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1 box contains 154 bookstherefore 36 boxes will contain 154×36=5544 books

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1)since he attemp all question and 9 are right so 6 are incorrectSo,9*4-2*6=36-12=24 marks

1)since he attemp all question and 9 are right so,9*4-2*6=36-12=24 marks

I.

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Q1.a. 59➕(-52)=59-52=7

Q2 b. (-21)➕(-42)=-21-42=-21

Q2.a. 6 months to 5 years=6 : (12✖5)(one year = 12 months)=6 : 60=1:10 =answer

b.65min :2hours and 30 min

=65 : ((60×2)+30)(1hour =60 min)=65 : (120+30)=65 : 150=13:30 = answer

I hate math man this why 100% of me says no all the time

a 59-52=7b -21-42= -63Q2a -1year 12 months 5years=12×5=60 months6/60=1:10b- 1hr=60 min2hr 50 min =2×60+50=17065/170=13:34

75+90+75+x = 360240+x= 360x = 360-240x= 120

(170-30)÷4+5×2-(2×20)-17×4140÷4+5×2-40-17×435+10-40-6845-40-685-68-63

36.4 × 5= 182.0 kg....

as 7 boxes weigh 36.4kghence weight of one box is 36.4/7=5.2kghence weight of 5 boxes will be =5.2*5=26kg

your answer is wrong please try after some time to perfect it

Given that,

In a class test containing 15 questions, 4 marks are given for every correct answer and (–2) marks are given for every incorrect answer.

Let the number of correct answer = x

Number of incorrect answers = y

Marks obtained by the student = 4(x) - 2y

Case(1) Bharathi attempts all questions.

Number of correct answers = 9

Number of incorrect = 15 - 9 = 6

So, x = 9, y = 6

Total score = 4x - 2y = 4(9) - 2 (6) = 36 - 12 = 24

Case(2) Hema attempts only 5 questions. All are correct.

So, Number of correct answers = 5

Incorrect Answers = 0

x = 5, y = 0

Total score = 4x - 2y = 4(5) - 2 (0) = 4(5)= 20 .

Therefore, Bharathi score is 24 , Hema score is 20 .

15x4=60; 7×-2=14; 60-14=46

Total questions in a class test = 15 questions Marks given for correct answer = 4 marks Marks given for incorrect answer = -2Gurpreet attempts questions = 15Correct answers of Gurpreet = 9 Inncorrest answers of Gurpreet = 15-9= 6Marks given to Gurpreet for correct answers = 9×4=36Marks given to Gurpreet for inncorrect answers= 6×-2= -12

Total score of Gurpreet =36+(-12)=36-12= 24

Therefore Gurpreet scored 24 Marks

From 7.30 am to 4.20 pm, there are 8 hours and 50 minutes.

11 hours and 50 minutes

8 hours and 50 minutes

let B gets x partthen A gets=66 2/3 %of x = 200x/3C gets 75% of A's partC gets=75% of 200x/3=50x200x/3 +x +50x=6354200x+3x+150x=19062353x=19062x=54A gets 200x/3=3600B gets x=54C gets 50x=2700

A's spending 90% therefore saving = 10%

B's spending 75% therefore saving = 25%

C's spending 60% therefore saving = 40%

Let us suppose A, B and C saves Rs. 3, 5 and 6 respectively.

10% of A's saving = Rs. 3100% of A's saving = (3/10)*100 = Rs. 30

25% of B's saving = Rs. 5100% of B's saving = (5/25)*100 = Rs. 20

40% of C's saving = Rs.6100% of C's saving = (6/40)*100 = Rs. 15

Divide Rs. 6500 in the ratio of 30 : 20 : 15 A's Share = (30/65)*6500 = Rs. 3000

B's Share = (20/65)*6500 = Rs. 2000

C's Share = (15/65)*6500 = Rs. 1500

let, 1)if a plane files 405km in 90 litres of fuelthen plane files 540km in X litres of fuel405*X=90*540X=90*540/405X=120 litres2)if a plane files 405km in 90litres of fuelthen plane will file Ykm in 50 litres of fuel405*50=90YY=405*50/90Y=225km

answer is 13 +3and -2=1

In a competitive exam positive 4 was alloted for each correct answer

It's an AP seriesSum of AP of n numbers= n/2(first term + last term)

n = 8, first term = 10, last term = 24

Sum = 8/2(10+24) = 4(34) = 136

it is addition topic

1_Radhika had answered 10 questions correctly and 10 answers incorrectly.2_Jay had answered 4 questions correctly and 16 questions incorrectly

Let X :- Drinks teaY:- Drink Both of themZ:- Drink CoffeeNow here give

X+Y+Z =50And X=14X+Y =30

So,Y = 30-X= 30 -14 = 16Now For Z

X+Y+Z =5014+16+Z=50Z=20

(d) is the right answer.

16 lb is the best answer because 16 is medium in size so d is answer

Noise pollutionisdefinedas an unwanted or disturbingsoundthat interferes with normal activities.Noiseis best described as any unwantedsound. ... From the car honk to the fire truck siren, these areall sources of noise pollution. Othersourcesinclude hair dryers, kitchen blenders, and even lawnmowers.

Let the quantities be 3x kg and 5x kgCost price of one kg tea leaves=200So cp for 3x kg =600xCp for 5x teq dust=120(5x)=600xProfit on leaves=600x(10%)=60xProfit on tea dust 15% of 600x=90xSp of all tea leaves=660xSp of all tea dust=690xTotal sp=27000660x+690x=270001350x=27000x=200So required quantities are 600kg and 1000kg

the answer is 60 and 100

f(x) = x/sin3x , when x ≠ 0

we know that when x→ 0, tye sinnx/x tends to n

so sin3x/x → 3

=> f(x) = x/sin3x = 1/3 , x≠0

and f(x) = 3 , when x = 0

SO, both are not equal , hence the function is discontinuous at x = 0

Given ratio of present age= 1:2 let ages be x,2x5yrs back ratio was 1:3so 5yrs back ages be x-5/2x-5 = y/3yso after 5 yrs ages are x+5/2x+5by solving we get 1st age = 10yrs ,2nd age = 20yrs.so after 5yrs ratio = x+5/2x+5 = 15/25 = 3/5 = 3:5

1>.Endothermic: Melting ice cubes. Melting solid salts. ... Converting frost to water vapor Exothermic:Combustion of fuels, Reaction of alkali metals and other highly electro positive metals with water.2>A reaction in which one of the reacting species loses electrons while the other gains electrons is known as reduction-oxidation reaction.3> 2Mg+O2=>2MgO

1 toy needs 3 batteries 6 toys needs 6×3=18 batteries

suppose

Prime factorize 175 we get 5 X 5 X 7 we know that age of 2 twins is same, so 2 same numbers are five so age of twins is 5 the only number left is 7 and hence will be the age of the other one. Hence answer is 7

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suppose two brothers present age is x and yso x:y=1:2so y=2xnow 5 years back ratio is 1:3(x-5)/(y-5)=1:33x-15=y-5now y=2xso 3x-15=2x-5x=10so y=20so after 5 years ages will be 15 and 25so ration is 15:25=3:5

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