We have to factor becasue
area=legnth times width
area=4x^2+28x+49
area=(2x+7)(2x+7)
area=(2x+7)^2
legnth =width
we arent' given area so we can't solve
but, , since it is a squaer room, legnth=width so √area=legnth=width
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Arithmetic sequence: must have a constant common difference.
3/20-1/10=(3-2)/20=1/20
5/30-3/20=(10-9)/60=1/60
Difference is not constant, so no.
Geometric sequence: must have a common ratio
30/20 / (1/10) = 15
5/30 / (3/20) = 100/90 = 10/9
ratio is not constant, so no.
The answer is (c) neither geometric nor arithmetic
Answer: 
Step-by-step explanation:
Given
Function is 
from (i) and (ii) we get
Answer:
C, -4
Step-by-step explanation:
slope=change in y/change in x
multiply both sides by 2/5
simplify the right side. 2/5 × 5 = 2 and 2/5 × 10 = 4
bring y to the other side by adding y on both sides
subtract 6 on both sides
so y is -4
