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<P>Answer:

let p(X)= 2x^2-1x-15

let alpha (a) and Bita( B) be the ZEROS of a quadratic polynomial p(x)

we know that sum of zeros = alpha + Bita

:- -b/a= -(-1/2) =( a+B) alpha + Bita

. -b/a= 1/2

sum of zeros = 1/2

Answer:

U mean parallel

In geometry, parallel lines are lines in a plane which do not meet; that is, two straight lines in a plane that do not intersect at any point are SAID to be parallel. Colloquially, CURVES that do not touch each other or intersect and keep a fixed minimum distance are said to be parallel.

A1 i)Commutative property of multiplication

ii)Commutative property of multiplication

A2 i) 4/5 x 7/-8 = 7/-8 x 4/5

ii) ( 3/-5 x 2/-8) 4/-7 =3/-5 (4/-7 x 2/-8)

iii) -4/7 x 0 = 0

A3 To prove:- a x B = b x a

LHS: a x b = 7 / 8 x 1 / 7 = 1/8

RHS: b x a = 1/7 x 7 / 8 = 1/8

LHS = RHS

A4 To prove:- x(y × z) = (x × y)z

LHS: x(y × z) = 2 / 5 (-4 / 3 × 8 / 9) = 2/5 × (-32/27) = -64/135

RHS: (x × y)z = (2/5 × -4/3) 8/9 = -8/15 × 8/9 = -64/135

LHS = RHS

Hope I helped

ANSWER:

So SEE the above PICTURE for GIVEN QUESTION

ANSWER:

UM what's the QUESTION again.....

Time, Speed and Distance- Ratio Concept

Learn the ratio concept to solve questions from time, speed and distance with the help of solved EXAMPLES

The concept of ratio is a very important tool while solving questions in any aptitude-based paper. A lot of calculations can be avoided by applying basic concepts of ratio. In this article we will learn to apply ratio to solve Time, Speed and Distance (TSD) questions.

Basic Concept

The basic formula says Speed= Distance/Time . From this formula, it is evident that speed is directly proportional to distance and inversely proportional to time.

Basically, it means if two objects have their speeds in the ratio a:b,

Distance covered by the two objects in same time will be in the ratio a:b;

Time taken by the two objects to cover same distance will be in the ratio b:a.

Let us apply this concept to some examples given below.

Solved Examples

Example 1: If I travelled at 3/4th of my average speed and reached 25 minutes late, what is the time that I usually take to reach my destination?

Solution: Although this question can be solved by making a simple EQUATION, still the use of ratio can eliminate the calculation-work.

Since, the current speed is 3/4th the average speed, we can take the current speed as 3km/hr and the average speed as 4km/hr so that the ratio of the speeds is 3:4.

As the distance covered is same in both the cases, so the time taken will be in the ratio 4:3 (in the reverse ratio of speeds).

It means that if today, I took 4 minutes then on an average I take 3 minutes i.e. I am one minute late.

Now apply simple chain RULE that, if I am late for 1 minute, the usual time taken is 3 minutes and if I am 25 minutes late, the normal time taken will be 25 x 3 = 75 minutes.

Example 2: A thief flees city A in a car towards city B on a stretch of straight road, 400 kilometers long, at a speed of 60 KM/hr. In 30 minutes a police party LEAVES city A to chase the thief at 80 km/hr. Find the distance travelled by the police when it catches thief.

Solution: In this question the thief travelled for the first 30 minutes. The speed of thief is 60 km/hr, so he has covered 30 km in 30 minutes.

The ratio of speeds of thief and police is 60: 80 or 3: 4.

Excluding the first 30 minutes, the thief and the police have run for the same time. So the distance covered is in the ratio of their speeds i.e. 3: 4.

Since, the initial distance between the thief and the police if 30 km, so in total, thief and police have covered 90 km and 120 km respectively (to make the ratio 3:4).

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Answer:

5<049<81

Step-by-step explanation:

5,049,81 are in ascending order

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ANSWER:

there no SPACE & i dont see your FILL space so

Step-by-step explanation:

by RATIONALIZING the DENOMINATOR I got the value

at LAST I have compared the a+broot6 I got the value of a as 2 and B as 5by6

Answer:

23

Step-by-step EXPLANATION:

SUM of angles of a triangle=180

So,

(3x + 16) + 45 + 68= 180

3x + 129= 180

3x=180-129

3x=69

x= 23

ANSWER:

Step-by-step EXPLANATION:

sin30=1/2

cos60=1/2

cos45=1/sqrt(2)=sin45

sin90=1

cos90=0

now

4(1/16+1/16)-3(1/2-1)+5*0

=4(2/16)-3(-1/2)

=1/2+3/2

=2

Step-by-step EXPLANATION:

its your ANSWER.......................................

Answer:

58.78 cm sq or (24 under root 6)

Step-by-step explanation:

SIDE of TRIANGLE = (10+12+14)/2

=36/2

=18

AREA =

Area =58.78 cm sq

ANSWER:

gggyyuioi9 and CHE and CHEER him

Answer:

Step-by-step explanation:

tan x = SIN x cos x . The COTANGENT of x is defined to be the COSINE of x divided by the sine of x: cot x = cos x sin x . The secant of x is 1 divided by the cosine of x: SEC x = 1 cos x , and the COSECANT of x is defined to be 1 divided by the sine of x: csc x = 1 sin x .

Hope it helps you.

ANSWER:

answer is n

HOPE this HELPS you

Answer:

1+1=6

2+5=7

3+4=9

6+8=14

7+9=16

ANSWER:

The additive inverse of a number is what you add to a number to CREATE the sum of zero. So in other words, the additive inverse of x is another number, y, as long as the sum of x + y equals zero. ... For example, the additive inverse of the positive number 5 is -5.

Answer:

• Amount = Rs. 5618
• Compound Interest = 618

Step By Step Explanation:

Given:

• Principal Amount = Rs. 5000
• Time = 2 years
• Rate = 6%

To Find:

• Amount
• Compound Interest.

Now, we know that

=> Amount = P[1 + (r/100)]ⁿ

=> Amount = 5000[1 + (6/100)]²

=> Amount = 5000[(100 + 6)/100]²

=> Amount = 5000[106/100]²

=> Amount = 5000[1.06]²

=> Amount = 5000 × 1.1236

=> Amount = Rs. 5618

Hence, Amount = Rs. 5618

Now, we will find Compound Interest,

=> CI = Amount - Principal Amount

=> CI = 5618 - 5000

=> CI = 618.

ANSWER:

Step-by-step EXPLANATION:

Answer:

Step-by-step explanation:

----> Can use to FIND AREA of LAND and hence depending on area and demand, can sell it

----->Learning area of plane figures, if there is an alternate way to find its area, you can find its ht and base

------>Can find area of a HOUSE before selling it or buying it

ANSWER:

this is the answer of the FOLLOWING QUESTION

ANSWER:

12

Step-by-step EXPLANATION:

by seeing the figure you can UNDERSTAND the answer

hope it is useful

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Answer:

1. 7 + 7 = 14
2. 20 - 10 = 10

HOPE it HELPS

ANSWER:

Answer. The ANSWER2 are: x=kπ and π4+kπ . The EQUATION can be WRITTEN: cos2x+cos2xtan2x=1⇒cos2x+cos2xsin2xcos2x=1⇒cos2x+sin2x=1⇒sin2x+cos2x=1 .

ANSWER:

-COEFFICIENT of x/coefficient of X2

Answer:

5,81,723 are ASCENDING ORDER

Answer:

LET the initial velocity of the object = u

Let the object is moving with uniform acceleration, a.

Let object reaches at point B after time, t and its FINAL velocity becomes, v

Draw a line parallel to x-axis DA from point, D from where object STARTS moving.

Draw ANOTHER line BA from point B parallel to y-axis which meets at E at y-axis.

Let OE = time, t

Now, from the graph,

BE = AB + AE

⇒ v = DC + OD (Since, AB = DC and AE = OD)

⇒ v = DC + u (Since, OD = u)

⇒ v = DC + u ------------------- (i)

Now, Acceleration (a) =Change in velocityTime taken=Change in velocityTime taken

⇒a=v−ut⇒a=v-ut

⇒a=OC−ODt=DCt⇒a=OC-ODt=DCt

⇒at=DC⇒at=DC -----(ii)

By substituting the value of DC from (ii) in (i) we get

v=at+uv=at+u

⇒v=u+at⇒v=u+at

Above equation is the relation among initial vlocity (uu), final velocity (vv), acceleration (a) and time (t). It is called first equation of motion.

Equation for distance –time relation

Distance covered by the object in the given time ‘t’ is given by the area of the trapezium ABDOE

Let in the given time, t the distance covered by the moving object = s

The area of trapezium, ABDOE

= Distance (s) = Area of △ABD+△ABD+ Area of ADOE

⇒s=12×AB×AD+(OD×OE)⇒s=12×AB×AD+(OD×OE)

⇒s=12×DC×AD+(u+t)⇒s=12×DC×AD+(u+t)

[Since, AB=DCAB=DC]

⇒s=12×at×t+ut⇒s=12×at×t+ut

⇒s=12×at×t+ut⇒s=12×at×t+ut

[∵ DC=atDC=at]

⇒s=12at2+ut⇒s=12at2+ut

ANSWER:

The perimeter is 26 m

Step-by-step explanation:

Given :

AREA = 42 m²

Length = 7 m

To find :

The Perimeter

Solution :

To get the perimeter, we need to find the breadth of the rectangle first.

★ Breadth -

Let the breadth be y

⇒ Area = Length × Breadth

⇒ 42 = 7 × y

⇒ 42 = 7Y

⇒ y = 42/7

⇒ y = 6

Breadth = 6 m

★ Perimeter = 2(Length + Breadth)

⇒ 2(7 + 6)

⇒ 14 + 12

⇒ 26 m

Therefore, the perimeter is 26 m.

Answer:

hey mate.. your answer:

Firstly, they have given that 2 and 1/2 are the ZEROES.

So, basically, you should substitute these values ONE by one in the equation for x

in the first case,

p(x) = 4x²-2x-(k-4)

p(x) = 4x²-2x-k + 4

p(x) = 4 (2) ² - 2(2) -k+4=0

64-4-k+4=0

64-k=0

k=64

do the same TAKING 1/2..

hope this helps

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1 Litre = 1000 ML = 1×10³ mL

HENCE,

82 LITRES = 82×10³ mL

= 82000 mL

Also 23 mL is to be added :

82000+23 mL = 82023 mL

→ 82 L 23 mL = 82023 mL

ANSWER:

LENGTH will 6 m is your answer

The PROBABILITY is of 1/18 2/18 3/18

ANSWER:

what is this SIR , which game, I have seen THIN in NEWSPAPERS

ANSWER:

x=6    y=0

Step-by-step EXPLANATION:

ADDING both equation

 (x+3y=6)

=(2x-3y=12)

=>3x=18

=>x=6

putting value of x in x+3y=6

6+3y=6

3y=0

y=0

Answer:

2×5=10

the PRODUCT is positive

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ANSWER:

QUOTIENT - x^2 - 4X + 1

remainder - 0

hope it HELPS you

Answer:

TOTAL bottons = 4+7+3+6 = 20 bottons

bottons which KNOCKED out on the floor = 1

PROBABILITY of bottons on the floor = 1/20

= 20

Answer :

E = 1/2

F = 7/2

A = 25 ×2

B = 5 × 2 /7

C = 4 ×2/7

D = 24 ×2

EXPLANATION

D = 24

E

=> D = 24 E ......1

=> C÷F = 4 => C = 4F ......2

=> put these values in last two equation

B-4F = F AND A - 24E = E

B = 5F AND A = 25E

=> replace value of A and B in first 2 equations and SOLVE in terms of E and F GET value of E and F

and sbstitute these to get value of A, B, C, D

25E +5F = 30 4F +24E = 26

5E + F = 6 2F + 12 E = 13 .....

10E +2F = 12 ......

WE GET

E = 1/2 and F = 7/2

buy getting these we can calculate others by putting these values in dark marked equation.

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ANSWER:

so, ANS your QUESTIONS is 100

Answer:

Step-by-step explanation:

9. height of the submarine=3500

it ascends 1200m

new position=3500-1200=2300m below sea level

10. now balance of rehana in march=2000/-

in april she deposited means she added 700 to already existing balance=2000+700=2700/-

for the month of MAY she withdrew 1000 now her balance is=2700-1000=1700/-

12. he travelled towards east of delhi by 49m

and NEXT travelled towards west of delhi by 80m

the distance from delhi is=80-49=31m

11. the whole distance an have 53m

the time taken for 1m =5s

now start with the first 5m it takes 25sec but it descends 1m again so it takes another 5 sec

time taken for first 5m=30s

so in the same way we can have 10*30=300s for 50m

we are left with 3 more metres=3*5=15sec

so TOTAL time=300+15=315 sec

Answer:

,,,,,, hope it will HELP u

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Step-by-step explanation:

A paragraph is a self-contained unit of a discourse in writing dealing with a particular POINT or idea. A paragraph consists of one or more sentences. Though not REQUIRED by the SYNTAX of any language, paragraphs are usually an expected part of formal writing, used to ORGANIZE longer prose

Given:

Rs. 40,000 was invested for four years, partly in Scheme A at 12%  Simple Interest p.a. and partly in Scheme B at 8% Simple  Interests p.a.

Interest received from scheme A is Rs. 14400 more than the interest earned from scheme B

To find:

The interest earned from  Scheme B

Solution:

Let Rs. "X" be the sum of money invested in scheme A so, Rs. "(40,000 - x)" will be the sum of money invested in scheme B.

The formula for calculating simple interest is given as,

Now, ACCORDING to the question, we can form an equation as,

⇒

⇒

⇒

⇒

⇒

⇒ ← sum of money invested in scheme A

∴ Sum of money invested in scheme B = 40000 - 34000 = Rs. 6000

∴ Interest Earned from scheme B =

Thus, the interest earned from scheme B was Rs. 1920.

-----------------------------------------------------------------------------------------

Also View:

Nishu invested an amount of rs. 13,900 divided in TWO different schemes a and b at the simple interest rate of 14% p.A. And 11% p.A. Respectively. If the total amount of simple interest earned in 2 years be rs. 3508, what was the amount invested in scheme b?

brainly.in/question/8124898

An amount of rs.16100 is earned when a certain sum is invested for 3 years in scheme-A offering simple interest @ 5 p.a. How much more interest will be earned if the same sum were invested for 2 years in scheme-B offering simple interest @ 8 p.a. ?

brainly.in/question/15113567

A sum of money quadruples itself in 24 years under simple interest scheme the rate of interest in?

brainly.in/question/9686589

ANSWER:

A decimal is a fraction WRITTEN in a SPECIAL FORM. Instead of writing 1/2, for EXAMPLE, you can express the fraction as the decimal 0.5, where the zero is in the ones place and the five is in the tenths place. Decimal comes from the Latin word decimus, meaning tenth, from the root word decem, or 10....

Answer:

the probability is 5/8 because the TOTAL participants is 8 and that of the men is 5 so it is 5/8

Step-by-step EXPLANATION:

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Answer:

15 cm

Step-by-step EXPLANATION:

HYPOTENUSE = 17 inch

Width = 8 inch

Let the LENGTH of the TV be x.

Using Pythagoras THEOREM,

(Hypotenuse)² = (Width)² + (Length)²

(17)² = (8)² + x²

289 = 64 + x²

289 - 64 = x²

x² = 225

x = √225

x = 15

Hence, length of TV = 15 cm

Question:-

A train goes from one STATION to another station with a normal speed. and comes back with double speed . if DISTANCE between the stations be 500 km . find the portion of AVERAGE speed to maximum speed.

Step-by-step explanation:

let normal speed of train be v km/ h

time taken to reach= distance/ speed

T1 = 500/ v

again

time taken to come back T2= 500/2v

average speed = total distance/ total time

= (500+500) / ( T1+T2)

= 1000/(T1+T2)

portion of maximum speed to average speed

2v/[ 1000 / (T1+T2)]

= [ 500/T2] / [ 1000/(T1+T2)]

=( 500/2T1) × [ ( T1+T2) / 1000]

= ( T1+T2) / 2T1

but in the question to find avg : Max

=>2 T1/ ( T1+T2)

but T2 = 2 T1=>

portion= 2T1/( T1+2T1)

ans = 2/3

Answer:

Step-by-step explanation:

WIDTH of a RECTANGLE = 3m

Length of that rectangle = 5times it's width = 5 × 3m = 15M

Area of rectangle = length × BREADTH = 3m × 15m = 45m^2