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BaLLatris [955]
3 years ago
10

A college chemistry teacher wants to know whether taking a practice

Mathematics
1 answer:
Natalka [10]3 years ago
7 0
brainly.com/question/17278316
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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
X^2 = -8x - 7 Rewrite the equation by completing the square. What are the solutions?
gladu [14]

1) rewrite the equation by completing the square

(X+4)^2=9

2) what are the solution to the equation

Answer A= X=-4 plus and minus 3

6 0
3 years ago
Scored 72 times out of 150 what percent of his shots did he score?
Sholpan [36]
Whoever scored 72 shots out of 150. Did, In fact, score 48% of their shots.
 
Solution:
*To calculate the percentage represented by a ratio simply divide the numerator by the denominator and multiply by 100. 

72:150 (72/150)

72/150 

= 0.48

0.48(100) = 48

... 48%
6 0
3 years ago
Daniel’s doctor told him that 63 pounds of his total body weight is water.
bixtya [17]

Answer:

50% I believe_________________

8 0
3 years ago
Read 2 more answers
Find two numbers, both smaller than 150, that have a lowest common multiple of 882 and a highest common factor of 21.
GenaCL600 [577]

Answer:

42 and 21

Step-by-step explanation:

Just divide 882  by  21   to get 42  

3 0
1 year ago
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