iFruit:

beautifulalps:

Hello Teacher, pls help us.

(-2)^5x(-3)4(-5)+(-6)^2-(-7)( - 8 )

this answer must be 8. But i could not solve that answer. There is something wrong. :stupid:

It should perhaps be

(-2)^5 + (-3)4(-5)+(-6)^2 -(-7)( - 8 )

beautifulalps
for your question ans shd be -1900 if i am not wrong
-32*60+36-56=-1900
maybe you copy it wrongly?

I think ifruit is correct
-32+60+36-56=8
which give you the ans you want=D

wassup

de email notification sort of stop and was having quite alot of things on hand so was unactive for the last few months.

leesf:

suiyuan:

Hi Teacher Guan Hui


Please help.

1)Mrs Lee has 2 daughters,Alice and Judy.The highest common factor and lowest common multiple of their ages are 3 and 168 respectively.If Alice is 3 years older than her sister, find her age.

2)The HCF and LCM of 270 and A are 18 and 5940 respectively. What is the value of A?

Thank you

Answer given for 2nd question in this thread was 396. My child got this question for his homework & I showed him the working but his teacher marked it wrong. Anyone can help? TIA

Hello... I guess the teacher is wrong>.>

Sahimi:

Pls help !


Q1) Given that x2 + y2 = 185 and xy = -12, find the value of (x - y)2

Q2) If (a - b)2 = 72 and ab = 8.5, calculate the value of a2 + b2.

Q3) Given that 1043square - 1037square = 120y, find value the y without using calculator.

1)(x-y)^2=x^2-2xy+y^2
= x^2+y^2-2xy
= 185-2(-12)
=185+24
=209

2) you may want to try to do it using q1 method

3)using (x+y)(x-y)=x^2-y^2
1043^2-1037^2=(1043+1037)(1043-1037)
=(2080)(6)
=(208)(60)
=(104)(120)
=120y
therefore y= 104

since a+b=Q and Q=32 and a=b

a= 16, b=16
since c+b=P and P=46 and b=16
c=30
a+b+c= 16+16+30= 62(impossible since E=60)
E-(a+b+c)=W=60-62= -2 (unless negative is accepted as the ans?)


[/quote]

seems correct to me=D

Ok lor for the latest question about partial fraction. I found out if you take the numerator divided by any of the denominator it will get the same remainder(using long division). But still thinking a way to give you the answer.

Wa=D but i am not a talent but I am glad I am of help sometimes… still working on it=p

haha i got it to this step yest too but still thinking on what to do to the numeratorXD

q3 workings always start with 1x1x because i already dictate where the 1st and 2nd letter has gone to.

I am sure there is a better solution then mine=/