Is this from khan academy?
Answer:

Step-by-step explanation:
3u=y/x^2-d^2
3u=y-(xd)^2/x^2
u=y-(xd)^2/3x^2
Answer:
I bellive its 4
Step-by-step explanation:
This is because 1,2,3 are for sure wrong. So if its not 4, its 5. But 95% sure its 4
The best design for this study is to do an independent and dependent experiment of the outcomes from different types of soils for tomato plants.
A=h*b/2
180 =(b-2)*b/2
360 = b^2-2b
b^2 -2b -360 =0
D = 4+1440 = 1444
b_1,2 = (2+/-sqrt1444)/2 = -18 and 20
base length equal 20 in
height equal 18 in
hope helped