4x^2+23x+15=0
Δ=23^2-4*4*15=529-240=289
x1= (-23+17)/8=-6/8= -3/4
x2= (-23-17)/8=-5
4x^2+23x+15= 4(x+3/4)(x+5)=(4x+3)(x+5)
The would be 1 1/4
Ask me if you need me to explain
The second equation is y= -2x+8
so they intersect. they are opposite reciprocals. there is one solution.
First one
130 + 20x > 350 x = 11 20 * 11 = 220 130 + 220 = 350 11 weeks
Second one
30 + 15x > 90 x = 4 15 * 4 = 60 30 + 60 = 90 4 or more hours
Hope this helps :)
Answer:
im pretty sure its 1/12
Step-by-step explanation:
