is the equation 2x(2)-2x-9=0??? If it is, then x=9/2, i think, sorry if my answer is wrong or I read your question incorrectly!
She had to make a 90 flat
hope this helps (;
Answer: multiply and estimate
Step-by-step explanation:
1.5 is the area which makes it the diameter
Answer: Not safe
Step-by-step explanation:
Let the angle of elevation of the ramp be θ, then:

But the maximum angle for the ramp cannot exceed 7.1°. The calculated angle of elevation will make it difficult, if not impossible, for motorized wheelchairs to get up the ramp.
Therefore, the ramp at the local library is not safe for motorized wheelchairs