. You find the mean by taking the sum of all the data values and dividing that sum by the total number of data values. The formula for the mean of a population is $\mu = \frac{{\sum}x}{N}$ .

The formula for the mean of a sample is $\bar{x} = \frac{{\sum}x}{n}$ .

Both of these formulas use the same mathematical process: find the sum of the data values and divide by the total. For the data values given above, the solution is: $\frac{709}{10} = 70.9$

Therefore, the mean of Sarah's data set is 70.9.

For Katie's Data Set, $\frac{789}{10} = 78.9$ .

Therefore, the mean of Katie's data set is 78.9.

To fill in the summary, we have to use the data we just calculated.

That summary can be found in the answer section.

4 0

2 years ago

Read 2 more answers

Draw counters to make 10 using number 7 and 8 .

Eva8 [605]

You could take @ birthday candle (7&8) and warm the wax to draw a 10 on your paper or if u need to write 7 and 8 in the shape of a counter, u could either:

1) draw 7 and 8 on your paper and circle the parts that look like 10 7 could be a slanted 1 and 8 could be your 0

2) you could draw parts of 7 and 8 to make it look like 10

4 0

4 years ago

Using polygon STUVW what is m angle U ?

bija089 [108]

Answer:

The m∠ U is 72°.

Step-by-step explanation:

Given:

$\angle S = 90\\\angle T = 2x\\\angle U = x\\\angle V = 2x\\\angle W = 90\\$

To find :

$\angle U = x = ?$

Solution:

The sum of the measures of the interior angles of a polygon with 'n' sides is given as

$\textrm{sum of the measures of angle of a polygon with 'n' sides} = (n - 1)\times 180$

Here we have n = 5 on substituting the values we get

$\angle S +\angle T + \angle U +\angle V + \angle W = (5 -2)\times 180\\90 + 2x + x + 2x + 90 = 3\times 180\\5x + 180 = 540\\5x = 540-180\\5x = 360\\x = \frac{360}{5}\\x = 72$

Therefore,

m∠ U is 72°.

4 0

3 years ago