Hi! I really need some help right now My algebra has not been very polished yet so I really need your help I have to submit this by tomorrow to my teacher Please Help a gal out!
1. Find the perimeter of a square, where 'a' is length of a side.
2. Find the perimeter of a rectangle, where it's length 'l' and breadth 'b'.
3. Side of an equilateral triangle is 'a', then find the perimeter of the triangle.
4. a × (b + c) = a × b + a × c. Mark True / False.
5. ab ≠ ba. Mark True / False.
6. Radius of a circle is 'r', find the diameter of the circle.
7. The length of one side of cube is 'a'. Find the sum of lengths of all the edges.
II. Tick the correct option:
1. 2n − 7 = __________.
a) Constant b) Variable
c) Zero d) None of these
2. 2⁄3 is a variable.
a) True b) False
3. The equation for the statement: one fifth of a number added to 20 is 25.
a) x⁄5 + 25 = 20 b) x⁄5 − 25 = 20
c) x⁄5 + 20 = 25 d) None of these
4. Mention the equation for the statement: twice the length ('a' meter)of the room is 240 meters.
a) 2a = 240 b) 2a + 240 = 0
c) a⁄2 = 240 d) None of these
5. Which of the following is an equation with a variable?
a) 20 − 5 = 12 b) x − 20 = 25
c) 75 ÷ 5 = 15 d) 2⁄5 + 25 = 20
6. a + 12 = 16, what is the value of 'a'?
a) a = 10 b) a = 6
c) a = 4 d) None of these
7. x⁄5 = 12, find the value of x.
a) 5 b) 25
c) 50 d) 60
8. If one pencil costs Rs.x, then the cost of 25 pencils is ________.
a) Rs.x b) Rs.25x
c) Rs.52x d) None of these
9. x = 3, which expression is correct.
a) x + 10 = 3 b) x + 4 = 7
c) x + 7 = 10 d) Both B & C
10. 5x + 7 = 32
a) x = 7 b) x = 4
c) x = 5 d) None of these
PLEASE HELP ME PLEASEEE
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Answer:
1. Perimeter of square = 4×length of side = 4a
2. Perimeter of rectangle = 2(length+breadth)
3. Perimeter of triangle = 3a
4. true
5.
6. diameter of circle = 2r
7.
II
1. d) none of these
2. false
3. a) x/5+20=25
4. a) 2a=240
5. b) x-20=25
6. c) a=4
7. d) 60
8. b) 25x
9. d) both B&C
10. c) x=5
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