Let's assume length of the room as y
so the width of the room = y - 5
Area
y * (y - 5) = 750
Answer:
6 hrs
Step-by-step explanation:
4:5
2.4 : 3.2
2.4+3.2=6 hrs
Answer:
8/9
dont want full credit just want points
Answer:
1083 seats
Step-by-step explanation:
i just answered that.
arithmetic sequence
a1 = 10
an = an-1 + 1 = a1 + (n-1)×1 = 10 + (n-1) = 9 + n
a38 = 9 + 38 = 47 seats
the sum of such an arithmetic sequence
n×(a1 + an)/2
in our case
38×(10 + 47)/2 = 19×57 = 1083 seats
(3 +
) × (3 -
)
Take the special case
(a - b)×(a + b)=a² - b²
a = 3
b =
3² - (
)² {(√)² = the number itself}
9 - 5
4
