The value of a28 given a11 = 23 and a15 = −5 is -96
Given:
a11 = 23
a15 = −5
Where,
a1 = first term
d = common difference
a11 = a + 10d = 23
a15 = a + 14d = -5
a + 10d = 23 (1)
a + 10d = 23 (1)a + 14d = -5 (2)
subtract (1) from (2) to eliminate a
14d - 10d = -5 - 23
4d = -28
d = -28 / 4
d = -7
Substitute d = -7 into (1)
a + 10d = 23 (1)
a + 10(-7) = 23
a - 70 = 23
a = 23 + 70
a = 93
So,
a28 = <em>a + 27d</em>
= 93 + 27(-7)
= 93 + -189
= 93 - 189
= -96
Therefore, the value of a28 given <em>a11 = 23</em> and <em>a15 = −5</em> is -96
Learn more about arithmetic sequence:
brainly.com/question/6561461
Answer: The pencils produced by Click-O-Pen Company for 4 years = 
Step-by-step explanation:
Given :
Pencils produced by Click-O-Pen Company each year = 
Using unitary method:
Pencils produced by Click-O-Pen Company for 4 years = 
Thus Pencils produced by Click-O-Pen Company for 4 years =
Answer:
135
Step-by-step explanation:
135 by 3 is 45
by 5 is 27
Answer:
179 animals were still at the river
Step-by-step explanation:
There were 632 animals at the river.
A herd of 187 elephants and 266 zebras left the river area.
This means that 187 + 266 = 453 animals left the river area.
Remaining:
632 - 453 = 179
179 animals were still at the river
Triangle has 180 degrees
1 side=180
Then 180-150= 30 degrees
30/2 (for the other two sides)= 15
So, 150 degrees, 15 degrees and 15 degrees.
So it’s probably an isosceles triangle as the two bottom angles are the same number of degrees
Hope this helps :)
