x-(3x+4)=34
x= -19
-19-(3(-19)+4)=34
-19+(57-4)=34
-19+(53)=34
-19+53=34
34=34
therefore the first number is -19 and the second number is 53
Answer:
80 blue
Step-by-step explanation:
r=red
b=blue
4b+2r=6 lights in one light cluster
120/6=20 clusters
20 clusters of 4 blue lights =80
Answer:
C. 726 in^2.
Step-by-step explanation:
Each face has area 11^2 = 121 in^2 ( because each face is a square).
There are 6 faces so the total surface area = 6 * 121
= 726 in^2.
Answer:
Sₙ = √5/2 n (n + 1)
Step-by-step explanation:
<u>Given AP:</u>
<u>Rewriting as:</u>
- √5,√4*5,√9*5,√16*5,...
- √5, 2√5, 3√5, 4√5,..., n√5
<u>Common difference:</u>
<u>Sum of n terms:</u>
- Sₙ = 1/2n (a₁ + aₙ) =
- 1/2n (√5 + √5 + (n-1)√5) =
- 1/2n (n + 1)√5=
- √5/2 n (n + 1)
Sₙ = √5/2 n (n + 1)
