hey everyone please help me
Answers
Answer:
39. yes
40.
a) -4
b)-1
41. 3/4>2/7
42. 100m
43. 5/8
44. Rs (8x+5y)
step by step explanation
39.Given 2l+3=7
L.H.S. = 2l+3
put l=2
= 2(2)+3 =7 = R.H.S.
40. a) 3-7= -4
b) -5-(-4)= -5+4=-1
41. 2/7 and 3/4
LCM of 7 and 4 =28
= (2/7)(4/4) and (3/4)(7/7)
= 14/28 and 21/28
Denominators are same , comparing numerators
21>14
=>3/4>2/7
42. Let length of rectangular park be l
Area of rectangular park=400m²
Breadth of park =4m
Since , formula of area of rectangle = l ×b
=> l × 4 =400
=> l= 400/4
=> l=100m
43. total length=7/8
length of first piece=1/4
length of 2nd piece = (7/8)-(1/4)
= (7/8) -(2/8)
= 5/8
44. Cost of one chair= Rs x
Cost of one table = Rs y
Therefore, Cost of 8 chairs = Rs 8x
And, Cost of 5 tables = Rs 5y
Total cost = Rs(8x+5y)