Answer:
x = - 7, x = 0
Step-by-step explanation:
Given
x² + 7x = 0 ← factor out x from each term on the left side
x(x + 7) = 0
Equate each factor to zero and solve for x
x = 0
x + 7 = 0 ⇒ x = - 7
Based on ur graph, in a class of 90 students (20 rock, 40 hip hop, and 30 country...added = 90) , 30 chose country....30/90 reduces to 1/3.....so 1/3 chose country.
In a class of 450 students......1/3 * 450 = 450/3 = 150 chose country
Hope this helps!
2y(4z)=8yz
each major road of city y you have 4 different routes so if there're 2 routes of city y then double the number of routes and you get 8 different roads to travel in from x to z through y
To solve this you have to divide 90 by 10 which would be 9 so
t=9
Hope it helps
