Answered

21. What is the arithmetic mean between 15 and 40?
A 28 5
B 29

C26
D 275
22. Which of the following is a formula for arithmetic series?
A Sa+20 B.S. (a1 + an) C. Sn(a+d) d S = (1 + dan)
23. Which is the correct substitution in the formula of finding the sum of the first 10 multiples of 8?
AS. = 10/2 [2(8)- (10-1)8]
C. Sio= 10/2 [2(8)- (10-1)8)
B. Sg = 8/2 [2/8)-(8-1)8]
D Sio= 8/2 [218)- (10-1)8]
24. Which of the following statement is correct?
A The sum of first five prime numbers is 27. C The sum of the first five odd numbers is 26
B The sum of the first five even numbers is 31 D None of the above
25. Find the sum of the first 5 terms of the arithmetic sequence whose general terın is an =3n +5
A 70
B 60
C 100
D 85
26 A rocket rises 30 feet after 1 second 85 foot after?​

Sagot :

Andrecedric13viz

Answer:

1.C

2.A

3.B

4.D

5.A

Explanation:

Yan po kung mali comment below

Trishtenbaranganviz

Answer:

  1. D. 27.5

Solution:

step 1 Address the formula, input parameters & values.

Input parameters & values:

The given numbers are 15 & 40

step 2 Find the sum of the given two numbers.

sum = 15 + 40 = 55

step 3 Divide the sum by 2 to get the average.

average = 55/2

= 27.5

Thus, 27.5 is an average of positive integers 15 and 40.

2. B

3. A

4. A

5. B