A.) x (5 + x) = 5x + x^2
B.) 2 (5 + x) = 10 + 2x
28% equals 28/100. So, 28% equals 28 per 100.
Answer:
y= 3, (-5/4)
Step-by-step explanation:
4y^2-7y=15
4y^2 - 7y -15
(y-3)(4y+5)
Let x be one number and y be the other.
#1 - Set up a system of equations.
4x = y
x + y = 45
#2 - Solve the system by substitution.
x + (4x) = 45
5x = 45
x = 9
(9) + y = 45
y = 36