Answer:
can someone please answer mine too
Step-by-step explanation:
TYYY
Answer:
x = - a
Step-by-step explanation:
Multiply both sides by 2 to eliminate the fraction
2T = n(a + x)d
Since n and d are both multipliers, divide both sides by nd
= a + x
Isolate x by subtracting a from both sides, hence
x = - a
Answer:
126
Step-by-step explanation:
The number of seats in each row can be expressed in the sequence
50, 54, 58, 62, ..... ,
This is an arithmetic sequence with n th term
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 50 and d = 4 , then
a₂₀ = 50 + (19 × 4) = 50 + 76 = 126
That is there are 126 seats in the 20th row
Answer:
The area is 77 ft.
Step-by-step explanation:
The formula for area of a trapezoid is 1/2 (base1 + base2) x height.
So, 1/2 (14+8) x 7 = 77.