solve the Following
1.a) find the sum: 2/11 + 5/7 b) Find:-11/25 × 5/9
2.Simplify the expression and find the value if ×=2 8x+15- 12×-9
3.solve: a) 12m-9=39 b) ⅔ y =5
4.in a class test containing 15 questions 5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 for questions not attempted heena gets 7 correct answers and 7 incorrect answers what is her total score?
5.a) set up equation and solve: Add five to three times of a number K, you get 44. b) which is greater: -18/22, -20/22
Answers
here is the answer I hope it's helps
1. a) 2/11+ 5/7= (14+55)/77 (finding the LCM)
=69/77
b) 11/25 × 5/9 = 11/45
2. 8x+15- 12×-9 at x=2
(8×2) +15- (12×2) -9 = -2
3. a) 12m-9=39
12m=48
m=4
b) ⅔ y =5
y=15/2
4.
Given-
marks for correct answer= 5
negative marks for incorrect answer= 2
no. of correct answers = 7
no. of incorrect answers= 7
To find
Heena's total score
Solution
total score= (7×5) - (7×2) = 35-14 = 21
5.
a) 3K+5=44
3K=39
K=13
b) -18/22 is greater.
since the denominators of both the fractions are same so, the bigger numerator will make the fraction bigger than the other.
Hence -18/22 is clearly a greater fraction than -20/22
Also, if we plot both the integers on a no.line -18/22 will appear at the right of other.