Substitute 0 into X or Y first , then solve for the variable you isolated . 7(0) - 3y = 21 and then 7x - 3(0) = 21
Answer:
= 2
Step-by-step explanation:
The n th term of a geometric sequence is
= a
where a is the first term and r the common ratio
Given
= - 8, then ar = - 8 → (1)
Given
= 512, then a = 512 → (2)
Divide (2) by (1)
= , thus
r³ =- 64 ( take the cube root of both sides )
r = = - 4
Substitute r = - 4 into (1)
a(- 4) = - 8
- 4a = - 8 ( divide both sides by - 4 )
a = 2
Thus
= 2
Of course for a rectangle A = L × W and we need to be careful about the units.
Here that's
18900 sq cm = L × 180 cm
where the area's in sq cm so we converted the width. We get
L = 18900 / 180 = 105 cm
We're asked for the result in meters, so that's
Answer: 1.05 m
The perimeter of the outer rectangle is
18.4 m + 32.5 m + 18.4 m + 32.5 m = 101.8 m
Answer: 101.8 m
The area of the seating space is the big rectangle minus the small rectangle,
A = 18.4(32.5) - 15(28) = 178 sq m
Answer: 178 sq m