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Kruka [31]
1 year ago
7

Find the value of common difference 'd' so that:(2d+1), (2d-1) and (3d + 4) are in AS.​

Mathematics
1 answer:
Luda [366]1 year ago
4 0

Answer:

They are in AP then common difference of successive no. is same

Step-by-step explanation:

3d+4 -(2d-1) = 2d-1(2d+1)

=> 3d+4-2d+1 = 2d-1-2d -1

=> d+5 = -2

=> d = -2-5

=> d = -7

Hence the value of d is -7

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Rom4ik [11]
Where's the area model?
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4 years ago
What is an 8 sided base pyramid name
fredd [130]
An octagonal based pyramid.
Unless you meant faces including the base in which case it is a heptagonal based pyramid.

Hope this helps :)
3 0
3 years ago
What is the solution to the equation –14 + x = 5?<br> a. –9<br> b. 9<br> c. 19<br> d. 5
Dahasolnce [82]
-14 + x = 5

First, regroup terms. / Your problem should look like: x - 14 = 5
Second, add 14 to both sides. / Your problem should look like: x = 5 + 14
Third, simplify 5 + 14 to get 19. / Your problem should look like: x = 19

Answer: C) 19


7 0
3 years ago
Laurie was scuba diving. Each time she dove 5 feet deeper, she would stop and clear her ears. After Laurie had checked her instr
Leona [35]

Complete question :

Answer:

(-5) * (20) * (3)

Step-by-step explanation:

Diving 5 feets deeper = descent = negative 5 Feets

Each time instrument is checked = (60/3) = depth of 20 feets

Number of times instrument is checked = 3

Hence, maximum depth :

Diving 5 feets deeper * Each time instrument is checked = depth of 20 feets * Number of times instrument is checked

(-5) * (20) * (3) = - 60

5 0
3 years ago
Here are the test scores for 8 students in Mr. M's class. 87, 55, 96, 38, 83, 64, 44, 81. What is the percentage of these test s
natulia [17]

Answer:

75%

Step-by-step explanation:

Given that the score of 8 students in Mr. M's class are 87, 55, 96, 38, 83, 64, 44, 81, the scores less than 84 are 55, 38, 83, 64, 44, 81.

These means that 6 student had scores less that 84 of the 8 students hence the percentage of these test scores that are less than 84

= 6/8 * 100%

= 75%

This means that 75% of the students had scores less than 84

7 0
3 years ago
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