Answer:
yes, its a heptagon
Step-by-step explanation:
Answer:
if you use a calculator its easy
16.72 - 1.24 = 15.48
15.48 divided by 12 is 1.29
for sales tax 1.24 divided by 12 is .10
so for each one She spent $1.39
Answer:
291 - 5y
Step-by-step explanation:
x- a measure of the fourth angle
The equation
Step-by-step explanation:
Sn=n/2(2a+(n-1)d)
910=n/2{2a+(n-1)d}
1820=n{2a+(n-1)d}
1820=20{2a+(20-1)d}
1820=20{2a+19d}
91=2a+19d
An=a+(n-1)d
95=a+(20-1)d
95=a+19d
91=2a+19d
---------------
4=-a
a=-4
91=2a+19d
91=2(-4)+19d
91=-8+19d
91+8=19d
99=19d
d=99/19
A=-4
