Answer:
or
Step-by-step explanation:
The given triangles are similar, meaning that their corresponding sides are proportional.
The length of DC (I think its D) is 15 and the length of WZ is 3. ZY is in the same place as CE (16). Make a proportional relationship where Δ→Δ:
Insert the known values:
x is the value of ZY. Solve by cross multiplying:
Divide both sides by 15:
ZY is 3.2.
:Done
Answer:
Step-by-step explanation:
The graph that will lie above the x-axis will be having only positive values throughout its domain,
So, We have to check which graph is having y > 0 for every x.
clearly y will be negative for many values of x , as coefficient of variable is negative.
Put x = 0, you will get y as negative .
Since, Square of anything will always be positive , and here constant term is also positive , so, It will always be positive .
Thus, it is having its graph always above x axis.
Put x = 0 , y = -7, which is negative
