Answer:
10
Step-by-step explanation:
add them all up
10+7+13+10+10=50
divide by the number of terms (5)
50/5=10
X=-2
Y=3
I guessed and checked, works for me most of the time
Width = x cm
Length = 4x - 16
Perimeter = x + x + 4x -16 + 4x - 16
28 = 10x -32
(+ 32 to both sides)
60 = 10x
6 = x
Width = 6cm
Length = (6x4) - 16
= 8cm
Step-by-step explanation:
(a) n² + 3
First term = 1² + 3 = 4
Second term = 2² + 3 = 7
Third term = 3² + 3 = 12
Fourth term = 4² + 3 = 19
10th term = 10² + 3 = 103
(b) 2n²
First term = 2(1)² = 2
Second term = 2(2)² = 8
Third term = 2(3)² = 18
Fourth term = 2(4)²= 32
10th term = 2(10)² = 200
Hence, this is the required solution.
