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mart [117]
3 years ago
9

Which expression correctly represents “twice the sum of four and a number”? 2 (4 + n)

Mathematics
1 answer:
Mice21 [21]3 years ago
4 0

Answer:

2 (4+n) and (4+n) x 2

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A student wanted to find the sum of all the even numbers from 1 to 100. He said:
murzikaleks [220]

Answer:

The statements are incorrect as: The sum of even numbers from 1 to 100(i.e. 2550) is not double\twice of the sum of odd numbers from 1 to 100(i.e. 2500).

Step-by-step explanation:

We know that sum of an Arithmetic Progression(A.P.) is given by:

where 'n' denotes the "number" of digits whose sum is to be determined, 'a' denotes the first digit of the series and '' denote last digit of the series.

Now the sum of even numbers i.e. 2+4+6+8+....+100 is given by the use of sum of the arithmetic progression since the series is an A.P. with a common difference of 2.

image with explanation

Hence, sum of even numbers from 1 to 100 is 2550.

Also the series of odd numbers is an A.P. with a common difference of 2.

sum of odd numbers from 1 to 100 is given by: 1+3+5+....+99

.

Hence, the sum of all the odd numbers from 1 to 100 is 2500.

Clearly the sum of even numbers from 1 to 100(i.e. 2550) is not double of the sum of odd numbers from 1 to 100(i.e. 2500).

Hence the statement is incorrect.

Step-by-step explanation:

3 0
3 years ago
Solve the proportion 2/7= x/28​
Vlada [557]

Answer:

8

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
50 POINTS PLEASE HELP Segment JK has endpoint J(2,4) and K(6,2). You dilate the segment using a dilation centered at the origin
stira [4]

Answer:

C.

Step-by-step explanation:

7 0
3 years ago
On a piece of paper, show how to find the slope between these two points: (-1,5) and (3,13). Show all of your work and simplify
dybincka [34]
Use the formula m = y2 - y1
————
x2 - x1
(-1 is x1, 5 is y1) (3 is x2, 13 is y2)
13 - 5 8
——— = — = 2
3 - (-1) 4

2 is the slope
6 0
3 years ago
3
yan [13]

Answer:

7,854,000

because the 308 people would have to be at least 500 to round up to 7,855,000

5 0
2 years ago
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