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Step-by-step explanation:

19 men take 21 days working 15/2 hours per day.

Hours per day 45 men will take to complete in 7 days will be:

if 19 men = 15/2 hours

then 45 men = 19/45 hours ( this because the 45 men will take LESS hours per day, hence you USE the lesser fraction of the two values)

if 21 days = 15/2 hours per day

then 7 days= 21/7 (this because the hours required will be more, hence you use the larger fraction of the two values)

therefore the calculation is = 15/2 x 19/45 x 21/7

= (15x19x21)/(2x45x7)

= 19/2

= 9.5 hours per day

ANSWER:

The prime minister of India officially the Prime Minister of the Republic of India is the leader of the executive branch of the Government of India. The prime minister is the chief adviser to the PRESIDENT of India and the head of the Union Council of Ministers.

Step-by-step EXPLANATION:

Answer:

Since EVERY point on the x - axis has no distance (ZERO distance) from the x - axis, THEREFORE, the y - coordinate of every point LYING on the x - axis is always zero. THUS, the coordinates of any point on the x - axis are of the form (x, 0), where x is the distance of the point from the y - axis.

Step-by-step explanation:

Answer:

3000 vshsvhdvsjdvbdbhdjdb

In an equilateral triangle ABC. D,

E and Fare MIDPOINTS of side AB, AC

and BC RESPECTIVELY. If area of

triangle ADE IS 4 sq. cm , find area of

quadrilateral DECB

ANSWER:

consistent

Step-by-step explanation:

1/3 is not EQUAL to -2/4

it is not equal to 0/-20

Answer:

1 . In TRIANGLE ACB and triangle ECD

BC = CD

angle ACB = angle ECD ( vertically OPPOSITE angle)

angle ABC = angle CDE ( ALTERNATE angle )

so,

triangle ACB CONGRUENT to triangle ECD .

proved

ANSWER:

x/3-2=x/2+8

(x/3×6)-(2×6)=(x/2×6)+(8×6)

2x-12=3x+48

2x-3x=48+12

-x=60

x= -60

⇒ p⁴ -343p

⇒p(p³-343)

⇒p(p³-7³)

USING a³-b³ = (a-b) (a²+ab+b²)

⇒p(p-7) (p²+14p+49)

ANSWER:

Perimeter of square=80cm

EXPLAINATION:

Here in this question CONCEPT of Pythagoras theorem as WELL as perimeter of square is used. As we know that diagonals of a square forms an isosceles right angled triangle with the SIDES of square as shown in the attachment. So we can find the sides of square by using Pythagoras theorem. By substituting value of side in formula of perimeter of square, we can find its perimeter.

So LET's start!

Let us assume each side of square be x.

In ∆ ABC, AC is diagonal.

Applying Pythagoras theorem:

AC²=AB²+BC²

(20√2cm)²=x²+x²

800cm²=2x²

Divide 2 from both LHS and RHS.

400cm²=x²

√400cm²=x

√20cm×20cm=x

20cm=x

So each side of square is 20cm.

Now applying formula of perimeter:

★ Perimeter of square=4×Side

Perimeter of square=4×20cm

Perimeter of square=80cm

Hence the required perimeter is 80cm.

Answer:

If we add or remove a data POINT from the set, it can EFFECT the median, but it may not. In the set 1 , 2 , 3 , 4 , 4 , 6 , 6 1,\ 2,\ 3,\ 4,\ 4,\ 6,\ 6 1, 2, 3, 4, 4, 6, 6, the median is 4. The same will be true for adding in a new value to the data set.

PLZ MARK AS BRIANLIEST,FLW ME AND THX FOR THE SUPERB QUESTION

Answer:

c) 3p+p

(As it has TWO terms JOINED with HELP of an OPERATION.)

ANSWER:

-1

hope its HELP you

mark me as BRAINLIST

ANSWER:

2 is UR answer!!!!!!!!!!!

ANSWER:

YES it is POSSIBLE because it is EVEN NUMBER

ANSWER:

ok

Step-by-step explanation:

8/22 , 12/33 , 16/44 , 20/55

mark me in BRAINLIEST PLEASE.

ANSWER:

U he has kyfcho it fdcnko

Solution-
2(l+b)=20cm
2(6+b)=20cm
12+2b=20cm
2b=20-12 cm
2b=8
b=8/2
b=4cm
MARK ME AS BRAINLIEST

ANSWER:

(2) first one qnswer is Z.

(3) i don't know much CLEAR but i thing 3 is the coefficient .

(4) Third Question answer is 4x-2x.

(5) your last Q/A is clear is m+2,m+3,m+5.

I thing all ANSWERS are correct but one LEFT which i don't sure in Q 3.

ANSWER:

HI there I am ALSO not in any WAY I

ANSWER:

°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°°•◉Thx=Thx◉•°♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡♡

ANSWER:

USE DISTANCE formula

Step-by-step EXPLANATION:

√64+81=√145

Step-by-step explanation:

5. In the given figure, AP, AQ and BC are tangents to the circle. If

AB = 5 cm, AC = 6 cm and BC = 4 cm, then calculate the

length of AP (in cm)

B

P.

Jaldi SE Jaldi MERI help KIJIYE iss questions me

ANSWER:

OK so where is X in the EQUATION????¿¿¿¿

Answer:

Two digit numbers are formed using the digits 0,1,2,3,4,5 without REPETITION of the digits. ... (ii) Condition for event B : The NUMBER is divisible by 3. ∴B={12,15,21,24,30,42,45,51,54} ∴n(B)=9.

Step-by-step EXPLANATION:

ANSWER:

+2)(a-2)(a^2-2^2)=(a^2-2^2)(a^2-2^2)

=(a^2)^2-(2^2)^2=a^4-16

Step-by-step explanation:

31,35,36,42,43,47,71

n=7(EVEN)

mean=sigmax/n

=31+35+36+42+43+47+71/7

=305/7

=43.57

median=n+1/2

=7+1/2

=4TH TERM

=42

mode=71

Step-by-step explanation:

AREA of rings= area of outer PART - area of INNER part

= πr^2 -πr^2

= 22/7*21*21 - 22/7*14*14

= 770 cm^2

Answer:

Medium

Answer

Given  : sinθ=  

2

3

​  

​  

Let US first draw a right △ABC,∠B=90 degrees and ∠A=θ

We know that sin θ=  

AC

BC

​  

=  

HYPOTENUSE

(PERPENDICULAR)

​  

=  

2

3

​  

​  

By pythagoras Theorem:

AC  

2

=AB  

2

+BC  

2

or AB  

2

=AC  

2

−BC  

2

=4k  

2

−3k  

2

=k  

2

AB=k

FIND other T-rations using their DEFINATION:

cos=  

AC

AB

​  

=  

2

1

​  

tanθ=  

AB

BC

​  

=  

1

3

​  

​  

cscθ=  

sinθ

1

​  

=  

3

​  

2

​  

secθ=  

cosθ

1

​  

=2

cotθ=  

tanθ

1

​  

=  

3

​  

1

​

Step-by-step explanation:

ANSWER:

ROOT 74 HOPE it HELPS you

ANSWER:

it is TRUE

Step-by-step EXPLANATION:

Answer:

A & B WORK together for 2 days.

It WOULD take 8 more days had they continued to work together.

But, B only continues working for 12 more days. Splitting 12= 8 + 4, it is clear that B COMPLETES in 4 days that portion of work which A completes in 8 days.

=> Efficiency of A:B = 1:2

=> Time taken A:B = 2:1

Now 2x^2/3x = 10

=> x = 15

=> A alone can complete work in 2x or 30 days.

Step-by-step explanation:

A works for 2 days while B works for 2 + 12 days

In two days A & B together complete 2/10 = 20% work.

Remaining 80% work done by B in 12 days.

=> B alone completes full work in 12/80 x 100 = 15 days.

:-)

Given :       One NUMBER in a DATA set is changed

To  Find : will this AFFECT the mean of the given collection of data

Solution:

Mean =  Sum of all observations / number of observations

If   One number in a data set is changed then Sum of observation is changed

but number of observations are same

Hence Mean will be changed by change in observation / number of observations

Example  

2  3   5   7   8

Mean = (2 + 3 + 5 + 7 + 8)/5 = 25/5 = 5

3 is changed to 4

=> Mean = ( 2 + 4 + 5 + 7 + 8)/5 = 26/5 = 5.2

If Data is grouped data then mean is not changed if changed data is still in the same group

but Mean is changed if changed number is in other group

If one number in a data set is changed this will affect the mean of the given collection of data

Learn More:

for a given data 2,3,5,6,9 if observation 6.9 are replaced by 4 and 11 ...

brainly.in/question/8334923

If the first quartile is 142 and the semi-interquartile range is 18, find ...

brainly.in/question/13279139

Nia recorded her science and MATH scores. The measures of CENTER ...

brainly.in/question/30248060

look at the pic..◉‿◉

✎﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏

Please do not report if the answer is wrong, we have tried our BEST to GIVE you the correct answer}

ANSWER:

1. hfjdhdhhjrhhdhsbdbjssjjdjjnsnsdbndbdndsjsjsjjshsdjjdjdjdjdjjdd

Step-by-step EXPLANATION:

djrjjrrjjrjrjrjejjerj

jjwjejjsjwwjwjwjne.

plz mark me as BRAIN least

HI am Brunda

ANS. The unread by book % - 100

The NEW price of book - 50/100

50/100

= 50/100

= 5/10

= 1/2

THEREFORE the new book price is 1/2 or 0.5

Thank you have a nice DAY

Answer:

acceleration of gravity on MOON is 1/6 of acceleration of gravity on Earth

G(m)=g(E)/6

mg(e)=72

m=72/g(e)

weight on moon=mg(m)

=72*g(e)/g(e)*6

=72/6

=12N

answer is (a)

ANSWER:

The TOTAL number of TWO digit numbers that are DIVISIBLE by 4 are 22.

MARK ME BRAINLIEST

ANSWER:

Water droplets comes out from

the GAPS PRESENT in the glass.

Water vapour present in the air

precipitated.

ANSWER:

I don't KNOW if you have any QUESTIONS ASK me to do it

Answer:

10, 15, 20, 25, 30, 35

Step-by-step explanation:

There are MANY I have WRITTEN SIX of them

ANSWER:

SRY QUESTION is not CLEAR

Answer:

4√9

Step-by-step EXPLANATION:

MARK me as the BRAINLIST

ANSWER:

answer is (0,-4).... I HOPE

ANSWER:

SORRY I don't KNOW the answer

Answer:

10000

Step-by-step EXPLANATION:

THUS is the RIGHT BRO

ANSWER:

ITCHY ECCL rectum unfold Edwina hell IDEM.

Step-by-step explanation:

⇒ In FIGURE, PQRS is a cyclic quadrilateral.

⇒ The sides PS and QR are produced to MEET at B.

⇒ ∠QPB=∠QPR+∠RPS=40

o

+35

o

=75

o

---- ( 1 )

⇒ In △PBQ

⇒ ∠PBQ+∠BQP+∠QPB=180

o

[ Sum of ANGLES of triangle is 180

o

]

⇒ 30

o

+∠BQP+∠75

o

=180

o

⇒ ∠BQP=180

o

−105

o

∴ ∠BQP=75

o

--- ( 2 )

∴ ∠QPB=∠BQP [ From ( 1 ) and ( 2 ) ]

∴ △PBQ is isosceles triangle.

∴ PB=QB [ Sides of isosceles triangle ]

hope it's helpfull

Mark me as brainlist❗

Answer:

15

Step-by-step EXPLANATION:

Sin (A-B)=1/2     ALSO  Sin60°=1/2  therefore A-B=60

Cos (A+B)=1/2   also cos 30°=1/2.    Therefore A+B=30

Now by elimination method we GET A=45.

SUBSTITUTE THE VALUE OF A IN ANY ONE EQUATION TO GET B=15

Answer:

Distance between 1ST and LAST sapling = 7/4 m * 5

                                                                 = 35/4 m

                                                                  = 8.75 m OR 8 3/4 m