Pls answer this..No spamming allowed..Full explaination and working
Answers
Answer:
1.
Given :
y = - 30
We have to find value of x :
a ) .
y = x + 11
- 30 = x + 11
= > x = - 30 - 11
= > x = - 41
b ) .
y = - 2 x - 32
- 30 = - 2 x - 16
= > - 15 = - x - 8
= > 15 = x + 8
= > x = 15 - 8
= > x = 7
c ) .
y = - 3 x - 1
= > - 30 = - 3 x - 1
= > 30 = x + 1
= > x = 30 - 1
= > x = 29
d ) .
y = 5 x - 10
= > - 30 = 5 x - 10
= > 5 x = - 30 + 10
= > 5 x = - 20
= > x = - 20 / 5
= > x = - 4
2 ) .
Given :
x = - 6
We have to find value of y :
a ) .
y = x + 3
= > y = - 6 + 3
= > y = - 3
b ) .
y = 2 x - 72
= > y = - 12 - 72
= > y = 84
c ) .
y = 3 x - 65
= > y = - 18 - 65
= > y = - 83
d ) .
y = 4 x - 26
= > y = - 24 - 26
= > y = - 50
3 ) .
a ) .
Given :
Length and breadth of rectangle are 12 m and 5 m respectively.
Area of rectangle = l × b
= > Area of rectangle = 12 × 5 m²
= > Area of rectangle = 60 m²
Perimeter of rectangle = 2 ( l + b )
= > Perimeter of rectangle = 2 ( 12 + 5 ) m
= > Perimeter of rectangle = 2 ( 17 ) m
= > Perimeter of rectangle = 34 m
b ) .
Given :
Sides of triangle as 20 ft , 48 ft and 52 ft.
Perimeter of triangle = a + b + c
= > Perimeter of triangle = 20 + 48 + 52 ft
= > Perimeter of triangle = 120 ft
Area of triangle = 1 / 2 × Base × Height
= > Area of triangle = 1 / 2 × 48 × 20 ft²
= > Area of triangle = 48 × 10 ft²
= > Area of triangle = 480 ft²
c ) .
Given :
Two parallel side of parallelogram are 14 m and 5 m. Also height of parallelogram is 3 m .
Perimeter of parallelogram = 2 ( Sum of parallel side )
= > Perimeter of parallelogram = 2 ( 5 + 14 ) m
= > Perimeter of parallelogram = 2 ( 19 ) m
= > Perimeter of parallelogram = 38 m
Area of parallelogram = Base × Height
= > Area of parallelogram = 14 × 3 m²
= > Area of parallelogram = 42 m²
4 ) .
a ) .
- 8 / 9 - 4 / 6
= > - 8 / 9 - 2 / 3
= > ( - 16 - 12 ) / 18
= > - 28 / 18
= > - 14 / 9
b ) .
4 / 5 - 7 / 25
= > ( 20 - 7 ) / 25
= > 13 / 25
c ) .
1 / 6 - 2 / 10
= > 1 / 6 - 1 / 5
= > ( 5 - 6 ) / 30
= > - 1 / 30
d ) .
9 / 10 - 1 / 2
= > ( 9 - 5 ) / 10
= > 4 / 10
= > 2 / 5
Hence we get all required answer.
Answer:
Perfect questions for guys interested in maths..
2. The value of x + x(xx) when x = 2 is:
(a) 10, (b) 16, (c) 18, (d) 36, (e) 64
Solution:
x + x(xx)
Put the value of x = 2 in the above expression we get,
2 + 2(22)
= 2 + 2(2 × 2)
= 2 + 2(4)
= 2 + 8
= 10
Answer: (a)