Answer:

Step-by-step explanation:

3/4 and 2/5 have a common denominator which is twenty so you can rewrite the equation with just knowing that



You can then multiply both sides by twenty to solve this equation.
Hope this helps.
Not necessarily the case, because the function tends to infinity when sin(x) approaches 0 and it is 1 (minimum value) when sin(x) = 1. Look at the picture to know what it looks like.
no real solutions
The conditions for the discriminant are
• If b² - 4ac > 0 then 2 real and distinct roots
• If b² - 4ac = 0 then 2 real and equal roots
• If b² - 4ac < 0 then no real solutions
In the graph you can see the point are crossing Y -1 and x= 2,
x-y=xy
2-1=1
Y=1