What is bad ??!????????????!
(9 × 10) + (20x + 21) = 571
90 + 20x + 21 = 571
111 + 20x = 571
- 111
20x = 460
÷ 20
x = 23
I hope this helps!
(a) * (a+1) = 420
a^2 + a = 420
a^2 + a - 420 = 0
(a+21)(a-20) = 0
a = -21 OR 20
The two integers can be -21 and -20, OR 20 and 21.
Root: (-4/3, 0)
vertical intercept: (0, -4)
T 1 2 3 4
B 3 6 9 12
This is linear relationships B=3*T (it can be also called directly proportional)