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Vin Mwale
Questions and answers by
Vin Mwale
Questions (6)
The sixth term of GP is 16 and the third term is 2.Find the first term and common ratio. 6th term =16 3rd term=2 So ar^5=16 and
7 answers
3,486 views
If n(AuBuC)=12 and n(AuB)=8,find n(A'nB'nC). Solution n(A'nB'nC)=12 -8 =4
4 answers
1,842 views
The first three terms of GP are x+1,(x^2-1) and (x^2-1)(2x-4).Calculate the value of x. Suggested solution;ar^2/ar,so r=2x-4 and
3 answers
340 views
tan 39°=40/AP, So AP =40/tan. in triangle AQP, angle Q= 60/sin 91°=AP/SinQ. Then bearing of Qfrom P = 30° 180°-(91 angle Q).
2 answers
742 views
if cosine A=0•8 find sine B
3 answers
523 views
how many lines of symmetry does a rectangle have?
2 answers
584 views
Answers (35)
I would open my branket first
Yes you are right because it will be 55/100*400pages =220 pages
Yes Steve you right. there are 4 2^x, which means 4(2^x), which will be 2^2(2^x), then we get the powers we have 2^2 x, thats because when nultiplying numbers with same bases we just add the powers. so will be 2^2 x=2^9. we leave the bases and get the
equation=change in y/change in x=slope. so y--5/x-0=2/3. cross multiply so the equation will be 3y 15=2x 0
its maths. Because std deviation is how far one is away from the mean.
Pie*diameter, divided by speed. (22/7*4.2*2)/6 hours.
A. P(multiple of 5)=19/99
72/12
(9+5)^3/(5^3)=rate of increase in volume
(11+x) (8+x)=208. X^2+19x-120=0. Factorise so x=5 or x=-24. So the value that satisfies is 5.so it is after 5 years
Let the loss or profit be x, Cost Price be CP and Selling Price be SP. So SP-profit is equal to SP +loss. SP-x = SP+x. Substituting Rs2000-x=1600+x. So 2x=400 and x =Rs200. So loss or profit is Rs200 and CP is Rs1800
Any mathematical statement with an equal sign is an equation,so this is a linear equation. And 3a+2b-7 is an expression with 3 terms:3a,2b and 7.
Review your question if it is correctly asked
Kim is x+7years and May is x years old. So 3(x+7) + 5x = 165. 8x + 21 = 165. 8X= 144 X= 18. So Kim is 18+7 which is 25years and May is 18years
3rd term is ar^2=12 and 6th term is ar^5=96 To find r we divide 6th term by 3rd term. So r =2. Then substitute in 3rd term and so the 1st term(a) =3. So GP sum of 9 terms is S9=a(r^n-1)/r-1. Substituting we have S9=3(2^9-1)/2-1. So the answer is 1533
Fraction equal to 40litres =5/5-1/5. So 4/5 =40 litres ,what about 5/5? So its 5/5*5/4*40 litres. So the answer is 50 litres
This is too much,there is need for personal tutorial.
5dm to m =0.5m. Therefore volume =L * B * H. =15*6*0.5m. =45m^3
12AB + 7B = 5A. 7B = 5A - 12AB, 7B =A(5 - 12B). Divide both sides by (5 - 12B) 7B/(5 - 12B) = A
Multiply equation 1 by 2 6x+4y=38 multiply equation 2 by 3 6x-9y=18 Subtract them, then 13y=56. So y =56/13 and after substituting, x=45/13
The least number of marbles in a box is 11
Some information is needed
So what is a question in your sum
Thats it Damon
Factors of 16 are: 1,2,4,8,and 16
Rewrite your sum properly
From home the speed was 5km/hr. Back to home the speed was 3km/hr. Therefore his average speed=5km/hr+3km/hr devide by 2. That's 8km/hr divide by 2. So his average speed was 4km/hr.
In AP,a=4, 3rd=4+2d, 7th=4+6d. We are told that: 4=a in GP, 4+2d=4r in GP and 4+6d=4r^2. So it becomes: 4+2d=4r(¡) and 4+6d=4r^2(¡¡). So in (¡) d=2r-2, and substitute in (¡¡) and becomes: 4+6(2r-2)=4r^2, and becomes 4r^2-12r+8=0. Which is
Rahim's second sum............... Diameter=10cm.. Radius=10/2=5cm. So we have formed a right angled triangle with hypotenuse 5cm,height 4cm and base as half of chord. So we are to use pythagorous theorem. 5 square=4square +half chord square.. So
Rahim's first sum............... Cost price=100%. Gain=26%, meaning that selling price is 126% after 10% discount. So marked price before discount was 126%+10%. Therefore marked price should be at 136%
Miltiply whole numbers and roots separately. So 3 one third of 90 means 10/3 root 90 and 5 root of 6 * 2/3 root 15 becomes 10/3 root 90. Therefore 10/3 root 90=10/3 root 90. Which will be 1=1 after dividing both sides by 10/3 root 90.
Thanks Reiny.
Drug needed in 30ml at 2mg/ml =2mg*30 which is 60mg. Therefore number of ml at 7mg/ml =60mg/7mg. So the answer is 8.5ml of grape syrup. Conclussion: The value of ₹₹ is 8.5
30%=48 so 100% =more. Therefore it will be 100%/30%*48. So the answer is 160
AuBuC={3,4,5,6,7,8,9,10,11,}
