Answer:
see explanation
Step-by-step explanation:
The nth term of an AP is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given a₅ is double a₇ , then
a₁ + 4d = 2(a₁ + 6d) , that is
a₁ + 4d = 2a₁ + 12d ( subtract a₁ from both sides )
4d = a₁ + 12d ( subtract 12d from both sides )
- 8d = a₁
The sum of n terms of an AP is
= 
[ 2a₁ + (n - 1)d ] , substitute values
= 
( 2(- 8d) + 16d)
= 8.5(- 16d + 16d)
= 8.5 × 0
= 0
Answer:
378 pictures
Step-by-step explanation:
600 multiplied .63
Answer:
-14w²-7w+1
Step-by-step explanation:
(–7w2 – 2w – 1) – (–5w2 + 3w – 2)
-14w²-2w-2w-1 +10w²-3w+2
combine the like terms
-14w² + 10w² - 2w-2w-3w+2-1
-4w²-7w+1
The related multiplication fact to 3 x 5 = 15 is 4 x 3 = 12
<h3>Multiplication Facts</h3>
Given:
3 x 5 = 15
The expression a x b = c means that a is added to itself b times to give c
3x 5 means adding 3 in 5 places
That is:
3 x 5 = 3 + 3 + 3 + 3 + 3
A related multiplication fact is:
4 x 3 = 12
This is true because:
4 x 3 = 4 + 4 + 4 = 12
Learn more on multiplication facts here: brainly.com/question/10873737
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