Answer:
First term (a) =8
Common difference (d)= t2-t1
=12-8
=4
Now, sum of first 31th term (tn31) =n/2{2a+(n-1)d}
= 31/2{2×8+(31-1)4}
=31/2{16+(30×4)
=31/2(16+120)
=31/2×126
=31×63
Step-by-step explanation:
Similarly use 19 as (n) for the 19th term
Answer:
no because the two smallest sides have to be bigger that the third side
Answer:
11.3m
Step-by-step explanation:
A=LW It's a square, so the length and width would be the same.
8 X 8 is 64, so your sides would be 8m long
So the length of the sides would be 8m and drawing a line from corner to corner would make a 45 45 right triangle with sides 8m long.
in a 45 45 right triangle, you just have to multiply one leg by √2 to get the hypotenuse. Therefore, to get the length of the lawn mower path from corner to corner, you would multiply 8 X √2 = 11.3m
Answer:
(-5 , 0)
(-2, 0)
(0, 20)
Step-by-step explanation:
y = 2x² + 14x + 20
x intercepts occur when y = 0
0 = 2x² + 14x + 20
0 = (2x + 4)(x + 5)
x = -5
or
x = -2
y intercept occurs when x = 0
y = 2(0)² + 14(0) + 20
y = 20
X + 9 = 11 doesn’t belong
x = 3 in all the other equations