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ser-zykov [4K]
3 years ago
14

How to factorise 7x+14

Mathematics
1 answer:
gregori [183]3 years ago
8 0
<span>7x+14 = 7(x+2)
_____________</span>
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How can the mean of the values in a numerical data set be calculated?
Kruka [31]

Answer:

C

Step-by-step explanation:

Mean is the average. To find mean, add all the numbers in a data set, then divide by the number of values.

Example: 1,2,3,4,5

Mean: 1+2+3+4+5= 15

Number of values: 5

15/5 = 3

Mean is 3

5 0
2 years ago
Read 2 more answers
at 1:30 in the afternoon an old freight train and a new dart express train pull out of the new garland station going in opposite
nydimaria [60]

Solution: The speed of old freight train is 0.5 miles per minute and the speed of new dart express train is 1.5 miles per minute.

Explanation:

Let the speed of old freight train is x miles per minute and the speed of new dart express train is y miles per minute.

It is given that the speed of the dart express train is three times faster than the freight train. So, it can be written as,

3x=y ....(1)

The trains are moving towards the opposite directions, therefore the distance between them is increased at the speed of (x+y) miles per minute.

Distance=Speed\times Time

The distance between both train in 15 minutes is represented by 15(x+y).

According to the given information the distance between trains is 30 miles in 15 minutes.

15(x+y)=30

x+y=2

Use equation (1) and put y=3x

x+3x=2

4x=2

x=0.5

Put this value in equation (1), to find the value of y.

y=3(0.5)

y=1.5

Therefore, the The speed of old freight train is 0.5 miles per minute and the speed of new dart express train is 1.5 miles per minute.

4 0
3 years ago
Find profit or loss %<br> A) cp= 150 and profit =250
Anon25 [30]

Answer:

166⅓ %

Step-by-step explanation:

250/150 × 100

500/3 = 166⅓ %

Or 166.67%

7 0
2 years ago
Find the simultaneous equation 2x+5+-4+4 ​
Evgesh-ka [11]
The answer is 2
-2x + 5
7 0
2 years ago
Qual o resultado da expressão 2m elevado a 2-5m+3,para m=3?
ipn [44]
The answer is m=4 because -3+2+5
7 0
3 years ago
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