Answer:
how much do the hats cost
Answer:
given
n=9
a=1
d=3-1=2
Step-by-step explanation:
now , by formula,
sn = n/2(2a+(n-1)d)
= 9/2(2×1+(9-1)×2)
=9/2×18
=81
Answer:
D
Step-by-step explanation:
Answer:
A).
B).
Step-by-step explanation:
A).
To get the square root of the given expression we will convert it into the square form.
[Since 2×2 = 4 and ]
Therefore,
B).
Since,
Therefore, [Since 3² = 9 and (m⁷)² = m¹⁴]
First: 7cm, 7cm, 11cm
second: 19cm, 3cm, 3cm