Answer:
Hope This Helps
Step-by-step explanation:
The common difference (d) = 2
The first element (a) = 3.
So, the n-th term is
I = a + (n-1).d
= 3 + (n-1)×2
= 1 + 2n.
So the required sum is
= (n/2)(a + I)
= (n/2)( 3 + 1 + 2n)
= (n/2)(4 + 2n)
= n (n+2)
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-5 (2u+10)=2 (u_7) apply distributive property
-10u-50=2u-14 collect like terms
-10u-2u=50-14 when you move the number to the other side sign change
-12u =36 to get rid of 12 divide 12 on both sides
-12u/-12= 36/-12
U= -3
Let’s pick a paperback and a hardback
There are 4 x 6 possible choices
Now pick any three of the remaining 8 books
8C3 = 56
This means there are 4 x 6 x 56 = 1344 selections of 5 books that will contain at least one paperback and one hardback
8C3 means picking 3 from 8 without worrying about order
8C3 = 8 x 7 x 6 / (3 x 2 x 1) = 56
Answer:
Charlie is 20.5 inches tall
Step-by-step explanation:
Henry: 24 inches
3 and 1/2 inches taller than Charlie
Charlie: 24 - 3.5 inches
20.5 inches